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

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

Pulsed Electric Current Sintering of Nano-crystalline Iron-base Powders

  • Li, Yuanyuan (College of Mechanical Engineering, South China University of Technology) ;
  • Long, Yan (College of Mechanical Engineering, South China University of Technology) ;
  • Li, Xiaoqiang (College of Mechanical Engineering, South China University of Technology) ;
  • Liu, Yunzhong (College of Mechanical Engineering, South China University of Technology)
  • 발행 : 2006.09.24
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A new process of pulsed electric current sintering was developed. It combines compaction with activated sintering effectively and can manufacture bulky nano-crystalline materials very quickly. A nano-structured steel is obtained with high relative density and hardness by this process. The average grain size of iron matrix is 58nm and the carbide particulate size is less than 100 nm. The densification temperature of ball-milled powders is approximately $200^{\circ}C$ lower than that of blended powders. When the sintering temperature increases, the density of as-sintered specimen increases but the hardness of as-sintered specimen first increases and then decreases.

키워드