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

Kaushik V. Prasad; H. Adarsha

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

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HomeMaterials Science ForumMaterials Science Forum Vol. 1048Characterization of HVOF Sprayed Al2O3 - CeO2...

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

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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