Accession Number:

AD0260031

Title:

INVESTIGATION OF OXIDATION-RESISTANT COATINGS ON GRAPHITE AND MOLYBDENUM IN TWO ARC-POWERED FACILITIES

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

1.0

Abstract:

A number of leading-edge specimens of ATJ graphite and 0.5 Ti-Mo alloy were tested in a 6-inch subsonic low-pressure arc-powered tunnel and a 1,500-kw subsonic arc jet to determine the effectiveness of several refractory coatings in preventing the oxidation of these materials. The results indicate that the siliconized coating for the ATJ graphite and the W-2 and Durak MG coatings for the Ti-Mo alloy provide adequate protection at temperatures up to 3,000 F for the durations of the tests in these facilities, approximately 70 sec in the arc tunnel and approximately 10 min in the arc jet. The stability of these coatings may be depreciated under the low-pressure environmental conditions encountered during reentry. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE