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Microstructural and tribological characteristics of AA6351/Si3N4 composites manufactured by stir casting
Journal of Materials Research and Technology ( IF 6.2 ) Pub Date : 2020-10-14 , DOI: 10.1016/j.jmrt.2020.09.128
V. Mohanavel , K.S. Ashraff Ali , S. Prasath , T. Sathish , M. Ravichandran

In the current research study, AA6351 (Al-Si-Mg) is employed as matrix material and silicon nitride (Si3N4) particles as reinforcement material to manufacture the aluminum composites (AMCs). AA6351 matrix composites incorporated with several weight fractions of Si3N4 (0, 1, 2 and 3 wt.%) were synthesized via stir casting technique. The obtained composites were characterized through a scanning electron microscope (SEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDS). EDS and XRD spectrums demonstrate the presence of Si3N4 reinforcement contents in the manufactured AMCs. The SEM analysis exhibits the even dissemination of Si3N4 particles in the Al alloy. The mechanical properties of the composites are examined by conducting several kinds of tests like compression test, impact test, tensile test and hardness test to understand the relationship between the weight percentages of reinforcement on the mechanical characteristics of the manufactured AMCs. The un-lubricant tribological characteristics of the proposed AMCs were assessed utilizing pin on disk tribometer. The hardness, compression and tensile strength of the AMCs were augmented concerning the mass proportion of reinforcement content. Finally, the wear test result reveals that the addition of nano-sized Si3N4 reinforcement contents up to a mass proportion of 3% downgrades the wear rate.



中文翻译:

搅拌铸造AA6351 / Si 3 N 4复合材料的组织和摩擦学性能

在当前的研究中,AA6351(Al-Si-Mg)被用作基质材料,而氮化硅(Si 3 N 4)颗粒被用作增强材料来制造铝复合材料(AMC)。通过搅拌铸造技术合成了掺有几种重量分数的Si 3 N 4(0、1、2和3重量%)的AA6351基体复合材料。通过扫描电子显微镜(SEM),X射线衍射(XRD)和能量色散X射线分析(EDS)对获得的复合材料进行表征。EDS和XRD光谱表明,制造的AMC中存在Si 3 N 4增强成分。SEM分析显示Si 3 N的均匀分布铝合金中有4个颗粒。通过进行多种测试(例如压缩测试,冲击测试,拉伸测试和硬度测试)来检查复合材料的机械性能,以了解增强材料的重量百分比与制造的AMC的机械特性之间的关系。提出的AMC的非润滑摩擦学特性是通过针盘摩擦计评估的。关于增强材料含量的质量比例,AMC的硬度,抗压强度和抗拉强度得到了提高。最后,磨损测试结果表明,纳米质量分数为3%的Si 3 N 4纳米增强材料的添加降低了磨损率。

更新日期:2020-10-15
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