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Title: METHOD FOR COATING GRAPHITE WITH METALLIC CARBIDES

Abstract

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.

Inventors:
Issue Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4165916
Patent Number(s):
2929741
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-14-015934
NSA Number:
NSA-14-015934
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND OTHER MATERIALS; ARGON; CARBIDES; CHEMICAL REACTIONS; COATING; COOLING; EVAPORATION; FILMS; GRAPHITE; HEATING; HIGH TEMPERATURE; LIQUID METALS; METALS; NIOBIUM; PRODUCTION; REFRACTORIES; SOLUTIONS; SURFACES; TIN; TITANIUM; ZIRCONIUM

Citation Formats

Steinberg, M.A. METHOD FOR COATING GRAPHITE WITH METALLIC CARBIDES. United States: N. p., 1960. Web.
Steinberg, M.A. METHOD FOR COATING GRAPHITE WITH METALLIC CARBIDES. United States.
Steinberg, M.A. Tue . "METHOD FOR COATING GRAPHITE WITH METALLIC CARBIDES". United States.
@article{osti_4165916,
title = {METHOD FOR COATING GRAPHITE WITH METALLIC CARBIDES},
author = {Steinberg, M.A.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1960},
month = {3}
}