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石晨晓,刘元富,张乐乐,陈德强,张政,刘志宏.转移等离子弧熔敷TiC-MoSi2 增强复合涂层显微组织及抗氧化性[J].稀有金属材料与工程(英文),2021,50(8):2686~2693.[Shi Chenxiao,Liu Yuanfu,Zhang Lele,Chen Deqiang,Zhang Zheng and Liu Zhihong.Microstructure and Oxidation Performance of TiC-MoSi2 Reinforced Composite Coating Prepared by Plasma Tran-sferred Arc Cladding[J].Rare Metal Materials and Engineering,2021,50(8):2686~2693.]
Microstructure and Oxidation Performance of TiC-MoSi2 Reinforced Composite Coating Prepared by Plasma Tran-sferred Arc Cladding
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Received:June 24, 2020  
DOI:
Key words: composite coating  microstructure  isothermal oxidation  synergistic strengthening
Foundation item:The Open Fund of National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology (201904) and the Fundamental Research Funds for the Central Universities (2019JBZ106)
Author NameAffiliation
Shi Chenxiao,Liu Yuanfu,Zhang Lele,Chen Deqiang,Zhang Zheng and Liu Zhihong  
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Abstract:
      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.