摘要
研究了不同ＴｉＢ２含量的Ａｌ２Ｏ３／ＴｉＢ２陶瓷材料的高温氧化行为．用ＸＲＤ和ＳＥＭ分析材料氧化后的相组成及显微结构，探讨了该材料的氧化机理和氧化膜的破坏方式．结果表明，不同ＴｉＢ２含量的Ａｌ２Ｏ３／ＴｉＢ２陶瓷材料在１４００℃空气中氧化３０ｈ的氧化增重符合抛物线规律。随ＴｉＢ２含量的增加，材料的氧化活化能降低，氧化后的强度损失率增大。
The isothermal oxidation behavior of Al2O3/TiB2 composites with different TiB2 contents was studied.Phase composition and microstructure of oxidized specimens were investigated by XRD and SEM.It was found that this ceramic composite was oxidized in a parabolic manner for weight gain curves when exposure to air temperature range form 1100℃ to 1400℃.The activation energy decreased as the TiB2 contents increased The higher the TiB2 contents the more the flexure strength reduction.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
1996年第2期56-61,共6页
Materials Science and Technology
