Graphene-coated steel sheet, and method for manufacturing same
AssigneesPosco, Postech Academy-Industry Foundation
InventorsChan Cuk Hwang, Yong Gyun Jung, Han Na Hwang, Jae In Jeong, Ji Hoon Yang
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Abstract
A graphene-coated steel sheet and a method for manufacturing the same are provided. The graphene-coated steel sheet includes a steel sheet and a graphene layer formed on the steel sheet. Therefore, the graphene-coated steel sheet can be useful in preventing corrosion of iron, such as oxidation of iron, and has remarkably excellent thermal conductivity and electrical conductivity, as well as excellent heat resistance resulting from thermal stability of graphene. Also, the method can be useful in manufacturing a high-quality graphene-coated steel sheet having a monocrystalline form and showing substantially no defects or impurities.
Claims22
A graphene-coated 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 Å, and
- the graphene-coated steel sheet satisfies the following Expression 1:
- X≦0.8 eV, Expression 1
- wherein X represents a full width at half maximum (FWHM) of graphene included in the steel sheet on the 1S core level spectra of carbon (C) as measured using a high-resolution photoelectron spectrometer (HRPES).
A method for manufacturing a graphene-coated steel sheet, comprising:
- 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 1100° 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 Å.
A method for manufacturing a graphene-coated steel sheet, comprising:
- 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 1100° 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 Å.
Dependencies are inferred from the claim text.