SiC_P尺寸对AZ61镁基复合材料组织和性能的影响

Influence of SiC Particles Size on Structure and Properties of AZ61 Mg-based Composites

采用高能超声法制备SiCP增强AZ61镁基复合材料。结果表明,高能超声能够使纳米级陶瓷颗粒在镁合金熔体中有效分散,所制备的复合材料抗拉强度和屈服强度等力学性能比基体有所提高。其中所用SiC颗粒粒径为100nm、5μm和20μm,在1%的添加量下复合材料可以获得较好的性能,其抗拉强度分别为321、276和260MPa,伸长率分别为13.8%、12.6%和10.6%。

The use of high-energy ultrasound to prepare SiC particulate reinforced AZ61 Mg-based composites was conducted. The results show that high-energy ultrasound can make nano-ceramic particles effectively dispersed in the magnesium alloy melt. The tensile strength and yield strength increase compared with the Mg based. The particle sizes of the SiC are 100 nm, 5 p,m and 20 μm, respectively. The composite materials adding 1% SiC can get better performance. Their tensile strength are respectively 321,276 and 206 MPa, elongations are 13.8%, 13.6% and 10.6%.