退火温度对镁合金表面Nb_(2)O_(5)涂层微观结构与性能的影响  

Effect of Annealing Temperature on Microstructure and Properties of Nb_(2)O_(5) Coating on Magnesium Alloy

作　　者：潘旭 王皓 姚泉 李文元[1] 丁泽良[1] PAN Xu;WANG Hao;YAO Quan;LI Wenyuan;DING Zeiang(College of Mechanical Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007

出　　处：《包装学报》2023年第5期15-22,共8页Packaging Journal

基　　金：湖南省自然科学基金资助项目(2023JJ50163);湖南省教育厅科学研究基金资助项目(20A159)。

摘　　要：采用直流反应溅射技术在AZ31镁合金表面制备了Nb_(2)O_(5)涂层,并在不同的温度下对涂层进行退火处理,通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、划痕仪和电化学工作站对Nb_(2)O_(5)涂层的微观形貌、晶相结构、结合性能和耐腐蚀性能进行测试与表征。研究结果表明,退火温度为100~400℃时,Nb_(2)O_(5)涂层的晶相未发生变化,且为非晶结构;而退火温度为500℃时,出现了六方晶相。随着退火温度的升高,涂层表面开裂现象加剧,涂层的结合力减小,耐腐蚀性能下降。The Nb_(2)O_(5) coating was prepared on AZ31 magnesium alloy by DC reactive sputtering technique and the coating was annealed at different temperatures.The microscopic morphology,crystal structure,bonding properties,and corrosion resistance of the Nb_(2)O_(5) coating were tested and characterized through scanning electron microscope(SEM),X-ray diffractometer(XRD),scratch tester,and electrochemical workstation.The results show that the crystalline phase of the Nb_(2)O_(5) coating remained unchanged and amorphous at annealing temperatures of 100℃ to 400℃,while the hexagonal phase appeared at annealing temperatures of 500℃.As the annealing temperature increased,the cracking phenomenon on the surface of the coating intensified,the bonding force of the layer decreased,and the corrosion resistance weakened.

关 键 词：反应溅射 氧化铌 退火 结合力 耐腐蚀性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]