한국분말야금학회:학술대회논문집 (Proceedings of the Korean Powder Metallurgy Institute Conference)

한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
권호 표지

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

  • Wang, Lin (17th Floor of Jie Rui Mansion, No.208 West Section of The Second South Ring Road, Xi'an) ;
  • Sun, Yuanjun (17th Floor of Jie Rui Mansion, No.208 West Section of The Second South Ring Road, Xi'an) ;
  • Luo, Jianhai (17th Floor of Jie Rui Mansion, No.208 West Section of The Second South Ring Road, Xi'an) ;
  • Zhu, Yongan (17th Floor of Jie Rui Mansion, No.208 West Section of The Second South Ring Road, Xi'an) ;
  • Niu, Pingwen (17th Floor of Jie Rui Mansion, No.208 West Section of The Second South Ring Road, Xi'an)
  • 발행 : 2006.09.24
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초록

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.

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