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Vol.48, No.11, 1003 ~ 1009, 2010
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| Title |
| Effect of TiC and AlN on the Wear Behavior and Mechanical Properties of Hypereutectic Al-Si Alloys |
| 김용진 Yong Jin Kim , 박익민 Ik Min Park , 박용호 Yong Ho Park , 최진명 Jin Myung Choi , 주승환 Seung Hwan Ju |
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| Abstract |
| 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. |
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| Key Words |
| composites, sintering, mechanical properties, tensile test, wear |
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