【摘要】 采用直流反应溅射技术在AZ31镁合金表面制备了Nb₂O₅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Nb₂O₅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，Nb₂O₅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。更多还原

【Abstract】 The Nb₂O₅ 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 Nb₂O₅ 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 Nb₂O₅ 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.更多还原