LAUSR

The cermet based on metallic iron with zirconia toughened alumina (ZTA) as the reinforcing phase was 15 prepared by vacuum hot-pressed sintering. The ZTA particles were subjected to electroless nickel 16 plating to improve the interfacial bonding ability of ZTA and Fe matrix. In this paper, after electroless 17 nickel plating, the effects of different particle sizes and different contents of ZTA particles on the 18 grinding properties of Fe-based ZTA (Fe-ZTA) cermets were investigated. The results show that the 19 ZTA particles are tightly bound to the Fe matrix. An interface layer is formed between the ZTA 20 particles and the Fe matrix and it can improve the grinding ability of the Fe-ZTA cermet. By reducing 21 the particle size and the content of ZTA particles, the friction coefficient between Fe-based ZTA 22 cermet and the machined surface can be increased, and the surface roughness of the machined surface 23 will reduce. When the ZTA particle size is F14 and the iron binder content is 40%, the friction 24 coefficient between the Fe-ZTA cermet and the steel rod is 0.4981, the surface roughness of steel bar is 25 40.164μm, the grinding ratio is 685.952.