Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (35권3호 158-164)

Effect of Pulse Plating on Hardness of Brass-Alumina Nanocomposite

펄스전류인가가 황동-알루미나 나노복합도금층의 경도에 미치는 영향

오영주;안재우;안종관;이만승;

한국과학기술연구원 금속공정연구센터;대진대학교 공과대학 신소재공학과;한국지질자원연구원 자원활용연구부;목포대학교 공과대학 신소재공학과;

Abstract

Nanocomposites consisting of a nanocrystalline brass matrix (grain size ; 20-100nm) with sub-micron sized Al2O3 particles (60-200nm) were prepared by pulsed current electrodeposition. The microhardness of the nanocomposite with a grain size of 90-100nm was approximately 1.7 times higher than that of a comparable electrodeposit with no particles. However, significant variations in microhardness were not observed between the nanocomposites with grain sizes of 20 nm and the comparable electrodeposit.

Keywords

Brass-alumina;hardness;Orowan particle strengthening;Hall-Petch relationship;pulsed current electrodeposition;