Depth sensing indentation of organic-inorganic hybrid coatings deposited onto a polymeric substrate

被引：3

作者：

Fasce, L. A. ^{[1
]}

Seltzer, R. ^{[2
]}

Frontini, P. M. ^{[1
]}

机构：

[1] Natl Univ Mar del Plata, CONICET, INTEMA, Mar Del Plata, Buenos Aires, Argentina

[2] IMDEA Mat Inst, Madrid 28040, Spain

来源：

SURFACE & COATINGS TECHNOLOGY | 2012年 / 210卷

关键词：

Depth sensing indentation; Organic-inorganic hybrid coating; Elastic modulus; Numerical simulation; SOL-GEL COATINGS; PVC MEDICAL DEVICES; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; ELASTIC-MODULUS; HARD FILMS; SCRATCH RESISTANCE; LOADING CURVE; THIN-FILMS; IMPROVEMENT;

D O I：

10.1016/j.surfcoat.2012.08.064

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

PEO-Si/SiO2 hybrid coatings deposited onto a PVC substrate were micromechanically characterized using depth sensing indentation. The effect of curing time and coating thickness was investigated. Elastic moduli of coated systems determined by the Oliver-Pharr approach displayed a continuous decreasing trend with increasing indentation depth, reflecting that the hybrids are stiffer than the substrate. Aiming to extract coating-only elastic modulus a simple method based on FE simulations was developed. The method was applied to evaluate the moduli of the hybrid coatings and the values were compared with those obtained by applying different approaches available in literature. The elastic modulus of PEO-Si/SiO2 hybrids was proven to be practically independent of curing time after 24 h. However, large curing times resulted in coatings being more prone to failure. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：62 / 70

页数：9

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