中文摘要：

利用铜模吸铸法在一定冷却速度下成功制备了树枝晶均匀分布的Cu46Zr46Al8非晶复合材料,并对其进行深冷处理,研究了深冷处理对其组织和力学性能的影响。结果表明,深冷处理使Cu46Zr46Al8非晶复合材料中晶体相B2CuZr相晶粒显著细化,CuZr相形貌也发生明显改变,由原先的树枝状变为板条状,经分析板条状相为B19’CuZr相。微观结构的改变促使复合材料的室温力学性能得到显著改善,深冷8h后其显微硬度和压缩断裂强度提高幅度最大,分别提高了14.67%和34.63%。

英文摘要：

Cu46Zr46Al8glass matrix composite was successfully prepared by copper mould suction casting process at given cooling rate and then the samples were treated by cryogenic treatment.Microstructure evolution and mechanical properties of Cu46 Zr46 Al8 metallic glass composite after cryogenic treatment were examined by means of SEM,XRD,hardness and compression tests.The results show that microstructure of the as-cast materials is composed of amorphous matrix and dendrite CuZr phase.The grain of the B2 CuZr phase is refinement and its morphology evolves from dendrite to plate-like after cryogenic treatment.XRD analysis indicates that the plate-like phase is B19＇CuZr phase.This microstructure modification results in a significant improvement on mechanical properties.The increment of microhardness and compression fracture strength reaches the highest for the Cu46 Zr46 Al8 composite after cryogenic treated 8 h,which increases by 14.67% and 34.63% compared with that of the un-treated materials,respectively.