采用激光熔炼技术制备出镍基固溶体γ与Mo2Ni3Si三元金属硅化物双相合金,其显微组织由Mo2Ni3Si初生枝晶及枝晶间以γ相为主的γ/Mo2Ni3Si共晶组成.室温干滑动磨损实验表明,由于高硬度Mo2Ni3Si(hp12 Lave8相)及强韧性基体γ相的牢固结合,Mo2Ni3Si/γ双相合金具有十分优异的耐磨性能,其磨损机理是硬度较低的γ/Mo2Ni3Si共晶组织被优先磨损;凸出于磨损表面的部分Mo2Ni3Si初生相失去了共晶的支撑而发生开裂及剥落;另一方面,Mo2Ni3Si初生相保护基体免于严重磨损,其磨损速率最终控制合金的总磨损速率.
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