摘要
在实验中运用放电等离子烧结技术制备TiC/7075铝基复合材料,并分析了不同TiC含量的TiC/7075烧结块体的组织结构和力学性能。采用球磨工艺混合7075合金粉和TiC粉末,在500℃下烧结制备TiC/7075铝基复合材料;利用XRD、SEM、EDS、HVS-1000分析烧结块体的物相、微观组织、维氏硬度。研究发现,烧结制备的TiC/7075铝基复合材料中只有Al和TiC相,没有新相形成; TiC在基体材料中分布均匀,制备的烧结块体致密度高达98%,其维氏硬度随着TiC含量的增加而增加。
In this paper,TiC/7075 aluminum matrix composites prepared by spark plasma sintering are studied,and the microstructure and mechanical properties of different TiC contents sintering blocks are analyzed. Ball milling process is used to mix 7075 alloy powder and TiC powder; then,TiC/7075 aluminum matrix composites are prepared by the mixed powder sintered at 500 ℃. The phases,microstructure and Vickers hardness of the sintered bulk are studied by XRD,SEM,EDS and HVS-1000. It is found that there are Al and TiC phases in the sintered TiC/7075 Al matrix composites with no new phases. The TiC particles are evenly distributed in the matrix materials and the sintered bulk has high density of 98%. The Vickers hardness of the composites increases with the TiC content increasing.
引文
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