INTERACTIONS BETWEEN La_(2)O_(3) PARTICLES AND DISLOCATIONS IN Mo-La_(2)O_(3) ALLOYS

作     者：J.X. Zhang D.M. Liu Y. Q. Liu M.L. Zhou T. Y. Zuo 

作者机构：The Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of Technology Beijing 100022 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2005年第18卷第6期

页      面：714-718页

核心收录：

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

基　　金：supported by the National Key Basic Research and Development Programme of China(No.G1998061316) Beijing Science Star Foundation 

主　　题：molybdenum La2O3 dislocation strengthening 

摘      要：The mechanical properties of molybdenum wires doped with different contents of La2O3 were investigated systematicaUy and the interaction between La2O3 particles with dislocations in Mo- La2O3 wires were observed by SEM and TEM. It is shown that Mo-La2O3 wires possess much higher tensile strength than the pure Mo. In wires the dislocation motion is strongly hindered by La2O3 particles, which remains up to much higher temperature. Moreover, a number of prismatic dislocation loops and hexagonal dislocation network have been formed in annealed Mo-La2O3 wires. The higher strength of Mo-LazOs than the pure Mo is attributed to the La2O3 particles dispersion strengthening and dislocation strengthening.