等离子喷涂制备的原位TiN和WC增强NiCrBSi复合涂层的微观结构与性能比较

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

作者信息

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

机构信息

Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.

Department of Chemistry and Materials Engineering, University of Alberta, Edmonton, AB T6G 2L5, Canada.

出版信息

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

DOI:10.3390/ma11112182

PMID:30400366

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6266176/

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.

摘要

在本研究中，通过等离子喷涂在碳钢上制备了NiCrBSi-30 wt.% TiN复合（NTC）涂层，并以NiCrBSi-30 wt.% WC复合（NWC）涂层作为对比对象。采用扫描电子显微镜（SEM）结合能谱（EDS）技术、透射电子显微镜（TEM）和X射线衍射（XRD）对复合涂层的微观结构和相组成进行了表征。利用原子力显微镜（AFM）测量电子功函数。还研究了涂层的显微硬度和磨损性能。NTC涂层和NWC涂层的平均显微硬度分别为1000 HV和850 HV。此外，NTC涂层的磨损体积损失为0.8118 mm³，小于NWC涂层的1.4772 mm³体积损失。这是由于复合涂层中存在纳米颗粒形式的TiN且与基体结合更紧密。