Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Electrodeposition Behavior of Ni-WC Composite Coatings with Variation of WC Particle Size

WC 분말 크기에 따른 Ni-WC 복합 도금층의 특성 거동에 관한 연구

  • Kim, Dae-Geun (Department of Materials Science and Engineering, Hongik University) ;
  • Lee, Jae-Ho (Department of Materials Science and Engineering, Hongik University)
  • 김대근 (홍익대학교 신소재공학과) ;
  • 이재호 (홍익대학교 신소재공학과)
  • Published : 2006.06.30
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Abstract

The codeposition behavior of WC particles from an additive-free nickel sulfate and sulfamate solution has been investigated. Electroplating of Ni/WC composites was carried out at different current density with variation of WC particle size. The Guglielmi adsorption mechanism is applied to the electroplating of the fine WC in Ni matrix. The contents of WC in Ni composite coating were increased both by increasing current density and WC concentration in the bath. The hardness of Ni/WC composite coating at low current density is higher than that at high current density since finer WC particles dispersed through the coating. The codeposition behaviors of Co coated WC particles were also investigated. Conducting layer of particles promoted the codeposition behavior of Ni/WC-Co composite coatings.

Keywords

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