Abstract In this paper, the effects of sintering techniques (conventional, CS and electric resistance, ERS) and SiC content (1, 3 and 5 wt. %) on the microstructural, mechanical and tribological properties were investigated. Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were performed for microstructural investigation. Density, porosity and hardness were evaluated at different weight fractions of SiC for comparative study. Tribological behaviour was evaluated in terms of wear loss and coefficient of friction (COF). Worn-out surfaces and formed debris were also studied using SEM for understanding the wear mechanism. Results indicated that addition of SiC improved the hardness, wear resistance and COF. With addition of 5 wt. % SiC the hardness improved by 32 % for CS and 30% for ERS, wear resistance improved by 37 % for CS and 40% for ERS while COF improved by 3 % for CS (3 wt.% SiC) and 6 % for ERS (5 wt.% SiC) compared to neat Al. ERS processed composites resulted in better densification, improved hardness (12-14%) and tribological behaviour (wear resistance 36-39 % and COF 7-15 %) for 1-5 wt. % SiC compared to CS processed ones. Abrasion, adhesion and delamination were the controlling wear mechanism for Al-SiC composites with lesser adhesion wear in ERS composites.

中文翻译：

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烧结工艺对Al-SiC复合材料显微结构、力学和摩擦学性能的影响

摘要 在本文中，研究了烧结技术（常规、CS 和电阻、ERS）和 SiC 含量（1、3 和 5 wt.%）对微观结构、机械和摩擦学性能的影响。进行了扫描电子显微镜 (SEM)、能量色散 X 射线光谱 (EDS) 和 X 射线衍射 (XRD) 进行微观结构研究。为了比较研究，在不同重量分数的 SiC 下评估了密度、孔隙率和硬度。根据磨损损失和摩擦系数 (COF) 评估摩擦学行​​为。磨损的表面和形成的碎片也使用 SEM 进行了研究，以了解磨损机制。结果表明，添加 SiC 提高了硬度、耐磨性和 COF。添加 5 wt. % SiC 的硬度提高了 32 % 的 CS 和 30 % 的 ERS，与纯铝相比，CS 的耐磨性提高了 37%，ERS 的耐磨性提高了 40%，而 CS（3 wt.% SiC）的 COF 提高了 3%，ERS（5 wt.% SiC）的 COF 提高了 6%。ERS 处理的复合材料在 1-5 重量％的情况下产生更好的致密化、改进的硬度 (12-14%) 和摩擦学行为（耐磨性 36-39% 和 COF 7-15%）。% SiC 与 CS 处理的相比。磨损、粘附和分层是 Al-SiC 复合材料的控制磨损机制，ERS 复合材料的粘附磨损较小。