以钛合金为基体,Al₂O₃+13%TiO₂(质量分数)为喷涂粉末,运用激光熔覆等离子体喷涂工艺制备陶瓷涂层。采用喷砂式冲蚀试验机进行冲蚀磨损实验。采用三维视屏显微镜研究涂层磨损表面形貌。并利用X射线衍射仪(XRD)对激光熔覆前后涂层的成分进行了分析。结果表明,激光熔覆过程中,陶瓷涂层成分均一致密化,使涂层的抗冲蚀性能提高;结果也同时阐述了随着冲蚀角的增加,激光熔覆陶瓷涂层冲蚀量超过等离子体涂层的原因,提出了陶瓷涂层冲蚀涂层的经验关联式。

A ceramic coating on a matrix of titanium alloy was prepared with powdered Al₂O₃+13%TiO₂ (mass fraction) by using laser cladding of plasma-sprayed process. Erosive wear resistance of the ceramic coating was tested with an erosion-blasting machine. The worn surface of coating was observed through a three-dimensional video microscope. The coating’s composition before and after laser cladding was analyzed by X-ray diffraction (XRD). The results show that during the course of laser cladding,the composition of ceramic coating is distributed uniformly and densely,therefore enhancing the coating’s anti-erosion performance. The experimental findings explain why with erosion angle increasing,there is more weight-loss in laser cladding coating than in plasma-sprayed coating. The empirical equations of the erosion weight-loss were also obtained.