Affiliation of Author(s):材料科学与技术学院
Journal:SURFACE ENGINEERING
Key Words:Al-Si coating mechanical alloying annealing treatment microhardness friction and wear resistance high-temperature oxidation resistance
Abstract:An Al-Si composite coating was synthesised on Ti-6Al-4 V alloy substrate by means of mechanical alloying. The as-synthesised coating had a composite structure. The effects of annealing treatment on the microstructure, the mechanical properties and the oxidation resistance of coating were investigated. The increase in annealing temperature was conductive to the formation of multilayered structure of the coating. The formation processes of the layers at different annealing temperatures were discussed. The coating annealed at 800 degrees C had intermetallic layers, which improved the microhardness and wear resistance of the coating. The microhardness of the coating annealed at 800 degrees C reached more than three times of the substrate microhardness. In addition, the coating annealed at 800 degrees C had a thick inner protecting layer, which could retard the inward diffusion of oxygen during oxidation. The annealing of the coating at 800 degrees C could improve the mechanical properties and oxidation resistance of the coating.
ISSN No.:0267-0844
Translation or Not:no
Date of Publication:2017-01-01
Co-author:Chen, Cheng,Lu, Congyang,SHEN Yifu
Correspondence Author:FENG Xiaomei