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中文摘要：
采用激光熔化／连续沉积工艺制备出以Cr13Ni5Si2三元金属硅化物为初生相、以γ-Ni基固溶体为连续增韧相（基体）的三元金属硅化物耐磨复合材料（Cr13Ni5Si2/γ）。在高温滑动磨损条件下测试了Cr13Ni5Si2/γ复合材料的耐磨性能随温度的变化规律，并讨论了其磨损机理。结果表明，由于Cr13Ni5Si2三元金属硅化物具有原子结合力强和硬度-温度关系反常等特点，且Cr13Ni5Si2/γ复合材料具有优良的强韧性配合，以及Cr13Ni5Si2/γ复合材料在高温磨损过程中磨损表面能够形成转移覆盖层，Cr13Ni5Si2/γ材料在高温滑动磨损条件下具有非常优异的耐磨性能，较低的磨损温度敏感性和反常的磨损-温度关系。韧性基体γ-Ni的加入使Cr13Ni5Si2i三元金属硅化物在600℃高温下滑动耐磨性能提高了3倍。
英文摘要：
A wear resistant metal silicide composite consisting of Cr13Ni5Si2 ternary metal silicide dendrites and the nickel-base solid solution （γ） matrix （Cr13Ni5Si2/γ） was designed and fabricated by the laser melting/continuous deposition process. High- temperature sliding wear resistance as a function of wear test temperature and high-temperature sliding wear mechanisms of the Cr13Ni5Si2/γ composite were studied. The results indicate that the Cr13Ni5Si2/γ composite has excellent wear resistance, low temperature-sensitivity of wear and anomalous wear-temperature dependence under high-temperature sliding wear test conditions due to the strong atomic binding forces and anomalous hardness- temperature dependence of Cr13Ni5Si2, good toughness and strength of the Cr13Ni5Si2/γ composite and the transferred cover- layer on the worn surface of the Cr13Ni5Si2/γ composite during the high- temperature sliding wear process. The wear resistance of the Cr13Ni5Si2 ternary metal silicide at 600 ℃ was improved to 4 times by adding a ductile γ-Ni matrix.
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