CuZrAlNb非晶复合材料的显微组织与力学性能

Microstructure and mechanical properties of CuZrAlNb bulk metallic glass composite

为探究CuZr基非晶复合材料的纵向显微组织及力学性能,采用铜模真空吸铸法制备直径3mm的Cu48-xZr48Al4Nbx非晶复合材料棒材。应用金相显微镜进行显微组织观察,使用X射线衍射仪分析相组成,利用差式扫描量热仪进行晶化程度分析。通过HVST-1000显微硬度计对试样纵截面进行硬度测试,分析其力学性能。结果表明:随着Nb含量增加,Cu48-xZr48Al4Nbx复合材料中晶化相数量增加,晶化程度不断增大,显微硬度随之下降。该研究可为实际生产CuZrAlNb非晶复合材料提供基础数据。

This paper discusses an effort to probe into the longitudinal microstructure and mechanical properties of Cu Zr-based amorphous composites. The investigation involves preparing Cu48-xZr48 Al4 Nbxamorphous composite rods with the diameter of 3 mm using copper mold vacuum suction casting method; observing the microstructure using metallographic microscope; analyzing the phase composition by X ray diffractometer; identifying the degree of crystallization by differential scanning calorimetry; and analyzing the hardness of the longitudinal section of the sample by HVST-1000 microhardness tester and thereby obtaining an insight into its mechanical properties. The results show that along with an increase in Nb content comes an increase both in the amount of crystalline phase and in the degree of crystallization in Cu48-xZr48 Al4 Nbxcomposite; and an increase in the number of crystalline phases is followed by a decrease in the microhardness of the two components. The study may provide the basic data for the practical production of CuZrAlNb BMGCs.