Accession Number:

ADA143633

Title:

High Temperature Oxidation Resistant Coatings

Descriptive Note:

Final rept. Oct 83-Apr 84

Corporate Author:

ULTRAMET PACOIMA CA

Report Date:

1984-06-01

Pagination or Media Count:

22.0

Abstract:

The feasibility of chemically vapor depositing hafnium oxide and zirconium oxide onto rhenium substrates as potential oxidation resistant materials was investigated. Deposition of the oxide directly is not feasible on materials which oxidize rapidly since direct deposition requires subjecting these materials to an oxidizing environment prior to deposition. Deposition of the oxide was accomplished by first depositing the metal carbide and then oxidizing it. Hard, dense continuous coatings of hafnium carbide which showed good bond strength were achieved. Post coating heat treatment results in a good metallurgical bond between the carbide and the substrate. It has been demonstrated that hafnium carbideoxide is orders-of-magnitude more oxidation resistant that rhenium or tungsten. Author

Subject Categories:

  • Coatings, Colorants and Finishes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE