HIGH-TEMPERATURE OXIDATION PROTECTIVE COATINGS FOR VANADIUM-BASE ALLOYS
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 08, 1962
- Accession Number
- AD0269799
Entities
People
- F.c. Holtz
Organizations
- IIT Research Institute