郑海忠,鲁世强,周善民

• 1:南京航空航天大学材料科学与技术学院
• 2:南昌航空大学材料科学与工程学院

摘要(Abstract)：

研究了不同热压温度和时间对Cr-33at%Nb合金显微组织及氧化行为的影响,并用SEM和X射线衍射对合金组织及氧化产物进行了分析。结果表明,热压温度升高有利于组织致密,保压时间延长有利于Laves相NbCr2热反应合成。不同热压条件制备的Cr-Nb合金在1200℃的氧化动力学均近似符合抛物线规律,氧化膜均由两部分组成,外层为Cr2O3,内层为CrNbO4。随着热压温度的升高,合金氧化速率减小;保压时间由15min延长到80min时,合金氧化速率逐渐减小,但当达到120min时,氧化速率又有所提高。

关键词(KeyWords)： Laves相NbCr2;热压参数;显微组织;氧化行为

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50474009);; 航空科学基金(05G56003);; 江西省自然科学基金(0350045)资助项目

作者(Author): 郑海忠,鲁世强,周善民

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