METHOD FOR COATING GRAPHITE WITH METALLIC CARBIDES
A method for producing refractory coatings of metallic carbides on graphite was developed. In particular, the graphite piece to be coated is immersed in a molten solution of 4 to 5% by weight of zirconium, titanium, or niobium dissolved in tin. The solution is heated in an argon atmosphere to above 1400 deg C, whereby the refractory metal reacts with the surface of the graphite to form a layer of metalic carbide. The molten solution is cooled to 300 to 400 deg C, and the graphite piece is removed. Excess tin is wiped from the graphite, which is then heated in vacuum to above 2300 deg C. The tin vaporizes from the graphite surface, leaving the surface coated with a tenacious layer of refractory metallic carbide.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-14-015934
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 2929741
- OSTI ID:
- 4165916
- Country of Publication:
- United States
- Language:
- English
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