采用高温高压（1.5－6.5GPa，1073－1473K）方法，由Ti，C，Ni，Al四种元素粉末原料原位合成了TiC颗粒增强Ni3Al金属间化合物基复合材料，其密度大于98％理论值其中TiC颗粒尺寸为纳米级，并讨论了TiC晶粒尺寸与合成压力的关系，及对复合材料显微硬度的影响 The TiC particle reinforced Ni3Al intermetallic compound matrix composites were synthesized in-situ from the powdered Ti, C, Ni, Al powders at high temperature and high pressure (1.5-6.5GPa, 1073-1473K) and the density was more than 98% The TiC particle size is nanometer, and the relationship between TiC grain size and synthesis pressure and the effect on the microhardness of TiC