Laves相TaCr2合金室温脆性及增韧的研究进展

摘要

The reason for room-temperature brittleness of TaCr2 Laves phase alloy and the toughening method are reviewed.The research progress on the alloy toughening and the existing problems are introduced from the aspects of composition design and structure controlling,alloying toughening,material preparation technique improvement,etc.The room-temperature brittleness is mainly ascribed to the large unit cell size and complex lattice structure of TaCr2 .The future research should focus on the micro-nano scale high strength and toughness tantalum-chrome multi-component composites prepared using the new powder metallurgy technology.%综述了Laves相TaCr2合金室温脆性的成因及其增韧方法,从成分设计与组织调控、合金化增韧以及材料制备技术改进等方面介绍了该合金增韧的研究进展和存在的问题.Laves相TaCr2合金的室温脆性主要是由于TaCr2的晶胞尺寸大和晶格结构复杂而导致的;今后的研究应集中于利用新型粉末冶金技术制备微纳米级高强韧钽-铬多组元复合材料上.