热喷涂制备氧化钛复合涂层研究现状
Research status of TiO2 composite coatings prepared by thermal spraying
吴海东 1燕玉林 2崔方方 1丛孟启 1高祥涵 1楚佳杰 1韩冰源1
作者信息
- 1. 江苏理工学院 汽车与交通工程学院,江苏 常州 213001
- 2. 军事科学院 战略评估咨询中心,北京 100091
- 折叠
摘要
氧化钛复合涂层具有优异的耐磨、耐腐蚀性能,常用于关键机械零部件的表面防护.根据国内外相关文献,总结了喷涂工艺和喷涂参数对涂层综合服役性能、力学性能的影响;阐述了氧化钛复合粉体制备方式与涂层质量的关系,分析了氧化钛(TiO2)与氧化物(Al2O3、Cr2O3、ZrO2)、碳(CNT、GN)及碳化物(SiC、WC)等复合后对涂层综合性能提升的影响.得出如下结论:TiO2颗粒在喷涂过程中可以抑制α-Al2O3向γ-Al2O3的转变,从而提升涂层耐磨耐腐蚀性能;TiO2可以细化涂层晶粒使涂层韧性提升,并减少因应力集中而引起的微裂纹;TiO2熔点较低,受热后熔融充分,可以起到封孔作用,从而提升涂层致密性、降低孔隙率.针对氧化钛复合涂层的性能特点,对涂层性能提升的发展方向进行了探讨.
Abstract
Titanium oxide(TiO2)composite coating has excellent wear resistance and corrosion resistance,which is often used for surface protection of key mechanical parts.According to the relevant literature at home and abroad,the effects of spraying process and spraying parameters on the comprehensive service performance and mechanical properties of the coating are summarized.The relationship between the preparation method of titani-um oxide composite powder and the quality of the coating is described,and the effects of TiO2,oxides(Al2O3,Cr2O3,ZrO2),carbon(CNT,GN),and carbides(SiC,WC)on the comprehensive performance of the coating are analyzed.We draw some conclusions a as follows.First,TiO2 particles can inhibit the transformation of α-Al2O3 to γ-Al2O3 during spraying,thus improving the wear and corrosion resistance of the coating.Second,TiO2 can re-fine the coating grains to improve the toughness of the coating and reduce the microcracks caused by stress con-centration.Third,TiO2 has a low melting point and is fully melted after heating,which can play a role in sealing pores,thereby improving the compactness of the coating and reducing the porosity.According to the performance characteristics of titanium oxide composite coating,the development direction of coating performance improve-ment was discussed.
关键词
表面技术/等离子喷涂/陶瓷涂层/氧化钛/摩擦磨损Key words
surface technology/plasma spraying/ceramic coating/TiO2/frictional wear引用本文复制引用
基金项目
江苏省自然科学基金项目(BK20191036)
出版年
2024
NETL
NSTL
万方数据