研究了Ｎｉ－ＳｉＣ复合镀膜ＳｉＣ粒子与Ｎｉ基质的高温界面反应及其对耐磨性的影响，６００℃等温，ＳｉＣ粒子只发生部分反应，首先生成过渡相Ｎｉ_５Ｓｉ_２，后为Ｎｉ_３Ｓｉ取代，形成ＳｉＣ－Ｎｉ_３Ｓｉ－ｃ膜－Ｎｉ的复合体。高温下ＳｉＣ完全分解，碳膜增厚，并生成高Ｓｉ－Ｎｉ值化合物。复合镀膜的耐磨性为高温反应所控制。 The interfacial reaction between SiC particles and Ni matrix on Ni-SiC composite coating and its effect on wear resistance were investigated. At 600 ℃ isothermal, the SiC particles only partially reacted, Ni_5Si_2 phase was firstly formed and Ni_3Si was substituted later, forming SiC- Ni_3Si-c membrane-Ni complex. SiC is completely decomposed at high temperatures, the carbon film is thickened, and high Si-Ni compounds are formed. The wear resistance of the composite coating is controlled by the high temperature reaction.