Accession Number:

AD0489752

Title:

TERNARY PHASE EQUILIBRIA IN TRANSITION METAL-BORON-CARBON-SILICON SYSTEMS. PART II. TERNARY SYSTEMS. VOLUME X. THE ZR-SI-C, HF-SI-C, ZR-SI-B, AND HF-SI-B SYSTEMS

Descriptive Note:

Technical rept.

Corporate Author:

AEROJET-GENERAL CORP SACRAMENTO CA MATERIALS RESEARCH LAB

Personal Author(s):

• Brukl, C. E.

Report Date:

1966-09-01

Pagination or Media Count:

111.0

Abstract:

Phase equilibria and mutual solubilities in the Zr-Si-C, Hf-Si-C, and Hf-Si-B ternary systems have been determined at 1300 C. The general melting behavior and high temperature mutual solubilities in the Zr-Si-C, Hf-Si-C, Zr- Si-B, and Hf-Si-B systems have been studied minimum melting temperatures along various pseudo-binary sections are given. All four systems are characterized by the formation of a ternary D88-Nowotny phase. Most melting temperatures in the ternary systems are governed by the lower melting binary silicide compounds. Guidelines for feasible high temperature applications are given.

Descriptors:

• *BORON
• *CARBON
• *HAFNIUM
• *PHASE STUDIES
• *SILICON
• *TRANSITION METALS
• *ZIRCONIUM
• ARC MELTING
• CHEMICAL ANALYSIS
• FEASIBILITY STUDIES
• HEAT TREATMENT
• HIGH TEMPERATURE
• MELTING POINT
• METALLOGRAPHY
• POWDER METALS
• QUENCHING
• X RAY DIFFRACTION

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE