Microstructure and mechanical properties of Ni-P coated Si3N4 reinforced Al6061 composites
Microstructure and mechanical properties of Ni-P coated Si3N4 reinforced Al6061 composites
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DOI：
10.1016/j.msea.2008.10.012
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发表时间：
2009-02-25
期刊：
影响因子：
6.4
通讯作者：
Ahmed, Abrar
中科院分区：
文献类型：
--
作者：
Ramesh, C. S.;Keshavamurthy, R.;Ahmed, Abrar
氮化硅具有较高的热硬度和良好的耐磨性、耐腐蚀性，是目前发展轻质合金复合材料的首选增强体。然而，关于搅拌铸造技术制备铝合金-氮化硅复合材料的研究资料却很少。这种金属基复合材料(MMC)的加工工艺特别是陶瓷增强体在基体合金中的润湿性很差。为了克服这一问题，研究人员目前正专注于使用金属涂层陶瓷增强材料。有鉴于此，本文讨论了搅拌铸造法制备Ni-P涂层氮化硅增强Al6061复合材料的研究进展，并对所研制的复合材料进行了X射线衍射、金相、能谱分析、显微硬度和拉伸强度测试。最大质量分数为10wt%的Ni-P涂层氮化硅均匀地分散在基体合金中。显微硬度和抗拉强度都有了显著的提高。(C)2008爱思唯尔B.V.保留所有权利
Silicon nitride is currently a popular choice as reinforcement to develop light alloy composites owing to its high hot hardness and excellent wear and corrosion resistance. However, meager information is available as regards the development of aluminum alloy-silicon nitride composites by stir cast technique. This route of processing metal matrix composites (MMCs) poses challenges in particular, poor wettability of the ceramic reinforcement in the matrix alloy. To overcome this problem, researchers are currently focusing on use of metallic coated ceramic reinforcement. In the light of the above, this paper discusses the development of Ni-P coated silicon nitride reinforced Al6061 composites by stir cast method.XRD, metallographic, EDAX studies, microhardness, and tensile strength tests of the developed composites have been carried out. A maximum of 10 wt% of Ni-P coated silicon nitride has been dispersed uniformly in the matrix alloy. A drastic improvement in both microhardness and tensile strength is observed. (C) 2008 Elsevier B.V. All rights reserved