何秋梅,朱敏,曾美琴

• 1:广东水利电力职业技术学院机械工程系
• 2:华南理工大学机械工程学院

摘要(Abstract)：

运用XRD、SEM等方法研究了Al2O3在高能球磨过程中的相结构转变及其耐热性能,研究了CeO2和ZrO2添加剂对Al2O3高能球磨和焙烧过程中的组织和热稳定性的影响。结果表明,随着球磨时间的延长,Al2O3粉末不断被细化,同时也发生了部分γ-Al2O3→α-Al2O3的转变;而且,经30h球磨的Al2O3在850℃下退火处理后就全部转变成α相。然而,当添加一定量的CeO2和ZrO2后,在球磨过程中γ-Al2O3→α-Al2O3的转变得到了有效的抑制,Al2O3在焙烧过程中的相变温度也提高到了1000℃以上,即CeO2和ZrO2的添加提高了γ-Al2O3的热稳定性。

关键词(KeyWords)： Al_2O_3;高能球磨;相变;CeO_2和ZrO_2;热稳定性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 何秋梅,朱敏,曾美琴

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