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采用反应热压烧结法制备了TaC/Ti3SiC2复合材料,借助XRD、SEM、能谱仪以及热重分析等,研究了TaC含量对TaC/Ti3SiC2复合材料的相组成、显微结构、力学性能和抗氧化性的影响。结果表明:采用反应热压烧结法可以制备出致密的TaC/Ti3SiC2复合材料,该复合材料的主晶相为Ti3SiC2和TaTiC2,还含有少量的TiC;随着TaC含量的增加,TaC/Ti3SiC2复合材料的弯曲强度和断裂韧性呈现先增大后降低的变化趋势,当TaC含量为30wt%时,二者均达到最大值,此时弯曲强度为404MPa,断裂韧性为4.10MPa·m1/2;TaC的引入,使TaC/Ti3SiC2复合材料抗氧化性能明显优于Ti3SiC2材料。
The TaC / Ti3SiC2 composites were prepared by reaction hot pressing sintering method. The phase composition, microstructure, mechanical properties and resistance of TaC / Ti3SiC2 composites were studied by means of XRD, SEM, EDS and TG analysis. Oxidation effects. The results show that the dense TaC / Ti3SiC2 composites can be prepared by reactive hot-pressing sintering. The main crystalline phases of the composites are Ti3SiC2 and TaTiC2 and a small amount of TiC. With the increase of TaC content, the TaC / Ti3SiC2 composites Flexural strength and fracture toughness increase first and then decrease. When the content of TaC is 30wt%, both of them reach the maximum value, flexural strength is 404MPa and fracture toughness is 4.10MPa · m1 / 2. The introduction of TaC / Ti3SiC2 composite material significantly improved the oxidation resistance of Ti3SiC2 material.