발간논문

Home > KJMM 논문 > 발간논문

Vol.38, No.5, 699 ~ 704, 2000
Title
Pesearch Paper / Surface Treatment : A Study of the Cobalt Coating on Tungsten Carbide Powder by Hydrogen Reduction Method
안중재Jung Jae An,이종현Jong Hyeon Lee,원창환Chang Whan Won
Abstract
WC-Co composite powders were prepared by reduction of Co^(++) from ammoniacal cobalt solution on WC core by hydrogen gas at hydrothermal environment. The reduction rate and the porperties of cobalt layer were investigated by SEM, size and chemical analysis. The reduction of Co^(++) showed the maximum value when the molar ratio of NH₃/Co^(++) was 2. Optimum condition obtained in this study was reduction temperature 175℃, stirring speed 700 rpm, hydrogen partial pressure 350 psi and reduction time 45 min. Cobalt layer was continuously coated on WC particles and the prepared cobalt coated WC powder was uniformly distributed.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.