과공정 Al-Si 합금의 마모 거동과 기계적 성질에 미치는 TiC와 AlN의 영향

• Published in: 대한금속·재료학회지, 48(11) Vol. 48; no. 11; pp. 1003 - 1008
• Main Authors: 김용진, Yong Jin Kim, 박익민, Ik Min Park, 박용호, Yong Ho Park, 최진명, Jin Myung Choi, 주승환, Seung Hwan Ju
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 20.11.2010; 대한금속·재료학회
• Subjects: composites; mechanical properties; sintering; tensile test; wear; 재료공학
• ISSN: 1738-8228; 2288-8241

In this study, the effect of the reinforcement on the wear behaviour and mechanical properties of hypereutectic Al-Si alloys was investigated. The Gas atomized hypereutectic Al-20Si alloy powders were mixed with 1, 3, and 5 wt.% AlN and TiC ceramic particles and consolidated by hotpress. The Al-20Si powder has both finely dispersed primary Si phases and eutectic structures. The Al-20Si-AlN, TiC composites showed that the reinforcements were distributed along the boundary of the Al-20Si alloy. The UTS increased with increasing the AlN, TiC contents. At a lower load, with an increasing weight fraction of reinforcements, the wear rate decreased in both composites and the wear mechanism was adhesive wear. At a higher load, the shape of the debris changes the mechanism of the AlN composites to abrasive-adhesion wear and this resulted in an increase of the wear rate.