非晶颗粒增强铝基非晶复合材料的爆炸压实及其力学性能

Research of Explosively Compacted Metallic Glass Particles-Reinforced Al Based MMCs and Its Mechanical Property

用爆炸压实法制备了非晶颗粒增强铝基复合材料,复合材料中增强相非晶颗粒的含量分别为5%,10%,15%和20%。XRD和DTA分析的结果表明,爆炸压实过程中非晶颗粒未发生晶化现象。SEM分析的结果表明,非晶颗粒在基体中分布均匀。对爆炸压实件的硬度、密度、强度进行了检测,结果表明,该复合材料的强度高于纯铝,随着非晶颗粒含量的增加,复合材料的硬度和强度呈增大趋势。

Metallic glass particles-reinforced Al based MMCs without mach hole, cracking and obvious defects were fabricated successfully by explosive compaction of powders. The mass fractions of the amorphous phase are 5%, 10%, 15% and 20% in the experiment. XRD and DTA analysis of the composite specimens show that the amorphous phase is maintained in the composites without crystallization during the compaction. Furthermore the SEM micrographs of the composites show that the metallic glass particles are randomly distributed in the matrix. Compared to the monolithic AI, the composites have higher Rockwell hardness and yield strength which is proportional to the mass fraction of metallic glass reinforcement phase.