材料期刊网

Ni78-xCuxB22(x = 0-8.0 at%) amorphous alloys are prepared by electroless plating. The microstructure and kinetics of the crystallization are discussed. The phase transition of Ni72.9Cu5.1B22 amorphous alloy includes a two-step process of crystallization and decomposition process of metastable phase. With increase of copper content, the single large granula in lower copper content alloy changes to a cluster of small granulas; the crystallization temperature and activation energy for crystallization obtained from the first DTA exothermic peak increase first and decrease later. The substitution of Ni by Cu can improve the thermal stability to a certain extent, but the improvement is much less than the replacement of Ni by Si and Al.