Effect of Alloying on the Microstructure and Fracture Toughness of Nb-Mo-Si Alloys

作     者：Wei Qiang Li Yang Zheng Lijing Ma Chaoli Li Huanxi 

作者机构：Beijing University of Aeronautics and Astronautics Beijing 100083 China 

出 版 物：《稀有金属材料与工程》 (Rare Metal Materials and Engineering)

年 卷 期：2009年第38卷第A3期

页      面：58-61页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Supported by the Aviation Science Foundation of China (Grant No 200601104) 

主　　题：共晶层状结构 铌钼硅合金 物理性能 结构分析 

摘      要：It was found that typical Nbss /Nb5Si3 eutectic lamellar structure formed in the Nb-Mo-Si alloy. The interface between Nbss and Nb5Si3 phases was so strong that the alloy fractured mainly in the cleavage mode. In this paper, the fourth element was added with the aim of modifying interface structure. The microstructural characterization and the fracture toughness of Nb-17Si-10Mo ternary alloy doped with Ga, In, Zn and V, respectively, were investigated. It was revealed that the lamellar structure maintained with the addition of Ga and In, whereas it changed slightly with Zn and V additions. Moreover, a little increase in fracture toughness of Nb-17Si-10Mo ternary alloy was obtained through the addition of Ga and Zn.