等离子喷涂制备Co基TiC金属陶瓷涂层的微观形貌及耐高温腐蚀性能
Microstructure and High-Temperature Corrosion Resistance of Co-based TiC Cermet Coating Prepared by Plasma Spraying
摘 要
采用等离子喷涂技术在GH586合金表面制备了一层Co基TiC金属陶瓷涂层。研究了TiC含量对Co基TiC金属陶瓷涂层显微组织及耐高温腐蚀性能的影响。结果表明：TiC陶瓷颗粒与Co基粉体有良好的润湿性，呈现相互包裹的结构，涂层结合紧密无缺陷；TiC的加入，提高了Co基TiC金属陶瓷涂层的耐磨性，但当TiC含量过高时，团聚现象严重，导致涂层的耐高温腐蚀性能降低；TiC质量分数为10%时，TiC颗粒在涂层中分布较为均匀，此时涂层的耐高温腐蚀性能和耐磨性都较优。
金属陶瓷涂层
TiC
耐高温腐蚀性能
plasma spraying
cermet coating
TiC
high-temperature corrosion resistance
Abstract
A Co-based TiC cermet coating on the sarface of GH586 alloy was prepared by plasma spray. The influence of TiC content on the microstructure and high-temperature corrosion resistance of the coating was investigated. The results showe that TiC ceramic particles had good wettability with Co powder. A microstructure of TiC particles and Co powder wrapping with each other formed and the coating was tightly bound to the substrate without defects. Addition of TiC in the Co-based alloy powder improved the abrasion resistance of the coating. However, the agglomeration became serious when the content of TiC was overhigh, which reduced the high-temperature corrosion resistance of the coating. The coating with 10% (mass) TiC showed excellent high-temperature corrosion resistance and abrasion resistance because TiC particles were evenly distributed in the coating.
中图分类号 TG174 DOI 10.11973/fsyfh-201706002
所属栏目 试验研究
基金项目 江苏省高校自然科学基金（16KJB430035）；南通市科技项目（GY12015032）
收稿日期 2015/11/24
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引用该论文: CAO Jiangdong,LIU Wei. Microstructure and High-Temperature Corrosion Resistance of Co-based TiC Cermet Coating Prepared by Plasma Spraying[J]. Corrosion & Protection, 2017, 38(6): 416
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【6】BROOKES K A. 世界硬质合金指南手册[M]. 株洲硬质合金厂情报科,译. 株洲:株洲硬质合金厂,1982:3-35.
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【9】CLARK E B. Extending the application areas for titanium-carbonitride cermets[J]. International Journal of Refractory Metals and Hard Materials,1995,13:313-319.
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