Abstract
Keywords
cold spray, fatigue, Al Composite
Abstract
The cold spray process is state-of -art, a low temperature method for preparing thick coatings. This rpocess 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 good preservation of original properties. This report deals with the study of fatigue life of aluminium composite coating consisted with aluminium matrix and silicon carbide reinforcing particals. 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-contolled condition up to more that 2 times of uncoated case.