ABSTRACT

Fabrication of a copper Metal Matrix Surface Composite (MMSC) via Friction Stir Processing (FSP) is discussed in this research, wherein Titanium Dioxide (TiO₂) and Alumina hybrid particles (Al₂O₃) were dispersed onto copper surface. TiO₂ and Al₂O₃ blended in equal proportion were compacted onto the grooves for friction stir processing at varying volume fractions i.e. 5, 10 and 15 volume percentages. The presence of reinforcement particles were observed through scanning electron micrographs and excellent bonding with reinforcements and copper were also spotted. Mechanical properties including tensile strength and micro hardness showcased an incremental drift with the introduction of reinforcement. Fracture surface studies proved the ductile nature of the fabricated surface composites. Studies on wear properties stated that the occurrence of these hybrid particles can enhance wear resistance of substrate metal. Wear morphology of worn-out surfaces approves with the above conclusion.

摘要

本研究讨论了通过搅拌摩擦加工 (FSP) 制造铜金属基表面复合材料 (MMSC)，其中将二氧化钛 (TiO ₂ ) 和氧化铝混合颗粒 (Al ₂ O ₃ ) 分散到铜表面。TiO ₂和Al ₂ O ₃以不同的体积分数（即 5、10 和 15 体积百分比）将等比例混合的材料压实到凹槽上进行摩擦搅拌处理。通过扫描电子显微照片观察到增强颗粒的存在，并且还发现了与增强材料和铜的良好结合。机械性能包括抗拉强度和显微硬度，随着增强材料的引入，显示出逐渐增加的漂移。断裂表面研究证明了制造的表面复合材料的延展性。对磨损性能的研究表明，这些混合颗粒的出现可以提高基材金属的耐磨性。磨损表面的磨损形态与上述结论一致。