Abstract:NiAl composite can be used as the base course of ceramics coatings and the inoxidizable working coatings.Nano-phased aluminum particles whose average size was about 80 nm were prepared by evaporation-condensation method.We obtained the symmetrical oxidation membrane surrounding the aluminum inner core using HRTEM analysis.Characterization of particle size analyzed by SAXS(small angel X-ray scattering) and SEM,HRTEM and TG-DSC were employed to investigate the nanophased Al powder,the composite powder and the coatings.It shows that the composition is symmetrical and the clad is full of NiAl composite covered nano-phsed Al.The melt reaction temperature is lower and gives off more heat using TGDSC analysis.The results show that compact and homogeneous coatings take lamellar structures as characteristics and higher bonding strength with the base materials.