Microstructure and Oxidation Performance of TiC-MoSi<sub>2</sub> Reinforced Composite Coating Prepared by Plasma Tran-sferred Arc Cladding

doi:10.12442/j.issn.1002-185X.20200446

Home > Archive>Volume 50, Issue 8, 2021 >2686-2693. DOI:10.12442/j.issn.1002-185X.20200446

Microstructure and Oxidation Performance of TiC-MoSi2 Reinforced Composite Coating Prepared by Plasma Tran-sferred Arc Cladding
DOI:
                        10.12442/j.issn.1002-185X.20200446
                    
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Affiliation:1.Materials Science and Engineering Research Center, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;2.National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science & Technology, Luoyang 471003, China
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Fund Project:Open Fund of National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology (201904); Fundamental Research Funds for the Central Universities (2019JBZ106)

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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.

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[Shi Chenxiao, Liu Yuanfu, Zhang Lele, Chen Deqiang, Zhang Zheng, 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.]
DOI：10.12442/j. issn.1002-185X.20200446

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Received:June 24,2020
Revised:September 15,2020
Adopted:September 15,2020
Online: September 07,2021
Published: August 31,2021

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