Microstructure and properties of in-situ TiB2 matrix composite coatings prepared by plasma spraying

作者：Han, Ya-guang; Yang, Yong^*; Wang, Lei; Chen, Xue-guang; Chu, Zhen-hua; Zhang, Xu-ning; Dong, Yan-chun; Liu, Zhe; Yan, Dian-ran; Zhang, Jian-xin; Li, Chong-gui

来源：Applied Surface Science, 2018, 431: 48-54.

DOI：10.1016/j.apsusc.2017.04.107

• TiB2 matrix composite coatings
• In-situ
• Reactive plasma spraying
• Microhardness
• Microstructure

TiB2-TiC and Ti-B4C composite powders were plasma sprayed onto the 45 steel substrates, respectively, for preparing TiB2 matrix composite coatings. The microstructure and properties of as-prepared coatings were investigated comparatively. The coating prepared by plasma spraying TiB2-TiC composite powder showed the characteristics of stacking of partially melted or unmelted feedstock particles, loose microstructure, high porosity, and poor property. For Ti-B4C system, the main phase TiB2 and TiC0.3N0.7 were formed due to the reaction between Ti and B4C during the plasma spraying process. The as-prepared coating displayed dense microstructure and better quality. The properties of the coating prepared by plasma spraying Ti-B4C composite powder were much better than that of the coating prepared by TiB2-TiC composite powder.

• 出版日期2018-2-15
• 单位河北工业大学; 上海工程技术大学