EXOTHERMIC REACTION OF Ni-Al DURING SPRAYING

According to the practical observation during Ni-Al spraying and the phase structures of coatings and to the results of differential thermal analysis, the reaction process of Ni-Al during spraying was studied. Furthermore, the heat release and the synerg istic enhancement temperature during spraying were calculated. The heat releases neasured were in conformity with the calculated results within the range of conventional Ni-Al composition.