Ternary Phase Equilibria in Transition Metal-Boron-Carbon-Silicon Systems. Part 2. Ternary Systems. Volume Xiv. The Hafnium-Iridium-Boron Systems

摘要

Constitution diagrams of the binary hafnium-iridium and iridium-boron systems as well as an isothermal section of the hafnium-iridium-boron ternary system have been established by means of pirani melting point investigations, metallography, Debye-Scherrer X-ray, and chemical analysis. There are three intermediate phases, Ir(3)B(2), IrB(0.89), and IrB(1.50) in the rather low melting iridium-boron system which contains four eutectics. Hf2Ir, Hf3Ir2, HfIr(1-X), HfIr, HfIr(1+X), and HfIr3 are the phases present in the hafnium-iridium system. The highest melting phase in this system is HfIr(3) whose melting point is 2460 C. (Author)