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首页> 外文会议>Powder Metallurgy World Congress amp; Exhibition(PM 2006); 20060924-28; Busan(KR) >Influences of Doping Methods on Microstructure and Fracture Toughness of Mo-La Alloys
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Influences of Doping Methods on Microstructure and Fracture Toughness of Mo-La Alloys

机译：掺杂方式对Mo-La合金显微组织和断裂韧性的影响

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摘要

Lanthanum oxide was introduced to molybdenum powder by liquid-liquid doping and liquid-solid doping respectively. Mo alloys were prepared by powder metallurgy technology. The size distribution and feature of dopant particles and the fractographs of Mo alloys were investigated by TEM and SEM respectively. The results indicated that liquid-liquid doping method is favorable for refining and dispersing La_2O_3 particles uniformly in matrix. Fracture toughness of Mo alloys prepared by liquid-liquid doping showed better results than that of liquid-solid doping. Furthermore, the influences of the size distribution of La_2O_3 on properties of Mo alloys was discussed by dislocation pile-up theory.
机译：通过液-液掺杂和液-固掺杂将氧化镧引入钼粉。钼合金是通过粉末冶金技术制备的。分别用TEM和SEM研究了Mo合金的掺杂颗粒尺寸分布和特征，以及Mo合金的形貌。结果表明，液-液掺杂方法有利于La_2O_3颗粒在基体中的均匀分散和细化。通过液-液掺杂制备的Mo合金的断裂韧性显示出比液-固掺杂更好的断裂韧性。此外，利用位错堆积理论探讨了La_2O_3的尺寸分布对Mo合金性能的影响。

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