Accession Number:

AD0603774

Title:

HIGH-TEMPERATURE OXIDATION PROTECTIVE COATINGS FOR VANADIUM-BASE ALLOYS.

Descriptive Note:

Bimonthly progress rept. no. 4, 1 Apr-31 May 64,

Corporate Author:

IIT RESEARCH INST CHICAGO ILL

Personal Author(s):

Report Date:

1964-07-01

Pagination or Media Count:

21.0

Abstract:

The objective of this program is the development of oxidation protective coatings for vanadium-base alloys for use at 1800F to 2500F. The effect of pack-siliconizing on the mechanical properties of 0.020 in. thick sheet of V-60 wo Cb--1 wo Ti is being studied. Preliminary results indicate that the siliconizing process has no effect on strength, but causes some reduction in tensile ductility. The transition temperature of the coated alloy is below 32F its lower limit is currently being determined. The development of an oxidation resistant slurry or liquid cementation type of coating for V-60 wo Cb - 1 wo Ti is progressing. Slurry compositions containing tin, silicon, silver, copper, aluminum, and columbium have been investigated several of these show good coverage, even at corners and edges. The static oxidation life of other promising vanadium-base alloys, coated by the pack-siliconizing process is also being investigated. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE