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采用料浆法在钼基体上制备ZrO2和SnO2玻璃基抗氧化涂层。通过XRD分析涂层的物相结构,运用SEM观察涂层的显微形貌,同时测试了涂层在800℃高温下的抗氧化性能。结果表明,ZrO2和SnO2玻璃基涂层中分别有BaZrSi3O9和BaSnSi3O9相生成,这两种物质均具有抗氧化性质,使得涂层在一定时间内不易被氧化。在空气中经过2h高温氧化后,ZrO2玻璃基涂层中仅存在ZrSiO4相,而SnO2玻璃基涂层中则出现了BaMo2O7和BaMo2O7相,使得涂层重量增加。ZrO2玻璃基涂层的氧化增重曲线较平缓,且增重先增加后逐渐减少,而SnO2玻璃基涂层的氧化增重持续增加。
ZrO2 and SnO2 glass-based anti-oxidation coatings were prepared on the molybdenum substrate by slurry method. The phase structure of the coating was analyzed by XRD. The microstructure of the coating was observed by SEM. The oxidation resistance of the coating at 800 ℃ was also tested. The results show that BaZrSi3O9 and BaSnSi3O9 phases are formed in ZrO2 and SnO2 glass-based coatings, respectively. Both of these materials have anti-oxidation properties, which make the coating less susceptible to oxidation in a certain period of time. After 2 hours of high temperature oxidation in the air, only ZrSiO4 phase exists in the ZrO2 glass-based coating, while BaMo2O7 and BaMo2O7 phases appear in the SnO2 glass-based coating, resulting in an increase in coating weight. The oxidation weight gain curve of ZrO2 glass-based coating is gentle, and the weight gain first increases and then decreases, while the oxidation weight gain of SnO2 glass-based coating continues to increase.