STUDY OF DUCTILE COATINGS FOR THE OXIDATION PROTECTION OF COLUMBIUM AND MOLYBDENUM ALLOYS
Abstract
Nine materials were examined as potential barriers to the degrading diffusion of elements from FS-85 and TZM substrate through platinum coatings. One metal, hafnium, and one binary combination, iridium clad tungsten, were particularly effective as diffusion barriers. However, the increase in coating life produced through usage of these metals was no more than would be expected with a similar increase in coating thickness. Coating lives of up to 66 hours were obtained at 2550F in flowing air. It appears that when formed under the proper conditions, platinum-molybdenum and platinum-columbium intermetallic compounds may act as barriers to coating-substrate interdiffusion. Their usefulness in extending coating life should be explored further.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0634402
Entities
People
- E. H. Girard
- H. Breit
- J. F. Clarke