Experimental Phase Equilibria of Selected Binary, Ternary, and Higher Order Systems. Part V. The Phase Diagram W-B-C
Abstract
The ternary alloy system W-B-C was investigated experimentally by means of X-ray, melting point, DTA, and metallographic techniques on hot-pressed and heat-treated, as well as melted specimens, and a phase diagram from l5OO deg C through the melting range established. No ternary phases are formed in the system and the mutual solubilities between carbide and boride phases are small. The solid-state sections (<2000 deg C) are characterized by two phase equilibria existing between the phase pairs W2B + W2C, W2B + WC, WC + WB, WB + C, W2B5 + C, W2B5 + B4C, and WB~4 + B4C. The two-phase equilibrium W2B + WC is replaced by an equilibrium W2C + WB above 2150 deg C. Fifteen ternary isothermal reactions have been found. Five are associated with pseudobinary eutectic equilibria, six with ternary eutectics and the remaining four with class II ternary four-phase reaction isotherms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1970
- Accession Number
- ADA472013
Entities
People
- Erwin Rudy
Organizations
- Aerojet Rocketdyne Holdings