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Materials 2017, 10(7), 785; doi:10.3390/ma10070785

Microstructures and Properties of Plasma Sprayed Ni Based Coatings Reinforced by TiN/C1-xNxTi Generated from In-Situ Solid-Gas Reaction

Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering Jilin University, No. 5988 Renmin Street, Changchun 130025, China
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Received: 8 June 2017 / Revised: 29 June 2017 / Accepted: 8 July 2017 / Published: 11 July 2017
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

The strengthening hard phases TiN/C1-xNxTi were generated by in-situ solid-gas reaction in Ni-based composite coatings prepared using a plasma spray welding process to reinforce the wear resistance of the coatings. The microstructures and properties of the coatings were investigated. The results showed that the coatings mainly consisted of phases such as TiN, C1-xNxTi, TiC, etc. A small amount of CrB, M7C3, and M23C6 were also detected in the coatings by micro-analysis method. Compared with the originally pure NiCrBSi coatings, the hardness of the NiCrBSi coatings reinforced by in-situ solid-gas reaction was 900 HV0.5, increased by more than 35%. Consequently, the wear resistance of the reinforced coatings was greatly improved due to the finely and uniformly dispersed hard phases mentioned above. The weight losses after wear test for the two kinds of coatings were 15 mg and 8 mg, respectively. View Full-Text
Keywords: plasma spray welding; in-situ solid-gas reaction; microstructure and property plasma spray welding; in-situ solid-gas reaction; microstructure and property
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Wang, W.; Li, W.; Xu, H. Microstructures and Properties of Plasma Sprayed Ni Based Coatings Reinforced by TiN/C1-xNxTi Generated from In-Situ Solid-Gas Reaction. Materials 2017, 10, 785.

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