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热压原位合成了(Ti,Mo)C-Ni和(Ti,W,Mo)C-Ni两种复合材料,对该复合材料的物相组成、显微组织和力学性能进行了分析。结果表明:(Ti,Mo)C-Ni复合材料中的钛、碳和钼反应完全,但(Ti,W,Mo)C-Ni复合材料中存在少量未反应完全的碳粉,可认为剩余碳粉与碳化钨粉和钛粉的反应有关;热压原位合成的碳化物颗粒较细小,尺寸为0.5～2μm;随着WC的加入,碳化物颗粒和粘结相的边界从多边形转变成近球形,且复合材料的致密度、硬度和抗弯强度都有所提高。
(Ti, Mo) C-Ni and (Ti, W, Mo) C-Ni composites were prepared by hot pressing in situ. The phase composition, microstructure and mechanical properties of the composites were analyzed. The results show that the reaction of titanium, carbon and molybdenum in (Ti, Mo) C-Ni composites is complete, but a small amount of unreacted carbon powder exists in the (Ti, W, Mo) C-Ni composites. The powder is related to the reaction of tungsten carbide powder and titanium powder. The hot-pressed in-situ carbide particles are smaller and have a size of 0.5-2 μm. With the addition of WC, the boundaries between the carbide particles and the binder phase change from polygons to Spherical, and the composite density, hardness and flexural strength have increased.