2復(fù)合相增強(qiáng)復(fù)合涂層。對(duì)比分析了氧化前后復(fù)合涂層的顯微組織，測(cè)試了復(fù)合涂層的顯微硬度分布，測(cè)試并擬合了復(fù)合涂層的氧化動(dòng)力學(xué)曲線，探討了復(fù)合涂層的氧化機(jī)理。結(jié)果表明：復(fù)合涂層典型顯微組織由TiC-MoSi2復(fù)合相、初生TiC枝晶和γ-(Ni,Fe)/NiSi2共晶構(gòu)成，TiC-MoSi2復(fù)合相和初生TiC枝晶作為復(fù)合涂層的增強(qiáng)相均勻分布在γ-(Ni,Fe)/NiSi2共晶基體上。由于TiC-MoSi2復(fù)合相的增強(qiáng)作用以及超細(xì)γ-(Ni,Fe)/NiSi2共晶基體的粘結(jié)和支撐作用，復(fù)合涂層具有高且均勻的硬度分布、良好的強(qiáng)度和韌性。得益于獨(dú)特的顯微組織，復(fù)合涂層表現(xiàn)出良好的高溫抗氧化性。;In order to improve the oxidation resistance and wear properties of AISI 304, a TiC-MoSi2 complex phase enhanced composite coating was designed and in-situ prepared on AISI 304 substrate by plasma transferred arc (PTA) cladding technique. Microstructure of the composite coating before and after oxidation was analyzed. The hardness distribution of the coating was tested. The oxidation kinetics curves of the coating were measured and fitted. The oxidation mechanism of the coating was discussed. Results show that typical microstructure of the composite coating consists of TiC-MoSi2 complex phases, primary TiC dendrites and γ-(Ni, Fe)/NiSi2 eutectics. The TiC-MoSi2 complex phases and TiC dendrites as reinforcing phases are uniformly distributed on the γ-(Ni, Fe)/NiSi2 eutectic matrix. Due to the strengthening effect of the TiC-MoSi2 complex phases and the binding and supporting action of the ultrafine γ-(Ni,Fe)/NiSi2 eutectic matrix, the composite coating exhibits high and uniform hardness distribution, good strength and toughness. Thanks to its unique microstructure, the composite coating shows good oxidation resistance."/>