Abstract
Metal matrix composites (MMCs) due to their innate ability to combine the metallic properties with ceramic properties have emerged as potential candidates for a variety of application in automobile, energy generation, and aerospace systems. Synthesis of MMCs incorporates the combination of selection of matrix material, reinforcement, processing methodology and its end application. The objective of this study was to provide preliminary information on the microstructure and fatigue properties of a spray deposited Al-Li-Zr alloy reinforced with SiC and graphite particulates. Microstructural characterization was conducted on the spray deposited composites using scanning electron microscopy (SEM) and was correlated with the fatigue properties. Particular emphasis was placed on examining the crack propagation path during fatigue testing and its interaction with the interface between the ceramic reinforcement (SiC/graphite) and metal matrix (Al-Li-Zr).
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