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

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

Synthesization of WC/Co Composite Powders Doped V and Cr by Mechanochemical Method

  • Im, Hoo-Soon (Department of Metallurgy and Materials Engineering, Hanyang University) ;
  • Hur, Jah-Mahn (Department of Metallurgy and Materials Engineering, Hanyang University) ;
  • Lee, Wan-Jae (Department of Metallurgy and Materials Engineering, Hanyang University)
  • 발행 : 2006.09.24
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Nano-sized WC particles in WC/Co composite powders were synthesized by mechanochemical method. The raw powders$(WO_3,\;Co_3O_4,\;VC,\;Cr_3C_2$ and graphite) were mixed by planetary milling for 30 hours. The compositions were WC-10 and -20 wt% Co added VC and $Cr_3C_2$. The direct reduction and carburization of the mixed powders were carried at $900\;^{\circ}C$ for 1 to 3 hours under flowing Ar gas. The mean size of WC particles in WC/Co composite powders was about 16 nm. The resultant powders were compacted and sintered at $1300{\sim}1360\;^{\circ}C$ for 0.5 hour. After sintering the mean size of WC particles was about 50 nm.

키워드