Microstructures and Properties of NiCrBSi/WC Biomimetic Coatings Prepared by Plasma Spray Welding

详细信息    查看全文

• 作者：Shiming Huang ; Daqian Sun ; Desheng Xu ; ^{xuds@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Wenquan Wang ; Hongyong Xu
• 关键词：plasma spray welding ; biomimetic coatings ; mixed powders ; microstructures ; properties
• 刊名：Journal of Bionic Engineering
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：12
• 期：4
• 页码：592-603
• 全文大小：14729 K

文摘

The NiCrBSi/WC biomimetic coatings were prepared on the low carbon steel substrate by plasma spray welding with mixed powders (WC-Co12+NiCrBSi) based on the bionic principles, and the coating characteristics were investigated. The results indicate that the coatings have a full metallurgical bond in coating/substrate interface, and consist mainly of 纬-Ni, WC, Cr₂₃C₆, Cr₇C₃, Ni₃Si, Cr₅B₃, and FeNi₃ phases. The powder composition influences the microstructures and properties of the coatings. The WC content and the hardness of coatings increase with the mass fraction of WC-Co12 powder. The biomimetic coatings have much higher wear resistance compared with the low carbon steel, which is attributed to the combination of hard WC and chromium carbide particles (bionic units) and soft 纬-Ni matrix in the coatings. It is favorable to prepare the biomimetic coating by plasma spray welding with the mixed powders (20wt%WC-Co12+80wt%NiCrBSi) for improving the wear resistance of the coating.