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采用混合盐反应(MixedSaltReaction)原位合成法成功制备了TiB2/2014Al复合材料,并对其摩擦磨损性能进行了研究。采用X射线衍射分析物相和扫描、透射电镜观察了其微观组织。结果表明,原位生成的TiB2颗粒非常细小,尺寸小于1μm,内生TiB2颗粒分布均匀,明显细化了复合材料组织。室温干滑动摩擦磨损试验表明,复合材料耐磨性高于基体合金,基体合金磨损机制以粘着磨损为主,复合材料的磨损机制为典型的磨粒磨损。
The TiB2 / 2014Al composite was successfully prepared by in situ synthesis using Mixed Salt Reaction and its friction and wear properties were studied. X-ray diffraction analysis of the phase and scanning, transmission electron microscopy of the microstructure. The results show that the in-situ TiB2 particles are very small, the size is less than 1μm, the endogenous TiB2 particles are evenly distributed and the microstructure of the composite is obviously refined. Dry sliding friction and wear tests at room temperature show that the wear resistance of the composite is higher than that of the matrix alloy, and the wear mechanism of the matrix alloy is mainly adhesive wear. The wear mechanism of the composite is typical abrasive wear.