Abstract

The aim of this work is to fabricate aluminum, boron carbide (B₄C) based aluminum matrix composites (AMCs) using easy and cost effective powder metallurgy (P/M) route. Here, Al–Mg–Si composites having different weight fractions of B₄C (3.5,7.0,10.5,14.0 and 17.5 wt%) were synthesized to study the dry sliding wear behavior with respect to automobile brake pad material. The surface morphology and elemental composition of fabricated composite material were characterized by Scanning Electron Microscope (SEM) and energy dispersive x-ray spectroscopy (EDS) respectively. Further, dry sliding wear tests were conducted with respect to i.e. applied loads, sliding distances and reinforcements for the performance analysis of synthesized AMCs. A linear regression model was used to optimize the control factors. Furthermore, explore the effects of reinforcements on density, Vickers hardness, wear rate and worn out surface morphology. Further, the analysis also revealed the critical wear mechanisms with their wear debris for improvement in the AMCs. The hardness of aluminum composite (17.5% B₄C/Al–Mg–Si) showed 54.15% higher value than matrix alloy. Furthermore, it was observed that AMCs showed significant improvement on the various factors e.g., applied load (L), sliding distances (SD) and reinforcements (R) than that of aluminium matrix alloy.

Graphic Abstract

中文翻译：

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B 4 C对粉末冶金法合成B 4 C / Al-Mg-Si复合材料干滑动磨损行为的影响

摘要

这项工作的目的是使用简单且经济高效的粉末冶金（P / M）路线制造铝，碳化硼（B ₄ C）基铝基复合材料（AMC）。在这里，具有不同重量分数的B _4的Al-Mg-Si复合材料合成C（3.5、7.0、10.5、14.0和17.5 wt％）以研究相对于汽车刹车片材料的干滑磨损行为。用扫描电子显微镜（SEM）和能量色散X射线能谱（EDS）分别表征了复合材料的表面形貌和元素组成。此外，针对合成AMC的性能分析，针对施加的载荷，滑动距离和增强进行了干式滑动磨损测试。线性回归模型用于优化控制因素。此外，探索增强材料对密度，维氏硬度，磨损率和磨损的表面形态的影响。此外，分析还揭示了关键磨损机理及其磨损碎片，可改善AMC。铝复合材料的硬度（B为17.5％₄ C / Al–Mg–Si）的值比基体合金高54.15％。此外，据观察，AMC在各种因素（例如施加载荷（L），滑动距离（SD）和增强材料（R））方面均比铝基合金显着改善。

图形摘要