Research was conducted on the microstructure, composition, and properties of a ceramic coating deposited on the surface of an aluminium matrix composite (10Al2O3f –ZL109) using microarc oxidation. The influence of different matrixes and reinforcements on the microstructure, properties, and deposition parameters of the ceramic coatings was studied. Both factors showed considerable effects, though the matrix composition had more influence. The results also showed that mullite ceramic coatings can be successfully deposited on the surfaces of aluminium matrix compos ites. The coating was composed of two layers, a porous layer and a dense layer.
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