Patent
US 9,689,071Graphene-Coated Steel Sheet and Method for Manufacturing the Same
Chan Cuk Hwang
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,689,071Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a graph illustrating the concept of a full width at half maximum (FWHM); [0016]
FIG. 2 is a schematic diagram showing a method for manufacturing a graphene-coated steel sheet according to one exemplary embodiment of the present invention. …
FIG. 3 is a graph illustrating the photoelectron spectroscopy spectra obtained to dete nn ine a surface state of a graphene-coated steel sheet manufactured …
FIG. 4 is an image illustrating the low-energy electron diffraction 5 patterns obtained to determine the surface state of the graphene-coated steel sheet …
FIG. 5 is a band image of the graphene-coated steel sheet manufactured according to one exemplary embodiment of the present invention, as measured through …
FIG. 6. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS [0023] Hereinafter, exemplary embodiments of the present invention will be described in detail. However, …
FIG. 7 is an image illustrating the ferroxyl test results perfo rm ed on the graphene-coated steel sheet prepared according to one exemplary embodiment of the …
FIG. 8 is an optical microscope image showing a change in color of the test sample. As described above, the graphene-coated steel sheets according to 10 the …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene-coated -anti corrosion steel sheet comprising: a steel sheet including carbon; and a graphene layer formed on the steel sheet, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A, and the graphene-coated steel sheet satisfies the following Expression 1: Expression 1 X 1.5 eV X 0.8 eV, wherein X represents a full width at half maximum (FWHM) of graphene included in the steel sheet on the i S core level spectra of carbon (C) as measured using a high-resolution photoelectron spectrometer (HRPES).
The graphene-coate d anti=corrosion steel sheet of claim 1, wherein X is -equal to or-less than 0.2 eV to 0.8 eV.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer has two dominant domain directions.
The graphene-coated anti-conrosion steel sheet of claim 1, wherein the graphene layer is formed in a single-layer or multilayered structure.
The graphene-coated anti corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer is a monocrystalline or polycrystalline form.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein carbon (C) remaining in an intermediate layer at an interface between the steel sheet and the graphene layer is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The graphene-coated =anti=eorrosion steel sheet of claim 1, wherein sulfur (S) remaining in an interface between the steel sheet and the graphene layer is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
canceled
canceled
3KK4683.DoCx Page 2 of 11 Application No. 13/824,59 1 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 canceled
A method for manufacturing a graphene-coated-anti= corrosion steel sheet, comprising: washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly nerformin2 inert gas ion snuttering and electron beam heatinn on the surface of the steel sheet; and forming a graphene layer on the stee t sheet by heating the washed steel sheet at a temperature in a range of 400 * C to 11 000 C and injecting hydrocarbon into the vacuum container to dissociatively absorb the hydrocarbon onto the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A. 3KK4683.DoCX Page 3 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849
The method of claim 12, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- 5 Pa to 10- 2 Pa.
The method of claim 12, wherei n the washing of-the surface of the steei-sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar-ion sputtering) and electron beam heating -(e-beam heating) on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 12, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein sulfur (S) remaining on a surface of the washed steel sheet is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein a heating temperature of the washed steel sheet is in a range of 500 ° C to 900 °C.
The method of claim 12, wherein the hydrocarbon is injected at an amount of 10 Langmuirs or more.
The method of claim 12, wherein the hydrocarbon is an alkyne- based hydrocarbon, an alkene-based hydrocarbon, or an alkane-based hydrocarbon.
A method for manufacturing a graphene-coate d anti- corrosion steel sheet, comprising: 3KK4683.DOCX Page 4 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly performing inert gas ion sputtering and electron beam heating on the surface of the steel sheet; and forming a graphene layer on the steel sheet by heating the washed steel sheet at a temperature in a range of 400 ° C to 11 00 0 C to separate carbon included in the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A.
The method of claim 20, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- Pa to 10- 2 Pa.
The method of claim 20, wherei n the washing of the surfaee of the-steel sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar ion-sputtering) and e=beam electron beam heating on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 20, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or included in a single graphene layer.
The method of claim 20, wherein sulfur (S) present at a content of 4 parts by weight or less, included in a single graphene layer.
The method of claim 20, wherein a heating of 500 ° C to 900 *C. 3KK4683.DOCX Page 5 of 11 less, based on 100 parts by weight of the carbon remaining on a surface of the washed steel sheet is based on 100 parts by weight of the carbon temperature of the washed steel sheet is in a range
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating cycles (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa to remove oxides, carbon residues, and sulfur impurities. The cleaned steel sheet is then heated to 400–1100 °C (preferably 500–900 °C) and hydrocarbon gas (alkyne, alkene, or alkane; ≥10 Langmuirs) is injected into the vacuum container to dissociatively absorb onto the steel sheet and crystallize into a graphene layer. The resulting graphene domain has an average diameter of 300–1000 Å and an FWHM (C 1s core level, HRPES) of ≤1.5 eV. Ferroxyl test results confirm anti-corrosion performance compared to graphene-free steel sheet.
2 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa. The cleaned steel sheet is heated to 400–1100 °C (preferably 500–900 °C) without external hydrocarbon injection; carbon already present in the steel sheet is crystallized and separated to form a graphene layer with domain average diameter 300–1000 Å.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-coated anti-corrosion steel sheet
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
C 1s core level FWHM (HRPES) — claimed upper limit | ≤ 1.5 eV | C |
C 1s core level FWHM (HRPES) — preferred upper limit | 0.2–0.8 eV |
Patent
Atlas literature
Patent
US 9,689,071Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a graph illustrating the concept of a full width at half maximum (FWHM); [0016]
FIG. 2 is a schematic diagram showing a method for manufacturing a graphene-coated steel sheet according to one exemplary embodiment of the present invention. …
FIG. 3 is a graph illustrating the photoelectron spectroscopy spectra obtained to dete nn ine a surface state of a graphene-coated steel sheet manufactured …
FIG. 4 is an image illustrating the low-energy electron diffraction 5 patterns obtained to determine the surface state of the graphene-coated steel sheet …
FIG. 5 is a band image of the graphene-coated steel sheet manufactured according to one exemplary embodiment of the present invention, as measured through …
FIG. 6. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS [0023] Hereinafter, exemplary embodiments of the present invention will be described in detail. However, …
FIG. 7 is an image illustrating the ferroxyl test results perfo rm ed on the graphene-coated steel sheet prepared according to one exemplary embodiment of the …
FIG. 8 is an optical microscope image showing a change in color of the test sample. As described above, the graphene-coated steel sheets according to 10 the …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene-coated -anti corrosion steel sheet comprising: a steel sheet including carbon; and a graphene layer formed on the steel sheet, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A, and the graphene-coated steel sheet satisfies the following Expression 1: Expression 1 X 1.5 eV X 0.8 eV, wherein X represents a full width at half maximum (FWHM) of graphene included in the steel sheet on the i S core level spectra of carbon (C) as measured using a high-resolution photoelectron spectrometer (HRPES).
The graphene-coate d anti=corrosion steel sheet of claim 1, wherein X is -equal to or-less than 0.2 eV to 0.8 eV.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer has two dominant domain directions.
The graphene-coated anti-conrosion steel sheet of claim 1, wherein the graphene layer is formed in a single-layer or multilayered structure.
The graphene-coated anti corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer is a monocrystalline or polycrystalline form.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein carbon (C) remaining in an intermediate layer at an interface between the steel sheet and the graphene layer is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The graphene-coated =anti=eorrosion steel sheet of claim 1, wherein sulfur (S) remaining in an interface between the steel sheet and the graphene layer is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
canceled
canceled
3KK4683.DoCx Page 2 of 11 Application No. 13/824,59 1 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 canceled
A method for manufacturing a graphene-coated-anti= corrosion steel sheet, comprising: washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly nerformin2 inert gas ion snuttering and electron beam heatinn on the surface of the steel sheet; and forming a graphene layer on the stee t sheet by heating the washed steel sheet at a temperature in a range of 400 * C to 11 000 C and injecting hydrocarbon into the vacuum container to dissociatively absorb the hydrocarbon onto the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A. 3KK4683.DoCX Page 3 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849
The method of claim 12, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- 5 Pa to 10- 2 Pa.
The method of claim 12, wherei n the washing of-the surface of the steei-sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar-ion sputtering) and electron beam heating -(e-beam heating) on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 12, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein sulfur (S) remaining on a surface of the washed steel sheet is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein a heating temperature of the washed steel sheet is in a range of 500 ° C to 900 °C.
The method of claim 12, wherein the hydrocarbon is injected at an amount of 10 Langmuirs or more.
The method of claim 12, wherein the hydrocarbon is an alkyne- based hydrocarbon, an alkene-based hydrocarbon, or an alkane-based hydrocarbon.
A method for manufacturing a graphene-coate d anti- corrosion steel sheet, comprising: 3KK4683.DOCX Page 4 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly performing inert gas ion sputtering and electron beam heating on the surface of the steel sheet; and forming a graphene layer on the steel sheet by heating the washed steel sheet at a temperature in a range of 400 ° C to 11 00 0 C to separate carbon included in the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A.
The method of claim 20, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- Pa to 10- 2 Pa.
The method of claim 20, wherei n the washing of the surfaee of the-steel sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar ion-sputtering) and e=beam electron beam heating on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 20, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or included in a single graphene layer.
The method of claim 20, wherein sulfur (S) present at a content of 4 parts by weight or less, included in a single graphene layer.
The method of claim 20, wherein a heating of 500 ° C to 900 *C. 3KK4683.DOCX Page 5 of 11 less, based on 100 parts by weight of the carbon remaining on a surface of the washed steel sheet is based on 100 parts by weight of the carbon temperature of the washed steel sheet is in a range
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating cycles (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa to remove oxides, carbon residues, and sulfur impurities. The cleaned steel sheet is then heated to 400–1100 °C (preferably 500–900 °C) and hydrocarbon gas (alkyne, alkene, or alkane; ≥10 Langmuirs) is injected into the vacuum container to dissociatively absorb onto the steel sheet and crystallize into a graphene layer. The resulting graphene domain has an average diameter of 300–1000 Å and an FWHM (C 1s core level, HRPES) of ≤1.5 eV. Ferroxyl test results confirm anti-corrosion performance compared to graphene-free steel sheet.
2 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa. The cleaned steel sheet is heated to 400–1100 °C (preferably 500–900 °C) without external hydrocarbon injection; carbon already present in the steel sheet is crystallized and separated to form a graphene layer with domain average diameter 300–1000 Å.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-coated anti-corrosion steel sheet
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
C 1s core level FWHM (HRPES) — claimed upper limit | ≤ 1.5 eV | C |
C 1s core level FWHM (HRPES) — preferred upper limit | 0.2–0.8 eV |
Patent
Atlas literature
Patent
US 9,689,071Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a graph illustrating the concept of a full width at half maximum (FWHM); [0016]
FIG. 2 is a schematic diagram showing a method for manufacturing a graphene-coated steel sheet according to one exemplary embodiment of the present invention. …
FIG. 3 is a graph illustrating the photoelectron spectroscopy spectra obtained to dete nn ine a surface state of a graphene-coated steel sheet manufactured …
FIG. 4 is an image illustrating the low-energy electron diffraction 5 patterns obtained to determine the surface state of the graphene-coated steel sheet …
FIG. 5 is a band image of the graphene-coated steel sheet manufactured according to one exemplary embodiment of the present invention, as measured through …
FIG. 6. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS [0023] Hereinafter, exemplary embodiments of the present invention will be described in detail. However, …
FIG. 7 is an image illustrating the ferroxyl test results perfo rm ed on the graphene-coated steel sheet prepared according to one exemplary embodiment of the …
FIG. 8 is an optical microscope image showing a change in color of the test sample. As described above, the graphene-coated steel sheets according to 10 the …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene-coated -anti corrosion steel sheet comprising: a steel sheet including carbon; and a graphene layer formed on the steel sheet, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A, and the graphene-coated steel sheet satisfies the following Expression 1: Expression 1 X 1.5 eV X 0.8 eV, wherein X represents a full width at half maximum (FWHM) of graphene included in the steel sheet on the i S core level spectra of carbon (C) as measured using a high-resolution photoelectron spectrometer (HRPES).
The graphene-coate d anti=corrosion steel sheet of claim 1, wherein X is -equal to or-less than 0.2 eV to 0.8 eV.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer has two dominant domain directions.
The graphene-coated anti-conrosion steel sheet of claim 1, wherein the graphene layer is formed in a single-layer or multilayered structure.
The graphene-coated anti corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer is a monocrystalline or polycrystalline form.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein carbon (C) remaining in an intermediate layer at an interface between the steel sheet and the graphene layer is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The graphene-coated =anti=eorrosion steel sheet of claim 1, wherein sulfur (S) remaining in an interface between the steel sheet and the graphene layer is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
canceled
canceled
3KK4683.DoCx Page 2 of 11 Application No. 13/824,59 1 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 canceled
A method for manufacturing a graphene-coated-anti= corrosion steel sheet, comprising: washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly nerformin2 inert gas ion snuttering and electron beam heatinn on the surface of the steel sheet; and forming a graphene layer on the stee t sheet by heating the washed steel sheet at a temperature in a range of 400 * C to 11 000 C and injecting hydrocarbon into the vacuum container to dissociatively absorb the hydrocarbon onto the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A. 3KK4683.DoCX Page 3 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849
The method of claim 12, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- 5 Pa to 10- 2 Pa.
The method of claim 12, wherei n the washing of-the surface of the steei-sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar-ion sputtering) and electron beam heating -(e-beam heating) on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 12, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein sulfur (S) remaining on a surface of the washed steel sheet is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein a heating temperature of the washed steel sheet is in a range of 500 ° C to 900 °C.
The method of claim 12, wherein the hydrocarbon is injected at an amount of 10 Langmuirs or more.
The method of claim 12, wherein the hydrocarbon is an alkyne- based hydrocarbon, an alkene-based hydrocarbon, or an alkane-based hydrocarbon.
A method for manufacturing a graphene-coate d anti- corrosion steel sheet, comprising: 3KK4683.DOCX Page 4 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly performing inert gas ion sputtering and electron beam heating on the surface of the steel sheet; and forming a graphene layer on the steel sheet by heating the washed steel sheet at a temperature in a range of 400 ° C to 11 00 0 C to separate carbon included in the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A.
The method of claim 20, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- Pa to 10- 2 Pa.
The method of claim 20, wherei n the washing of the surfaee of the-steel sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar ion-sputtering) and e=beam electron beam heating on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 20, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or included in a single graphene layer.
The method of claim 20, wherein sulfur (S) present at a content of 4 parts by weight or less, included in a single graphene layer.
The method of claim 20, wherein a heating of 500 ° C to 900 *C. 3KK4683.DOCX Page 5 of 11 less, based on 100 parts by weight of the carbon remaining on a surface of the washed steel sheet is based on 100 parts by weight of the carbon temperature of the washed steel sheet is in a range
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating cycles (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa to remove oxides, carbon residues, and sulfur impurities. The cleaned steel sheet is then heated to 400–1100 °C (preferably 500–900 °C) and hydrocarbon gas (alkyne, alkene, or alkane; ≥10 Langmuirs) is injected into the vacuum container to dissociatively absorb onto the steel sheet and crystallize into a graphene layer. The resulting graphene domain has an average diameter of 300–1000 Å and an FWHM (C 1s core level, HRPES) of ≤1.5 eV. Ferroxyl test results confirm anti-corrosion performance compared to graphene-free steel sheet.
2 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa. The cleaned steel sheet is heated to 400–1100 °C (preferably 500–900 °C) without external hydrocarbon injection; carbon already present in the steel sheet is crystallized and separated to form a graphene layer with domain average diameter 300–1000 Å.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-coated anti-corrosion steel sheet
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
C 1s core level FWHM (HRPES) — claimed upper limit | ≤ 1.5 eV | C |
C 1s core level FWHM (HRPES) — preferred upper limit | 0.2–0.8 eV |
Patent
Atlas literature
Patent
US 9,689,071Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a graph illustrating the concept of a full width at half maximum (FWHM); [0016]
FIG. 2 is a schematic diagram showing a method for manufacturing a graphene-coated steel sheet according to one exemplary embodiment of the present invention. …
FIG. 3 is a graph illustrating the photoelectron spectroscopy spectra obtained to dete nn ine a surface state of a graphene-coated steel sheet manufactured …
FIG. 4 is an image illustrating the low-energy electron diffraction 5 patterns obtained to determine the surface state of the graphene-coated steel sheet …
FIG. 5 is a band image of the graphene-coated steel sheet manufactured according to one exemplary embodiment of the present invention, as measured through …
FIG. 6. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS [0023] Hereinafter, exemplary embodiments of the present invention will be described in detail. However, …
FIG. 7 is an image illustrating the ferroxyl test results perfo rm ed on the graphene-coated steel sheet prepared according to one exemplary embodiment of the …
FIG. 8 is an optical microscope image showing a change in color of the test sample. As described above, the graphene-coated steel sheets according to 10 the …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene-coated -anti corrosion steel sheet comprising: a steel sheet including carbon; and a graphene layer formed on the steel sheet, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A, and the graphene-coated steel sheet satisfies the following Expression 1: Expression 1 X 1.5 eV X 0.8 eV, wherein X represents a full width at half maximum (FWHM) of graphene included in the steel sheet on the i S core level spectra of carbon (C) as measured using a high-resolution photoelectron spectrometer (HRPES).
The graphene-coate d anti=corrosion steel sheet of claim 1, wherein X is -equal to or-less than 0.2 eV to 0.8 eV.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer has two dominant domain directions.
The graphene-coated anti-conrosion steel sheet of claim 1, wherein the graphene layer is formed in a single-layer or multilayered structure.
The graphene-coated anti corrosion steel sheet of claim 1, wherein a graphene domain of the graphene layer is a monocrystalline or polycrystalline form.
The graphene-coated anti=corrosion steel sheet of claim 1, wherein carbon (C) remaining in an intermediate layer at an interface between the steel sheet and the graphene layer is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The graphene-coated =anti=eorrosion steel sheet of claim 1, wherein sulfur (S) remaining in an interface between the steel sheet and the graphene layer is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
canceled
canceled
3KK4683.DoCx Page 2 of 11 Application No. 13/824,59 1 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 canceled
A method for manufacturing a graphene-coated-anti= corrosion steel sheet, comprising: washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly nerformin2 inert gas ion snuttering and electron beam heatinn on the surface of the steel sheet; and forming a graphene layer on the stee t sheet by heating the washed steel sheet at a temperature in a range of 400 * C to 11 000 C and injecting hydrocarbon into the vacuum container to dissociatively absorb the hydrocarbon onto the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A. 3KK4683.DoCX Page 3 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849
The method of claim 12, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- 5 Pa to 10- 2 Pa.
The method of claim 12, wherei n the washing of-the surface of the steei-sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar-ion sputtering) and electron beam heating -(e-beam heating) on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 12, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein sulfur (S) remaining on a surface of the washed steel sheet is present at a content of 4 parts by weight or less, based on 100 parts by weight of the carbon included in a single graphene layer.
The method of claim 12, wherein a heating temperature of the washed steel sheet is in a range of 500 ° C to 900 °C.
The method of claim 12, wherein the hydrocarbon is injected at an amount of 10 Langmuirs or more.
The method of claim 12, wherein the hydrocarbon is an alkyne- based hydrocarbon, an alkene-based hydrocarbon, or an alkane-based hydrocarbon.
A method for manufacturing a graphene-coate d anti- corrosion steel sheet, comprising: 3KK4683.DOCX Page 4 of 11 Application No. 13/824,591 Paper Dated: In Reply to USPTO Correspondence of Attorney Docket No. 6166-130849 washing a surface of a steel sheet including carbon in a vacuum container with inert gas ions by repeatedly performing inert gas ion sputtering and electron beam heating on the surface of the steel sheet; and forming a graphene layer on the steel sheet by heating the washed steel sheet at a temperature in a range of 400 ° C to 11 00 0 C to separate carbon included in the steel sheet by crystallizing the carbon, wherein a graphene domain of the graphene layer has an average diameter of 300 to 1000 A.
The method of claim 20, wherein a pressure in the vacuum container in the washing of the surface of the steel sheet is in a range of 10- Pa to 10- 2 Pa.
The method of claim 20, wherei n the washing of the surfaee of the-steel sheet is performed by repeatedly performing repeated inert gas ion sputtering (Ar ion-sputtering) and e=beam electron beam heating on the surface of the steel sheet is performed 10 to 200 times.
The method of claim 20, wherein carbon (C) remaining on a surface of the washed steel sheet is present at a content of 15 parts by weight or included in a single graphene layer.
The method of claim 20, wherein sulfur (S) present at a content of 4 parts by weight or less, included in a single graphene layer.
The method of claim 20, wherein a heating of 500 ° C to 900 *C. 3KK4683.DOCX Page 5 of 11 less, based on 100 parts by weight of the carbon remaining on a surface of the washed steel sheet is based on 100 parts by weight of the carbon temperature of the washed steel sheet is in a range
Embodiments described in the patent, grouped by the materials and process steps they use.
3 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating cycles (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa to remove oxides, carbon residues, and sulfur impurities. The cleaned steel sheet is then heated to 400–1100 °C (preferably 500–900 °C) and hydrocarbon gas (alkyne, alkene, or alkane; ≥10 Langmuirs) is injected into the vacuum container to dissociatively absorb onto the steel sheet and crystallize into a graphene layer. The resulting graphene domain has an average diameter of 300–1000 Å and an FWHM (C 1s core level, HRPES) of ≤1.5 eV. Ferroxyl test results confirm anti-corrosion performance compared to graphene-free steel sheet.
2 materials1 process step
A steel sheet surface is washed in a vacuum container using repeated Ar-ion sputtering and electron beam heating (10–200 times) at pressures of 10⁻⁵ to 10⁻² Pa. The cleaned steel sheet is heated to 400–1100 °C (preferably 500–900 °C) without external hydrocarbon injection; carbon already present in the steel sheet is crystallized and separated to form a graphene layer with domain average diameter 300–1000 Å.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-coated anti-corrosion steel sheet
Measurements and analyses referenced in the patent, with their drawing references.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
C 1s core level FWHM (HRPES) — claimed upper limit | ≤ 1.5 eV | C |
C 1s core level FWHM (HRPES) — preferred upper limit | 0.2–0.8 eV |
graphene domain average diameter — claimed range | 300–1000 Angstrom | C |
— | ≤ 0.8 eV | — |
Temperature | 400–1100 °C | — |
Temperature | 500–900 °C | — |
Temperature | 600–700 °C | — |
— | ≥ 0.2 eV | — |
Pressure | 0.00001 Pa | — |
— | ≤ 0.2 eV | — |
graphene domain average diameter — claimed range | 300–1000 Angstrom | C |
— | ≤ 0.8 eV | — |
Temperature | 400–1100 °C | — |
Temperature | 500–900 °C | — |
Temperature | 600–700 °C | — |
— | ≥ 0.2 eV | — |
Pressure | 0.00001 Pa | — |
— | ≤ 0.2 eV | — |
graphene domain average diameter — claimed range | 300–1000 Angstrom | C |
— | ≤ 0.8 eV | — |
Temperature | 400–1100 °C | — |
Temperature | 500–900 °C | — |
Temperature | 600–700 °C | — |
— | ≥ 0.2 eV | — |
Pressure | 0.00001 Pa | — |
— | ≤ 0.2 eV | — |
graphene domain average diameter — claimed range | 300–1000 Angstrom | C |
— | ≤ 0.8 eV | — |
Temperature | 400–1100 °C | — |
Temperature | 500–900 °C | — |
Temperature | 600–700 °C | — |
— | ≥ 0.2 eV | — |
Pressure | 0.00001 Pa | — |
— | ≤ 0.2 eV | — |