Study of Al_(65)Cu_(23)Fe_(12) Coatings on AZ31 Magnesium Alloy by Plasma Spraying
In order to improve the surface properties of magnesium alloy,the plasma spraying was used to prepare Al_(65)Cu_(23)Fe_(12) coatings on AZ31 magnesium alloy.Microstructures and properties of coatings before and after heat treatments were studied by means of SEM、OM and EDS etc.The results show that coatings microstructures are primarily composed of θ phase、Cu-rich phase and Al-rich phase.Through T4 and T6 heat treatments,θ phase and Cu-rich phase reacted to β phase,and coatings hardness increase from HV200.2 before heat treatment to HV304.5 after heat treatment,which is far above that of AZ31 matrix.