摘要
利用热分析天平,采用动态连续称重法分别对M5和Zr-4合金在380、400℃水蒸气条件下进行氧化试验,分析其氧化动力学规律,并利用扫描电镜观察氧化层形貌。结果表明:在380、400℃水蒸气下M5和Zr-4合金的氧化动力学均符合抛物线规律,随着氧化时间的延长,氧化速度减慢,氧化温度升高,氧化速度增快。M5和Zr-4合金在380、400℃水蒸气条件下形成的氧化膜厚度的规律和氧化单位面积总增重具有很强的一致性,氧化层致密,厚度均匀,氧化层最外层生长有柱状晶。M5合金在380、400℃水蒸气条件下的抗氧化性能优于Zr-4合金。
The dynamic continuous weighing methods were used at oxidation tests for M5 and Zr-4 alloys at 380 ℃and 400 ℃ vapour. The thermal analysis balance and oxidation dynamic rules were analyzed. The microstructure of the oxidation layers were observed by SEM. The results show that oxidation dynamic is in line with parabolic rule of MS and Zr-4 at 380 ℃ and 400 ℃ steam. With the extension of oxidation time, and oxidation speed decreases. The oxidation temperature increases and then the oxidation rate increases. The thickness rule of oxidation layer agrees well with oxide mass each unit area of M5 and Zr-4 alloys at 380℃and 400 ℃ steam. The oxidation layers are density and even, and then columnar crystals grow on the oxidation outer layer. The oxidation resistant of M5 alloys are better than that of Zr-4 alloys at 380 ℃ and 400 ℃vapour.
出处
《热加工工艺》
CSCD
北大核心
2013年第6期13-15,共3页
Hot Working Technology
基金
陕西省教育厅项目(2011JM7006)
关键词
M5锆合金
ZR-4合金
高温水蒸气
氧化
M5 Zirconium alloys
Zr-4 alloys
high temperature steam
oxidation
