Ternary Phase Equilibria in Transition Metal-Boron-Carbon-Silicon Systems. Part 2. Ternary Systems. Volume XII. Ti-Zr-B Systems. Investigation of Pseudo-Binary Systems ZRB2-NBB2, ZRB2-TAB2, and HFB2-NBB2

摘要

The ternary system titanium-zirconium-boron was investigated from 1000 C to 3245 C, the melting temperature of zirconium diboride. The equilibria which exist have been determined except for the boron-rich equilibria which have been estimated. The following notable features were found: minimum melting occurs in the titanium rich corner of the ternary; a four-phase reaction involving beta-metal phase, monoboride, diboride, and liquid occurs at a temperature slightly higher than the minimum melting; zirconium exchanges with titanium in titanium monoboride to about 9 atomic percent zirconium; and the metal diborides form a continuous series of solid solutions. No ternary compounds were found. The techniques used in the investigation were X-ray analysis, melting point determination, and metallographic examination. (Author)