Affiliation:
1. Kunming University of Science and Technology
Abstract
Fe-based amorphous coatings have many excellent performances, such as good corrosion resistance, high hardness, satisfactory magnetism, etc. In this paper, Fe-P amorphous coatings were prepared by electrodeposition method, and the phase transformation, microstructure, and hardness of the coatings heated at different heat-treatment temperature were investigated. The results show that Fe-P amorphous coatings begin to crystallize when heated at 300°C, the α-Fe(P) solid solution appears when heated at 330°C, and FexP(X=1,2,3) compounds separate out from the solid solution when heat-treatment temperature is up to 370°C. During the process of heat-treatment, hardness of the Fe-P coating increases as the reinforcement result of solid solution and dispersed phase in the coatings, and the hardness reaches the maximum 1100 HV at 370°C. When heat-treatment temperature is higher than 460°C, dispersed phase in the coatings will grow up, which is called Ostwald Coarsening Phenomenon, and hardness of the coating decreases quickly.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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