Study on the Preparation of Composite Coating of Ni-Al_2O_3 and Its Wear Resistance
The composite coating reinforced by Al 2O 3 ceramics powder was prepared by O 2 C 2H 2 thermal spray weld.The influences of mass ratio of Al 2O 3 on structure and property were studied.The results show that composite coating with 0.5% Al 2O 3 have the best abrasive resis tance which is equal to that of the coating with 25% WC.So the fabrication cost would decrease greatly.