Assessment of mechanical and tribological characteristics of Silicon Nitride reinforced aluminum metal matrix composites
Assessment of mechanical and tribological characteristics of Silicon Nitride reinforced aluminum metal matrix composites
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DOI：
10.1016/j.compositesb.2019.107138
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发表时间：
2019-10-15
影响因子：
13.1
通讯作者：
Rao, C. S. P.
中科院分区：
文献类型：
--
作者：
Kumar, G. B. Veeresh;Panigrahy, Pinaki Prasad;Rao, C. S. P.
本文重点研究氮化硅粉末增强Al6063合金的物理、机械和摩擦学特性。采用液体冶金技术搅拌铸造法制备了Al6063-氮化硅金属基复合材料。基体材料中增强材料的掺入量为 0 至 10 wt%，间隔为 2。所得复合材料用于与物理、机械和摩擦学实验相关的研究。测试是根据 ASTM 标准对 Al6063 合金及其复合材料进行的。测试结果可以观察到，随着增强体百分比的增加，硬度和密度等特性整体显着增加。使用销盘式摩擦磨损试验机进行干滑动磨损测试，结果表明该复合材料具有较高的耐磨性。基本上，Al6063 相对较软，并且根据飞机纵梁、上下机翼、地板梁、座椅轨道、飞机机身应用中的干滑动磨损问题，耐磨性在接触表面的相对运动中起着至关重要的作用，因此目前的工作重点是开发具有增强机械和摩擦学性能的 Al6063-氮化硅金属基复合材料。在所有组合物中，具有最高增强百分比的复合材料表现出更好的性能。利用扫描电子显微镜、能量色散显微镜图像研究了制备的复合材料在磨损试验过程中磨损前后的形貌。
The present paper focuses on the investigation of physical, mechanical and tribological characteristics of Al6063 alloy reinforced with Silicon Nitride powder. The Al6063-Silicon Nitride Metal Matrix Composites were fabricated by following stir casting method of liquid metallurgy technique. The amount of reinforcement incorporation in matrix material was from 0 to 10 wt% varied in intervals of 2. The obtained composites were used in the investigative studies related to physical, mechanical & tribological experimentations. The tests were performed on the Al6063 alloy and its composites as per in harmony with the ASTM Standards. The test results it can be observed and appreciated that increasing the reinforcement percentage, the characteristics like hardness and density increased monolithically and significantly. The dry sliding wear test is performed using pin on disc configuration tribometer and the results state that the composite has higher wear resistance. Basically the Al6063 is relatively soft and as per dry sliding wear concern at the applications of stringers, upper and lower wings of aircraft, floor breams, seat tracks, fuselage of an aircraft's, the wear resistance plays a crucial role in relative movement at contact surfaces, hence the present work focused on developing Al6063-Silicon Nitride Metal Matrix Composites with enhanced mechanical and tribological properties. Off all the compositions, the composite material having the highest percentage of reinforcement showed better properties. Scanning Electron Microscope, Energy Dispersive Microscopy images were used to study the fabricated composites before and after the wear morphology during wear test.