摘要
采用金相试验、扫描电镜试验、热震试验和显微硬度试验对不同激光重熔工艺下的Y2O3部分稳定ZrO2纳米陶瓷涂层组织与性能进行研究.重点分析了涂层重熔宽度与深度、表面形貌、显微硬度和热震性能随激光比能量的变化规律.结果表明,ZrO2纳米陶瓷涂层的重熔深度和宽度随着激光比能量的增大而增加;涂层的表面成形与激光比能量密切相关;涂层的显微硬度随激光比能量的增大而升高;激光比能量对涂层热震性能的影响十分明显,当激光比能量为37.2 J/mm2时重熔涂层的热震性能最好.
The nanostructured ZrO2 laser glazed coating was produced with different glazing processing parameters.Experiments were done to investigate the microstructure and properties.The investigation methods include optical and scan electron microscopy test,microhardness test and thermal shock test.In addition,the change rules of microstructure and properties were discussed.The results show that the depth,width and microhardness of the coating increase with the laser specific energy being increased.Microstructure test and thermal shock test show that the surface morphology and thermal shock resistance of the coating have relation to the laser specific energy.When the specific energy is about 37.2 J/mm2,the laser glazed coating exhibits the best thermal shock resistance.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第5期37-41,共5页
Transactions of The China Welding Institution
关键词
纳米氧化锆涂层
激光重熔
比能量
表面形貌
热震性能
nanostructured ZrO2 coating
laser glazing
specific energy
surface morphology
thermal shock resistance
