Abstract
In-situ nanostructured FeAl2O4 composite coatings were prepared using plasma spraying of Al/Fe2O3 composite powders applying different spraying powers. The effects of plasma-spraying powers on microstructure and property of FeAl2O4 composite coatings were investigated. The results indicated the composite coatings had the microstructure with thin lamellar splats rich in FeAl2O4 as matrix, and dispersed granules rich in Fe and thin lamellar splats rich in Al2O3 as second phases. The reaction degree of Al/Fe2O3 composite powders increased while applying spraying power of 25-30 kW and then decreased while applying spraying power of 30-40 kW, which first resulted in the increase and then in the decrease of the Al2O3 content. The coating prepared by applying spraying power of 30 kW had the maximum microhardness, which was attributed to the maximum Al2O3 content present in the coating and the most uniform microstructure of the coating.
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The authors gratefully acknowledge the financial supports of the National Natural Science Foundation of China (51072045, 51102074 and 51272065); China Postdoctoral Science Foundation (20110490979) and Project (20101317120005) supported by Doctoral Program Specialized Research Foundation for Universities, China; and Outstanding Youth Fund for Science and Technology Research of Universities in Hebei Province (Y2012003).
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Yang, Y., Yan, Dr., Dong, Yc. et al. Effects of Plasma-spraying Powers on Microstructure and Microhardness of In-Situ Nanostructured FeAl2O4 Composite Coatings. J Therm Spray Tech 22, 1002–1006 (2013). https://doi.org/10.1007/s11666-013-9944-5
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DOI: https://doi.org/10.1007/s11666-013-9944-5