摘要
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-glass or SnO2-glass oxidation resistant coating was prepared on molybdenum substrate with the slurry method. Phase composition and microstructure of the coating were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）,respectively. The oxidation resistance at 800 ℃ of the coating was also tested. The results show that there are BaZrSi3O9 phase and BaSnSi3O9 phase respectively in ZrO2-glass coating and SnO2-glass coating,and both the two phases have oxidation resistance to protect the coating from oxidation within a certain time. After 2 h high temperature oxidization in air, ZrO2-glass coating is only consisted of ZrSiO4, and SnO2-glass coating contains BaMo2O7 and BaMo2O7 resulting in coating weight gain. The oxidation weight gain curve of ZrO2-glass coating changes more gently and its weight gain increases at first and then gradually decreases, while the weight gain of SnO2-glass coating always increases.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2014年第5期51-54,59,共5页
Rare Metals and Cemented Carbides
