摘要
研究了Ti600合金在600~750℃下的高温氧化行为。采用连续氧化增重的方法及氧化速度常数、氧化活度等理论计算了合金氧化的热力学和动力学规律;用XRD、SEM、EDS等手段研究保护膜的表面相结构和表面形貌以及截面元素分布。结果表明：Ti600合金在700℃以下均有较好的抗氧化性能,其连续氧化动力学曲线基本符合抛物线规律;在750℃,氧化较严重,其连续氧化动力学曲线近似符合抛物线-直线规律。氧化层由金红石型的TiO2氧化物和少量的Al2O3组成。Al2O3能阻止氧的渗入,降低氧化速度。
The oxidation behavior of Ti600 alloy at high temperature was investigated. Thermodynamic and dynamic laws were studied by means of calculating the oxidation mass gain, oxidation rate constants and activities. The phase structure and morphology of oxidation scales on surface were examined with XRD and SEM. The element distribution profile along cross-section of the oxidation layer was studied by EDS to understand the diffusion behavior. The results indicate that Ti600 alloy exhibits the parabolic rule of oxidation rate at 600-700℃, but obeys the parabolic-linear rule at 750 ℃. The oxidation scales are composed of TiO2 and Al2O3
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第7期1226-1230,共5页
Rare Metal Materials and Engineering
基金
国家科技支撑计划(2007BAE07B01)
国家"973"计划(2007CB613807)
关键词
TI600合金
高温氧化
氧化层
Ti600 alloy
oxidation at high temperature
oxidation layer
