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Peer reviewed
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Pei, C. G.; Guo, Z. X.; Xiao, J. G.
Surface engineering, 05/04/2021, Volume: 37, Issue: 5Journal Article
Al 85 Ni 8 Y 4 Ce 3 amorphous coatings were prepared on Q235 steel by laser thermal spraying and laser remelting. The structure and thermodynamic behaviour of the coating were analysed by scanning electron microscope, energy-dispersive spectrometer, X-ray diffractometer and differential scanning calorimeter. The microhardness distribution and wear properties of the coating were investigated by microhardness tester and wear tester. The results revealed that a small number of pores and AlFeNi crystal phases presented on the surface of spraying coating, and the remelting layer presented a dense structure with a smooth surface. The volume fraction of the amorphous phase in the remelting layer was 89.9% that indicated a better glass-forming ability. The surface microhardness of the spraying coating was 754.2 HV 0.2 , and the hardness of the remelted layer was 847.6 HV 0.2 . After laser remelting treatment, the friction coefficient of the coating decreases by 20% and the wear resistance increases by 31%.
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