| Authors: |
Xiao Chen* / School of Mechanical & Materials Engineering, China
Hongtao Wang/ Key Laboratory of Green Remanufacture, Research Center of Surface Remanufacture Engineering of Materials,Jiujiang University, China
Gangchang Ji/ Key Laboratory of Green Remanufacture, Research Center of Surface Remanufacture Engineering of Materials,Jiujiang University, China
Xiaobo Bai/ Key Laboratory of Green Remanufacture, Research Center of Surface Remanufacture Engineering of Materials,Jiujiang University, China
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| Abstract: |
Ni/Al composite coatings were deposited on Q235 steel substrates by cold spraying using nickel-aluminium powder mixture with a Ni/Al atomic ratio of 1:1. The influence of accelerating gas temperature on formation of cold sprayed Ni/Al composite coating was investigated. The microstructure, chemical and phase composition of as-sprayed coatings were investigated using scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The experimental results show that the coatings have dense microstructure with low porosity. With the increase of the accelerating gas temperature, the thickness of the coating increases and the porosity of the coating decreases. By analyzing the phase compositions of Ni/Al composite coatings, the main phase compositions of the coatings are composed of Ti and Al. After heat treatment at 600 , with the increase of the heat treatment time, it can be found that the amount of Ni3Al phase decreases and NiAl phase increases.
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