PROTECTIVE COATINGS FOR MOLYBDENUM ALLOYS
Abstract
Two Mo coating tasks were studied. One involved an investigation of four commercial coatings at a 2200 F by thermal shock, flexure and impact tests. A thorough analysis was made of the coating failures, based on fundamental relationships of the coating and base materials, their process parameters, and thermal stress differentials. The relative merit of the coating life at 2200 F was established by relating the consistency of test life to the crack frequency which occurred during testing. The second task involved the study of fundamental relationships existing in an approach to infiltrate refractory glasses into flame sprayed oxide coatings on Mo and on Nb and Ta bond coats deposited on Mo by arc and plasma spraying and vacuum sputtering. Studies were made on coating reactivity with base metal, surface tension, elastic differential stress, and metallic oxidation and diffusion. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1960
- Accession Number
- AD0259028
Entities
People
- J.w. Graham
- W.b. Hall
Organizations
- General Electric