Microstructure and tribological behavior of suspension plasma sprayed Al2O3 and Al2O3-YSZ composite coatings |
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Authors: | O. Tingaud |
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Affiliation: | Laboratoire d'Etudes et de Recherches sur les Matériaux, les Procédés et les Surfaces, LERMPS, Université Technologique de Belfort Montbéliard, UTBM-Site de Sévenans, 90010 Belfort, France |
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Abstract: | Several alumina and alumina-zirconia composite coatings were manufactured by suspension plasma spraying (SPS), implementing different operating conditions in order to achieve dense and cohesive structures. Temperatures and velocities of the in flight particles were measured with a commercial diagnostic system (Accuraspray®) at the spray distance as a function of the plasma operating parameters. Temperatures around 2000 °C and velocities as high as 450 m/s were detected. Hence, coatings with high amount of α-alumina phase were produced. The microstructure evolution according to the spray parameters was studied as well as the final tribological properties showing efficient wear resistance. |
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Keywords: | Suspension plasma spraying Spray parameters Alumina Zirconia Microstructure Wear properties |
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