Heat Resistant Diffusion Coating for Niobium Alloy
FOREIGN AEROSPACE SCIENCE AND TECHNOLOGY CENTER WRIGHT-PATTERSON AFB OH
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The question of protecting niobium and its alloy from high- temperature corrosion is a current one at the present time. Diffusion coatings are receiving ever more widespread application for this purpose. Silicide diffusion coatings possess high durability. Much attention is being given abroad to a coating of chromium, titanium and silicon obtained by the method of vacuum treatment in an alloy of titanium with chromium, with subsequent siliconization. However, the indicated works do not present the results of the study for the purpose of selecting the optimal technological process ensuring a diffusion layer of maximal durability. We studied the possibility of using a simpler technological process as compared with that described for obtaining a tri- component coating containing titanium, chromium and silicon and protecting the niobium against oxidation at a temperature of 1100-1200 deg C.
- Coatings, Colorants and Finishes
- Properties of Metals and Alloys