氧化铈对搪瓷涂层组织及摩擦磨损性能的影响

Effect of Cerium Oxide on the Microstructure and Friction and Wear Behavior of Enamel Coating

在高温钛合金表面采用电泳沉积法预置搪瓷釉料,经烧结获得搪瓷涂层.采用扫描电子显微镜、原子力显微镜及SRV- 型摩擦磨损试验机研究了普通搪瓷涂层和含CeO2搪瓷涂层的组织形貌及摩擦磨损性能.结果表明:引入CeO2可以提高瓷釉的悬浮性和流动性,使其在烧结过程中形成更加致密的组织;与此同时,CeO2可以改善搪瓷涂层的显微组织,促进硬质颗粒相的弥散分布,从而有利于降低搪瓷涂层的摩擦系数,显著提高其抗磨性能.

An enamel glaze was deposited on titanium alloys using electrophoresis technology combined with. The microstructures of commonly used enamel glaze coating and that containing cerium oxide were examined using scanning electron microscopy and atomic force microscopy. The friction and wear behavior of the enamel glaze coatings sliding against SAE52100 steel in a ball-on-disc configuration were comparatively evaluated using an SRV-III test rig. The worn surface morphologies of the coatings were analyzed using a scanning electron microscope and a surface profilometer. Results showed that the introduction of the cerium dioxide contributed to increase the suspension ability and flowability of the mixed raw materials powders and hence improve the microstructure of the sintered enamel coating. Namely, the inclusion of cerium dioxide in the enamel coating was helpful to the refining and dispersive distribution of the hard particles, which made the coating more compact and wear-resistant than the commonly used enamel coating.