METHOD FOR PRODUCING CARBOBORIDES OF RARE-EARTH METALS

文件类型：PDF文档
文件大小：301K
FIELD : metallurgy. SUBSTANCE : initial blank is shaped as a stoichiometric powder charge of low hydride phase of metal, carbon and boron, after that the initial blank is annealed in vacuum at 1100°C for 10 minutes, the blank is cooled, ground and pressed into a rod, which is annealed at 1100°C for 10 minutes in vacuum, then the produced rod is cooled, ground and pressed into a rod, then it is subjected to arc remelting on a cooled copper hearth in argon atmosphere to produce a sample containing carboborides of rare-earth metals, after which the produced sample is heated in a vacuum up to 950°C and kept at such temperature for 12 hours with subsequent hardening of the sample in water. EFFECT : production of single-phase samples of carboborides of rare-earth elements is provided. 2 dwg, 2 tbl, 1 ex