Wear mechanism of electrodeposited amorphous Ni-Fe-P alloys①
来源期刊：中国有色金属学报(英文版)2004年第2期
论文作者：高诚辉 赵源
文章页码：255 - 259
Key words：Ni-Fe-P coating; amorphous alloy; wear mechanism
Abstract: The wear mechanism of amorphous Ni-Fe-P coating was discussed. The wear resistance of the amorphous Ni-Fe-P coatings was tested on a Timken wear apparatus, and the wear track of the amorphous Ni-Fe-P coatings as-deposited and heated at various temperatures was observed by SEM. The results show that the wear resistance reaches a maximum value at NaHPO2·H2O concentration of 5 g/L, and heating at 400℃. The wear mode of the coating will change with the heating temperature increasing from pitting+plowing at 200℃to pitting at 400℃, and to plowing at 600℃. The pits on the worn surface of the amorphous Ni-Fe-P coating result from the tribo-fatigue fracture. The cracks of spalling initiate at pits and propagate at certain angle with the sliding direction on surface, and then extend into sub-surface along the poor P layers or the interface between layers. Finally under repeated action of the stress in the rubbing process the cracks meet and the debris forms. The generation of the pits and spalling is related with the internal stress, brittleness and layer structure of the amorphous Ni-Fe-P coating.
