INVESTIGADORES
FRONTINI patricia Maria
artículos
Título:
Depth sensing indentation of organic?inorganic hybrid coatings deposited onto a polymeric substrate
Autor/es:
FASCE, LAURA; R SELTZER; P.M. FRONTINI
Revista:
SURFACE AND COATINGS TECHNOLOGY
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Lugar: Amsterdam; Año: 2012
ISSN:
0257-8972
Resumen:
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 were 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 hs. However, large curing times resulted in coatings being more prone to failure.
