Abrasion, Erosion and Cavitation Erosion Wear Properties of Thermally Sprayed Alumina Based Coatings

Coatings

Ville Matikainen¹  Kari Niemi²  Heli Koivuluoto² 

[1] Department of Materials Science, Tampere University of Technology, Korkeakoulunkatu 6, FI-33720 Tampere, Finland;

关键词: abrasion;    erosion;    cavitation;    plasma spray;    high-velocity oxygen-fuel (HVOF);    alumina;    alumina-titania;   

DOI  :  10.3390/coatings4010018

来源: mdpi

【 摘 要 】

Thermally-sprayed alumina based materials, e.g., alumina-titania (Al₂O₃-TiO₂), are commonly applied as wear resistant coatings in industrial applications. Properties of the coatings depend on the spray process, powder morphology, and chemical composition of the powder. In this study, wear resistant coatings from Al₂O₃ and Al₂O₃-13TiO₂ powders were sprayed with plasma and high-velocity oxygen-fuel (HVOF) spray processes. Both, fused and crushed, and agglomerated and sintered Al₂O₃-13TiO₂ powders were studied and compared to pure Al₂O₃. The coatings were tested for abrasion, erosion, and cavitation resistances in order to study the effect of the coating structure on the wear behavior. Improved coating properties were achieved when agglomerated and sintered nanostructured Al₂O₃-13TiO₂ powder was used in plasma spraying. Coatings with the highest wear resistance in all tests were produced by HVOF spraying from fused and crushed powders.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.