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Fatigue Properties of Al-Based Composites Reinforced With Silicon Carbide by Cold Spray Method
Published August 22, 2005 by Society of Automotive Engineers of Korea in South Korea
The cold spray process is state of the art, a low-temperature method for preparing thick coatings. This process allows one to formulate various mixtures of metals, ceramics, polymers, etc., and combine them with a ductile material (as the matrix), to produce composite coatings. Intrinsic low-temperature nature can provide minimal oxidation or chemical reaction between substrate and composite coating resulting in good preservation of original properties. This report deals with the study of fatigue life of aluminum composite coating consisted with aluminum matrix and silicon carbide reinforcing particles. The high-cycle fatigue (HCF) resistance of such composites at room temperature was evaluated under dynamic cyclic loading. The composites reinforced with large volume content of fine silicon carbide particles exhibited increasing of fatigue endurance limit and life under stress-controlled condition up to more than 2 times of uncoated case.