Study of the Effect of Mechanical Alloying on 2024Al with SiCp and on Plasma Sprayed Coatings

摘要

2024 Aluminum alloy with 15wt.%SiC_p composite was produced by P/M processing. Mechanical alloying (MA) technique was used to mill the blended powder under purified nitrogen. The results of MA processing have been investigated with SEM, EDAX and XRD. The results show that the matrix particle size and crystallize size reduced after MA and homogeneous distribution of SiC_p reinforcement in the matrix could be obtained. The MA processed powder has also been used for plasma spraying and the morphology, hardness and phases present in the coatings have been discussed. The MA processing also results in cold worked structure, contamination due to oxygen, iron and carbon in the matrix.