Accession Number:

AD0296760

Title:

HIGH-TEMPERATURE OXIDATION PROTECTIVE COATINGS FOR VANADIUM-BASE ALLOYS

Descriptive Note:

Corporate Author:

IIT RESEARCH INST CHICAGO IL

Personal Author(s):

Report Date:

1963-02-09

Pagination or Media Count:

19.0

Abstract:

Processing variables relating to the packsiliconizing of V-5wo Ti- 20wo CB and V-1wo Ti-60wo Cb are being studied. Samples coated at 2010, 2190, and 2370 F show that coating growth rate is time dependent up to 16 hnd no failures have been observed after 15 to 35 hours in 2200 F air. Tensile and other specimens of V-1wo Ti-60wo Cb have been packsiliconized for evaluation by aerospace and other organizations. Compounds of V-Cb-Ni were flame-sprayed on V-1wo Ti 60wo Cb, but excessive porosity caused rapid failure in 2000 and 2200 F air. Diffusion couples of nickel and the V-Cb-Ti allurs Silicide coatings have been applied to eleven vanadium alloys currently under development, and no failures have been observed after 15 to 35 hours in 2200 F air. Tensile and other specimens of V-1wo Ti-60wo Cb have been packsiliconized for evaluation by aerospace and other organizations. Compounds of V-Cb-Ni were flame-sprayed on V-1wo Ti 60wo Cb, but excessive porosity caused rapid failure in 2000 and 2200 F air. Diffusion couples of nickel and the V-Cb-Ti alloy were reacted at 2000 and 2200 F for 24 and 8 hours, respectively, with very slight hardening of the vanadium alloy.

Subject Categories:

  • Adhesives, Seals and Binders

Distribution Statement:

APPROVED FOR PUBLIC RELEASE