Accession Number:

AD0269799

Title:

HIGH-TEMPERATURE OXIDATION PROTECTIVE COATINGS FOR VANADIUM-BASE ALLOYS

Descriptive Note:

Corporate Author:

IIT RESEARCH INST CHICAGO ILL

Personal Author(s):

Report Date:

1962-01-08

Pagination or Media Count:

15.0

Abstract:

Oxidation-protective coatings for vanadium alloys were investigated for use at 2000 F and above. Coatings of flame-sprayed Ni on V-1Ti-60Nb afforded protection for over 60 hr at 2000 F without evidence of failure, and initial oxidation tests at 2200 F also indicate promise. A glassy phase is formed on the outer surface after relatively short exposure to air, and the selfhealing capabilities of this phase are being investigated. Pack-cementation siliconized coatings applied under Ar at 2200 F, using NaF as an activator, were protective on V-1Ti-60Nb for 500 hr at 2000 F and 283 hr at 2200 F without failure. Initial tests of the siliconized coating on V-5Ti-20Nb show no signs of failure after 30 hr at 2000 and 2200 F. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE