Synthesis of Nano-sized Tungsten Carbide - Cobalt Powder by Liquid Phase Method of Tungstate

Jong-Hoon Kim; Yong-Ho Park; Gook-Hyun Ha

doi:10.4150/KPMI.2011.18.4.332

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텅스텐염의 액상법을 통한 초미립 WC-Co 분말의 합성: 김종훈, 박용호, 하국현
Synthesis of Nano-sized Tungsten Carbide - Cobalt Powder by Liquid Phase Method of Tungstate: Jong-Hoon Kim, Yong-Ho Park, Gook-Hyun Ha; Journal of Korean Powder Metallurgy Institute 2011;18(4):332-339
DOI: https://doi.org/10.4150/KPMI.2011.18.4.332

¹부산대학교 재료공학부
²부산대학교 재료공학부
³한국기계연구원 부설 재료연구소
¹Pusan National University
²Pusan National University
³Korea Institute of Materials Science

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Abstract

Cemented tungsten carbide has been used in cutting tools and die materials, and is an important industrial material. When the particle size is reduced to ultrafine, the hardness and other mechanical properties are improved remarkably. Ultrafine cemented carbide with high toughness and hardness is now widely used. The objective of this study is synthesis of nanostructured WC-Co powders by liquid phase method of tungstate. The precursor powders were obtained by freezen-drying of aqueous solution of soluble salts, such as ammonium metatungstate, cobalt nitrate. the final compositions were WC-10Co. In the case of liquid phase method, it can be observed synthesis of WC-10Co. The properties of powder produced at various temperature, were estimated from the SEM, BET and C/S analyser.

Keywords: WC-Co cemented carbide;Hardmetal;

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