利用搅拌铸造结合超声处理法制备镁基复合材料

在目前的研究中,利用搅拌铸造结合超声处理方法成功地制备出了不同体积分数(5vol%和10vol%)的微米颗粒增强的AZ31B镁基复合材料。利用350℃,12:1的挤压比对铸锭进行了挤压处理。利用金相和扫描电子显微镜对复合材料的微观结构进行了研究。复合材料的微观结构显示,增强体具有相对均匀的分布且晶粒获得了显著的细化。微米碳化硅颗粒的存在可以显著的提高基体合金的显微硬度﹑弹性模量以及抗拉伸强度。此外,复合材料的显微硬度﹑弹性模量以及抗拉伸强度随着微米颗粒含量的增加而增加。

SiCp/AZ31B Composites Fabricated by Stir-Casting Assisted Ultrasonic Vibration

AZ31B magnesium matrix composites reinforced with micron-SiC particles of two volume fractions (5 and 10vol%) were fabricated by a stir-casting assisted ultrasonic vibration method. The as-cast ingots were extruded at 350 °C with the ratio of 12:1. The microstructure of the composites was investigated by optical microscopy (OM) and scanning electron microscope (SEM). Microstructure characterization of the composites shows the relatively uniform reinforcement distribution and obvious grain refinement. The micron-SiC particulates improve remarkably the microhardness, elastic modulus and tensile properties, which increase with more micron-SiC particulates