Nanoindentation study of the mechanical and damage behaviour of suspension plasma sprayed TiO2 coatings

SURFACE & COATINGS TECHNOLOGY

卷:206

Article

Rayon, E.¹  Bonache, V.¹  Salvador, M. D.¹  Bannier, E.²  Sanchez, E.²  Denoirjean, A.³  Ageorges, H.³ 

[1] Univ Politecn Valencia, Inst Tecnol Mat, E-46022 Valencia, Spain

[2] Inst Tecnol Ceram, E-12006 Castellon de La Plana, Spain

[3] Univ Limoges, Fac Sci & Tech, SPCTS, CNRS,UMR 6638, F-87060 Limoges, France

关键词: Suspension plasma spray;    Nanoindentation;    TiO2;    Microstructure characterisation;    Photocatalysis;   

DOI  :  10.1016/j.surfcoat.2011.11.010

来源: Elsevier

【 摘 要 】

TiO2 coatings can be used as self-cleaning surfaces owing to their photocatalytic and hydrophilic properties. Suspension plasma spray (SPS) has proven to be a feasible and cheap technique for producing self-cleaning surfaces with acceptable photo-activity. This paper presents a nanoindentation study of the mechanical properties (hardness. Young's modulus and scratch resistance) of photoactive layers of suspension plasma sprayed TiO2 coatings applied on to glass substrates. Microstructure observation showed that the rutile grains were surrounded by fine anatase crystals. Under the same spraying conditions, the resulting anatase/rutile concentrations varied depending on the cooling rate (the substrate being either cooled with water or in air). The results showed that higher concentrations of anatase, which is softer than rutile, reduced the scratch damage and increased the friction coefficient. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free