Li Wenbo, Chen Ken, Liu Lanlan, Yang Yingfei, Zhu Shenglong
State Grid Hunan Electric Power Company Limited Research Institute, 388 ShaoShan N Rd, Changsha 410000, China.
Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, 52 Wencui Rd, Shenhe District, Shenyang 110016, China.
Materials (Basel). 2020 Nov 11;13(22):5085. doi: 10.3390/ma13225085.
A SiO-AlO glass composite coating was prepared on Ti60 alloy via air spraying slurry and then a suitable baking process. It was composed of potassium silicate glass, alumina and quartz powders. The high temperature oxidation performance of the alloy with and without coating was evaluated in static air at both 800 °C and 900 °C. The results show that catastrophic oxidation occurs for Ti60 bare alloy. It had a mass gain of about 2 mg/cm after oxidation at 800 °C and 17 mg/cm at 900 °C for 100 h. On the contrary, the oxidation resistance of alloy coated with composite coating was much improved with the mass gain about 0.36 mg/cm and 0.95 mg/cm at 800 °C and at 900 °C, respectively. The microstructure evolution of the composite coating and the alloy was analyzed by scanning electron microscope and electron probe microanalyzer. The effect of the composite coating on the oxidation performance of the alloy is discussed especially in terms of oxygen diffusion and interfacial reaction.
通过空气喷涂浆料并随后进行适当的烘烤工艺，在Ti60合金上制备了SiO-AlO玻璃复合涂层。它由硅酸钾玻璃、氧化铝和石英粉组成。在800℃和900℃的静态空气中评估了有涂层和无涂层合金的高温氧化性能。结果表明，Ti60裸合金发生灾难性氧化。在800℃氧化100小时后，其质量增加约2mg/cm²，在900℃氧化100小时后，质量增加17mg/cm²。相反，复合涂层合金的抗氧化性能有很大提高，在800℃和900℃时质量增加分别约为0.36mg/cm²和0.95mg/cm²。通过扫描电子显微镜和电子探针微分析仪分析了复合涂层和合金的微观结构演变。特别从氧扩散和界面反应方面讨论了复合涂层对合金氧化性能的影响。
