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

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 decreasin...

Full description

Saved in:
Bibliographic Details
Published in:Surface & coatings technology 2012-10, Vol.210, p.62-70
Main Authors: Fasce, L.A., Seltzer, R., Frontini, P.M.
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Depth sensing indentation
Elastic modulus
Exact sciences and technology
Materials science
Metals. Metallurgy
Nonmetallic coatings
Numerical simulation
Organic–inorganic hybrid coating
Physics
Production techniques
Surface treatment
Surface treatments
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 24h. However, large curing times resulted in coatings being more prone to failure. ► Several PEO-Si/SIO2//PVC systems were characterized by depth sensing indentation. ► System behavior was properly described as elastic//elastoplastic materials in FE simulations. ► Elastic moduli determined by Oliver–Pharr approach decreased with indentation depth. ► Intrinsic PEO-Si/SIO2 elastic moduli were extracted from apparent values via FEA. ► A long curing time had a slight effect on hybrids moduli but weakened interfacial strength.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2012.08.064