合金化元素对Nb-Si基超高温合金微观组织和性能的影响  

Effect of Alloying Elements on Microstructures and Properties of Nb-Si Based Ultra-high Temperature Alloys

作　　者：尹梦姣 孙志平[1] 李倩[1] 沈淑馨[1] 

机构地区：[1]长安大学材料科学与工程学院,陕西西安710064

出　　处：《铸造技术》2017年第8期1796-1799,1804,共5页Foundry Technology

基　　金：国家自然科学基金资助项目(51401032);中央高校基金资助项目(310831171007;310831161012);大学生创新创业训练计划项目资助(201610710229)

摘　　要：Ti、B、Al和Cr等元素对Nb-Si基合金组织和性能影响的研究和报道较多,而对Zr、Mo、W和Hf等元素的研究报道较少,这些元素的加入不仅能够优化Nb-Si基合金的微观组织,也能使合金的综合性能明显提升。系统的分析和归纳这些合金元素的加入对Nb-Si基合金组织和性能的影响,对今后Nb-Si基超高温合金的设计和应用有着重大的意义。本文重点关注了Zr、Mo、W和Hf等合金元素对Nb-Si基合金组织、力学性能和高温抗氧化性能的影响。The alloying effects of Ti, B, Al and Cr on the microstructures and properties of Nb-Si based alloys are often published, while there are less research about Zr, Mo, W and Hr. The addition of these elements not only can optimize the microstructures of Nb-Si based alloys, but also can improve the overall performances, so analyzing and summarizing the alloying effects of Zr, Mo, W and Hf have great significance for the design and application of Nb-Si alloys. Accordingly, the alloying effects of Zr, Mo, W and Hf on the microstructures, mechanical properties and high temperature oxidation resistance were focused in this paper.

关 键 词：Nb-Si基超高温合金 合金化元素 微观组织 力学性能 抗氧化性能 

分 类 号：TG132.3[一般工业技术—材料科学与工程]