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US 9,178,222 B2Granted
Titanium fuel cell separator
AssigneeKobe Steel, Ltd.
InventorsJun Suzuki, Toshiki Sato
Life of this patent
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Abstract
Disclosed is a titanium fuel cell separator having excellent conductivity and durability. In the disclosed titanium fuel cell separator (10), a carbon layer (2) is formed on the surface of a substrate (1) formed from pure titanium or a titanium alloy. The carbon layer (2) comprises graphite which is orientated so as to be parallel to the (002) plane of the carbon layer (2). The deposition amount of the carbon layer (2) is at least 2 μg/cm2.
Claims3
A titanium fuel cell separator, comprising:
- a substrate consisting of pure titanium or a titanium alloy;
- a carbon layer and an intermediate layer between the substrate and the carbon layer, formed on a surface of the substrate,
- wherein the carbon layer has a peak intensity of the (002) plane as much as 3 times or more the peak intensity of a (100) plane, as measured by X-ray diffractometry, and wherein the carbon layer is present in a mass of coating of 2 μg/cm2 or more,
- wherein the intermediate layer is formed through a reaction between the substrate and the carbon layer by a heat treatment and comprises titanium carbide in a form of grains ranging in a direction parallel to the carbon layer.
1 more element
Dependencies are inferred from the claim text.