Mo-La_2O_3烧结坯的韧化机制研究

Study on Toughening Mechanism of Mo-La_2O_3 Sintered Bars

通过扫描电镜、定点探针分析、X射线衍射分析及俄歇电子能谱分析研究了Mo La2 O3 烧结坯的韧化机制。结果表明 :La2 O3 的加入提高了烧结钼坯的横向断裂强度和韧性 ;Mo La2 O3 烧结坯的韧化机制源于间隙杂质在La2 O3

The toughening mechanism of Mo La 2O 3 sintered bars has been investigated systematically by SEM, EDAX, X ray diffraction and AES. It was shown that the transverse rupture strength and ductility of the sintered Mo bars were improved greatly by the addition of La 2O 3. The toughening mechanism of Mo La 2O 3 is segregation of impurities to the surface of La 2O 3 particles.