한국분말재료학회지 (Journal of Powder Materials)

  • 제15권2호
  • /
  • Pages.107-113
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  • 2008
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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Co 질산염과 TiO(OH)2 슬러리를 이용한 초미립 TiC-5%Co 제조 및 WC-Co 분말과의 혼합에 따른 소결체 특성

Synthesis of Ultrafine TiC-5%Co Powder by Using Co Nitrate and TiO(OH)2 Slurry and Evaluation of Sintered Materials Prepared by Mixing WC-Co

  • 홍성현 (한국기계연구원 부설 재료연구소 분말재료연구부) ;
  • 김병기 (한국기계연구원 부설 재료연구소)
  • Hong, Seong-Hyeon (Dept. of Powder Materials Research, Korea Institute of Machinery and Materials(KIMM)) ;
  • Kim, Byoung-Kee (Korea Institute of Materials Science(KIMS), Korea Institute of Machinery and Materials(KIMM))
  • 발행 : 2008.04.28
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초록

Ultrafine TiC-5%Co powders were synthesized by spray drying of aqueous solution of TiO$(OH)_2$ slurry and cobalt nitrate, followed by calcination and carbothermal reaction. The oxide powders with carbon powder was reduced and carburized at $900^{\circ}C{\sim}1250^{\circ}C$ under hydrogen atmosphere. During reduction, CO gas was mainly evolved by reducing reaction of oxides. Ultrafine TiC-5%Co powders were easily formed by carbothermal reaction at $1250^{\circ}C$ due to using ultrafine powders as raw materials. The ultrafine WC-TiC-Co alloy prepared by sintering of mixed powder of ultrafine WC-13%Co powder and ultrafine TiC-5%Co powder has higher sintered density and mechanical properties than WC-TiC-Co alloy prepared by commercial WC, TiC and Co powders.

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