FURTHER DEVELOPMENT OF COATINGS FOR PROTECTION OF DISPERSION STRENGTHENED NICKEL FROM OXIDATION, PARTS I AND II,
Abstract
Studies were made to develop and evaluate Cr/Al duplex coatings for protection of dispersion-strengthened TD-Nickel and related alloys. Improved coating processes, both for vacuum and atmospheric pressure operation were developed. Modifications of the pack inert to control the rate of chromizing were found helpful in reducing coating defects. Protective capabilities for Cr/Al ocatings in cyclic-oxidation of greater than 500 hours at 2200F and 200 hours at 2400F were achieved. In sulfidation-erosion rig tests at 2100F, coatings were protective for about 150 hours. For temperatures of 2200F or below, neither thermal shock nor mechanical behavior were adversely affected by coating. Duplex coatings applied to TD Cobalt and TC-Nickel-Molybdenum alloys also gave satisfactory protection. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1967
- Accession Number
- AD0824880
Entities
People
- F. R. Baker
- G. B. Alexander
- J. B. Lambert
- J. D. Gadd
- L. A. Monson