Nb-Si基超高温合金研究进展  

Research Progress in Ultrahigh Temperature Nb-Si Based Alloys

作　　者：韩国明 李飞[1] 孙宝德[1,2] Han Guoming1, Li Fei1, Sun Baode1,2(1.School of Materials Science and Engineering, Shanghai Jiaotong University; 2.The State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong Universit)

机构地区：[1]上海交通大学材料科学与工程学院 [2]上海交通大学金属基复合材料国家重点试验室

出　　处：《特种铸造及有色合金》2018年第10期1071-1075,共5页Special Casting & Nonferrous Alloys

摘　　要：Nb-Si基超高温合金具有高熔点、低密度和良好的高温力学性能,目标使用温度达到1 200~1 450℃,有望成为新一代高推重比航空发动机热端部件最有潜力的候选材料。综述了该合金的成分设计、组织调控、性能表征及其加工制备技术,重点介绍了该合金成分-组织-性能之间的关联,探讨了定向凝固技术制备Nb-Si合金涡轮叶片存在的问题。With higher melting point,relatively lower densities and attractive high temperature strength,Nb-Si based ultrahigh temperature alloys show great promise for application as the next generation turbine airfoil materials with the operating temperature of 1 200-1 450℃.The composition design,microstructure regulation,characterization and processing technologies were reviewed,focusing on the relationship among compositions,microstructure and properties.The shortcoming of directionally solidified Nb-Si based superalloys was expounded.

关 键 词：Nb-Si基超高温合金 成分设计 组织调控 定向凝固 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG146.416[金属学及工艺—合金]