Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (40권2호 63-69)

Microstructure and Properties of Ni-SiC Composite Coating Layers Formed using Nano-sized SiC Particles

SiC 나노입자를 이용하여 형성한 Ni-SiC 복합도금막의 미세구조 및 특성

이홍기;손성호;이호영;전준미;
Lee, Hong-Kee;Son, Seong-Ho;Lee, Ho-Young;Jeon, Jun-Mi;

한국생산기술연구원 나노표면기술팀;
Nano-surface Technology Team, Division of Production Technology, Korea Institute of Industrial Technology;

DOI : 10.5695/JKISE.2007.40.2.063

Abstract

Ni-SiC composite coating layers were formed using two kinds of SiC nano-particles by DC electrodeposition in a nickel sulfamate bath containing SiC particles. The effect of stirring rate and SiC particle type on the microstructure and properties of Ni-SiC composite coating layers were investigated. Results revealed that the trend of deposition rate is closely related to the codeposition of SiC and the deposition rate. or nickel, and the codeposition behavior of SiC can be explained by using hydrodynamic effect due to stirring. The average roughness and friction coefficient are closely related to the codeposition of SiC and SiC particle size. It was found that the Victors microhardness of the composite coating layers increased with increasing codeposition of SiC. The composite coating layers containing smaller SiC particle showed higher hardness. This can be explained by using the strengthening mechanism resulting from dispersion hardening. Anti-wear property of the composite coating layers formed using 130 nm-sized SiC nano-particles has been improved by 2,300% compared with pure electroplated-nickel layer.

Keywords

SiC;Nickel;Nano;Particle;Composite;Electroplating;