Hardness and Elastic Modulus Profiles of Hybrid Coatings View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2005-04

AUTHORS

Lijiang Hu, Xingwen Zhang, Yi Sun, Roberto J. J. WILLIAMS

ABSTRACT

Instrumented-indentation testing (IIT) provided with a continuous stiffness measurement (CSM) technique was employed to measure hardness and elastic modulus profiles of thin organic/inorganic hybrid coatings on glass surfaces. Hybrids were synthesized by the hydrolytic condensation of (3-methacryloxypropyl) trimethoxysilane (MPMS) or vinyltrimethoxysilane (VMS), with 5–30 wt% tetraethoxysilane (TEOS), in the presence of formic acid. Coatings of 600–800 nm on glass substrates were obtained by dip-coating solutions of these hybrids with benzoyl peroxide (BPO) addition, and curing in an oven following a thermal cycle up to 120∘C. Both hardness and elastic modulus showed a maximum value close to the surface, followed by a plateau and a significant increase at higher penetrations. Hybrids based on MPMS and 20–30 wt% TEOS exhibited a good combination of intrinsic values of hardness (0.50 GPa) and brittle index (0.06–0.07), that makes them suitable for coatings of plastic substrates. More... »

PAGES

41-46

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10971-005-1260-1

DOI

http://dx.doi.org/10.1007/s10971-005-1260-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1032457482


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