Accession Number:

AD0274611

Title:

DEVELOPMENT AND PRODUCTION OF IMPROVED MOLYBDENUM SHEET BY POWDER-METALLURGY TECHNIQUES

Descriptive Note:

Corporate Author:

SYLVANIA ELECTRIC PRODUCTS INC TOWANDA PA

Personal Author(s):

Report Date:

1962-03-30

Pagination or Media Count:

1.0

Abstract:

A STUDY OF THE BASIC FACTORS INVOLVED IN STRENGTHENING POWDER-METALLURGY Mo-Ti-C AND Mo-Ti-N ALLOY SHEET, by S. Friedman, W. Pollack,AND C. D. Dickinson. 30 Mar 62. Strengthening in powder-metallurgy Mo-Ti-C probably involves the solution of Ti and C during sintering followed by the formation of precipitates of TiC during fabrication. Control of fabrication temperatures or the use of an inprocess solution treatment or both may be necessary to obtain optimum properties. O and N contamination during sintering is detrimental since it decreases the amount of Ti that goes into solution by forming massive, stable titanium oxides and nitrides. The formation of massive Mo2C particles at sintering temperatures above 2000 C prevents a straightforward correlation of C content and strength. Strengthening in powder-metallurgy Mo-Ti-N probably involves the formation of a fine dispersion of TiN by internal nitridization. N additions to Mo-Ti significantly raise the recrystallization temperature. However, its effect on high-temperature strength is less than that of C. O appear to have a detrimental effect on the recrystallization temperature of Mo-Ti-N. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE