Influences of Doping Methods on Microstructure and Fracture Toughness of Mo-La Alloys

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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 La2O3 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 La2O3 on properties of Mo alloys was discussed by dislocation pile-up theory.

Info:

Periodical:

Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim

Pages:

1265-1268

Citation:

L. Wang et al., "Influences of Doping Methods on Microstructure and Fracture Toughness of Mo-La Alloys", Materials Science Forum, Vols. 534-536, pp. 1265-1268, 2007

Online since:

January 2007

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$38.00

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