Tensile properties of TiC particles reinforced Aluminum matrix composites prepared via powder metallurgical processWednesday (08.11.2017) 16:20 - 16:40 Part of:
Metal matrix composites (MMCs) have long been recognized as promising potential structural materials owing to their specific mechanical properties and elongation. Especially, Aluminum (Al) is one of the best candidates as matrix material of MMCs because of its light weight and low price. Consequently, Al-based composite materials have attracted much attention as a light structural material. Al-based composite materials can be categorized into two types, fiber or particles reinforced composites. Fiber reinforced composites demonstrate the high mechanical properties in a particular direction. However, it paradoxically indicates that the mechanical properties of fiber reinforced composites are anisotropic. Particle reinforced composites have an advantage in having isotropic mechanical properties and for the secondary processing. In this study, TiC is focused as the reinforcement for Al-based composite materials because TiC has the excellent thermal stability at the high temperature and a chemical stability in Al-Ti-C system in compared with other candidates of reinforcements, such as Silicon carbide (SiC), Titanium carbide (TiC), Aluminum oxide (Al2O3), Boron nitride (BN). We fabricated nano TiC particles reinforced aluminum matrix (Al−TiC) composite without nano titanium carbide particles as a starting material via powder metallurgical process. The fabrication process of Al−TiC composite, without nano titanium carbide particles as a starting material, contributes to reduce not only the risk of health hazard attributed to nano powder, but also the cost for fabrication of Al−TiC composite. The tensile properties of the Al−TiC composites were investigated, and the fracture mechanism was discussed in terms of the microstructure of fabricated Al−TiC composites observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM).