Comparison of Microstructure and Properties of In-Situ TiN- and WC-Reinforced NiCrBSi Composite Coatings Prepared by Plasma Spraying

Linlin Zhu; Jing Wang; Xianqiang Deng; Yanchun Dong; Yong Yang; Dongyang Li

doi:10.3390/ma11112182

Comparison of Microstructure and Properties of In-Situ TiN- and WC-Reinforced NiCrBSi Composite Coatings Prepared by Plasma Spraying

Materials (Basel). 2018 Nov 4;11(11):2182. doi: 10.3390/ma11112182.

Authors

Linlin Zhu¹, Jing Wang², Xianqiang Deng³, Yanchun Dong^{4

5}, Yong Yang⁶, Dongyang Li⁷

Affiliations

¹ Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China. zhulinlin608@126.com.
² Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China. wj_hebut@126.com.
³ Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China. deng228732@foxmail.com.
⁴ Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China. ycdong@hebut.edu.cn.
⁵ Department of Chemistry and Materials Engineering, University of Alberta, Edmonton, AB T6G 2L5, Canada. ycdong@hebut.edu.cn.
⁶ Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China. yangyonghebut@163.com.
⁷ Department of Chemistry and Materials Engineering, University of Alberta, Edmonton, AB T6G 2L5, Canada. dongyang@ualberta.ca.

Abstract

In this study, NiCrBSi-30 wt.% TiN composite (NTC) coating was produced on carbon steel via plasma spraying, with NiCrBSi-30 wt.% WC composite (NWC) coating as the comparison object. The microstructure and phase constituents of the composite coatings were characterized using scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) techniques, transmission electron microscopy (TEM) and x-ray diffraction (XRD). Atomic force microscopy (AFM) was used to measure electronic work functions. The microhardness and wear performance of coatings were also investigated. The average microhardness of the NTC and NWC coatings was 1000 HV and 850 HV, respectively. In addition, the NTC coating had a wear volume loss of 0.8118 mm³, less than 1.4772 mm³, the volume loss of the NWC coating. This was due to the presence of TiN in the form of nanograins in the composite coating and tighter binding to the matrix.

Keywords: NiCrBSi; TiN; WC; plasma spraying; wear resistance.