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Characterization of HVOF Sprayed Al2O3 - CeO2 Coatings Deposited on Mg Az 91 Alloy

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Abstract:

Al2O3, Al2O3-10%CeO2 and Al2O3 – 20% CeO2 coatings were deposited on Mg AZ91 alloy by High Velocity Oxy Fuel (HVOF) process. The microstructure of deposited coatings was characterized by scanning electron microscopy and x-ray diffraction. Nano-indentation tests were performed on deposited coatings to determine its load bearing capacity and elastic recovery. Al2O3 coatings exhibited coarse grain structure with porous sites. While addition of CeO2 promoted grain refinement in the coatings. A load of 100mN was applied on all the samples for nano-indentation test. Coating with 20%CeO2 exhibited maximum load bearing capacity of 98.7mN with elastic recovery displacement of 1000 nm.

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Periodical:

Materials Science Forum (Volume 1048)

Pages:

254-260

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1048.254

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Online since:

January 2022

Authors:

Kaushik V. Prasad*, H. Adarsha

Keywords:

Aluminum Oxide, Cerium Oxide, HVOF Coatings, Nanoindentation, Thermal Spray Coatings

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© 2022 Trans Tech Publications Ltd. All Rights Reserved

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