Accession Number : AD0489154

Title :   TERNARY PHASE EQUILIBRIA IN TRANSITION METAL-BORON-CARBON-SILICON SYSTEMS. PART II. TERNARY SYSTEMS. VOLUME VI. ZR-HF-B SYSTEMS.

Descriptive Note : Technical rept.,

Corporate Author : AEROJET-GENERAL CORP SACRAMENTO CA MATERIALS RESEARCH LAB

Personal Author(s) : Harmon, David P.

Report Date : NOV 1965

Pagination or Media Count : 64

Abstract : The ternary system zirconium-hafnium-boron has been established for temperatures above 750 C with the air of melting point, X-ray, and metallographic investigations of chemically analyzed alloys. A brief thermochemical evaluation of the system was made at 1400 C, and the Gibbs free energies of formation for both the hafnium monoboride and hypothetical zirconium monoboride were calculated. The zirconium-hafnium system was reviewed using differential-thermal analytical techniques, and the proposed binary diagram is given. (Author)

Descriptors :   *PHASE STUDIES), *ZIRCONIUM), (*TRANSITION METALS, (*BORIDES, (*HAFNIUM, BORIDES), METALLOGRAPHY, DIFFERENTIAL THERMAL ANALYSIS, MELTING POINT, X RAY DIFFRACTION, REFRACTORY MATERIALS, INTERMETALLIC COMPOUNDS, SOLUBILITY, REFRACTORY METAL ALLOYS, HEAT TREATMENT, CHEMICAL ANALYSIS, THERMOCHEMISTRY.

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE