Effect of thermal treatment on mechanical and tribological properties of hybrid coatings deposited by sol-gel route on stainless steel

SURFACE & COATINGS TECHNOLOGY

卷:235

Article

Rahoui, S.¹  Turq, V.¹  Bonino, J. -P.¹ 

[1] Univ Toulouse 3, Univ Toulouse, Inst Carnot CIRIMAT, UMR UPS INP CNRS 5085, F-31062 Toulouse 9, France

关键词: Hybrid;    Sol-gel;    Mechanical properties;    Tribology;    Thermal treatment;   

DOI  :  10.1016/j.surfcoat.2013.07.008

来源: Elsevier

【 摘 要 】

This paper deals with the effect of thermal treatment on the mechanical and tribological properties of an organic-inorganic hybrid coating deposited on stainless steel 430. Organic-inorganic coating derived from glycidoxypropyltrimethoxysilane (GPTMS) and aluminum tri-sec-butoxide Al(OsBu)3 were prepared via sol-gel route and deposited by dip-coating process with various thicknesses. A preliminary thermal analysis (DTA, TGA) of xerogel obtained by hydrolysis and condensation reaction of sols, highlighted three characteristic domains of temperature (110-200 degrees C, 250-300 degrees C, 400-500 degrees C). When thermal treatments were applied to the coated stainless steel in these temperature domains, the tribological behavior (wear and friction) underwent strong changes, analyzed from linear ball/plane tribometry. The tribological tests showed a lower friction coefficient and wear after thermal treatment at a temperature in the domain 250-300 degrees C. In order to explain this phenomenon, xerogel structure was studied from XRD and Raman spectroscopy and correlated to the mechanical and adhesive properties and to the tribological behavior. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

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