DEVELOPMENT AND PRODUCTION OF IMPROVED MOLYBDENUM SHEET BY POWDER-METALLURGY TECHNIQUES
Abstract
A powder-metallurgy Mo-Ti-C alloy with hightemperature properties superior to those ofARC-CAST Mo-0.5Ti-C was developed. These properties were obtained by a process which involved sintering in reducing atmospheres at about 2150 C. Although the properties can be reproduced, the process needs further study, and the mechanism which produces the superior properties should be determined. A rational explanation of the strengthening mechanism should lead to its rapid extension to other systems of refrac tory alloys. Important process variables include density of the sintered billet, reactivemetal and residual carbon content, composition of the sintering atmosphere, and sintering temperature. In comparison to alloy sheet produced by sintering at 1800 C in H, sheet of similar composition produced by sintering at 2150 C in either dissociated ammonia or H exhibit superior high-temperature properties. Vacuum sintering at 1700 and 2150 C confirmed the dependency of high-temperature sheet properties on the sintering temperature of the billet. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 05, 1962
- Accession Number
- AD0272778
Entities
People
- Roger B. Bargainnier
Organizations
- Sylvania Electric Products