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采用等离子喷涂工艺在Ti40基体表面制备厚0.2~0.4mm的阻燃涂层,并利用光学和扫描电子显微镜对钛合金基体和阻燃涂层的显微结构、截面形貌进行表征,开展了钛合金和阻燃涂层在600℃下的抗氧化性能试验研究。结果表明:涂覆阻燃涂层的钛合金试样在600℃静态空气中连续氧化100h后,其氧化增重减少76%以上,氧化速率降低92%,抗高温氧化性能提高12倍;同时,SEM观察结果显示高温氧化后阻燃涂层仍保持完好,说明该涂层与试样的结合性能以及涂层的抗氧化性能较好,适应于航空发动机防钛火阻燃涂层。
The flame-retardant coatings with a thickness of 0.2 ~ 0.4mm were prepared on the surface of Ti40 by plasma spray process. The microstructure and cross-sectional morphology of the titanium alloy matrix and flame-retardant coatings were characterized by optical and scanning electron microscope. Experimental Study on Antioxidation Performance of Alloy and Flame Retardant Coating at. The results show that the oxidation resistance and weight loss of titanium alloy coated with flame retardant coating decrease more than 76% and oxidation rate by 92% and 12 times respectively at 600 ℃ in static air for 100h. At the same time, The results of SEM showed that the flame-retardant coating remained intact after high temperature oxidation, indicating that the combination of the coating and the sample and the oxidation resistance of the coating were better, and the flame-retardant coating adapted to the anti-titanium flame of the aero-engine.