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Hardness and Elastic Modulus Profiles of Hybrid Coatings

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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.

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Authors and Affiliations

  1. Department of Applied Chemistry, Harbin Institute of Technology (HIT), Box 713, Harbin, 15001, China

    Lijiang Hu

  2. Department of Environmental Engineering, Harbin Institute of Technology (HIT), Box 713, Harbin, 15001, China

    Xingwen Zhang

  3. Department of Mechanics, Harbin Institute of Technology (HIT), Box 713, Harbin, 15001, China

    Yi Sun

  4. National Research Council (CONICET), Institute of Materials Science and Technology (INTEMA), University of Mar del Plata, J.B. Justo 4302, 7600, Mar del Plata, Argentina

    Roberto J. J. WILLIAMS

Authors
  1. Lijiang Hu
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  2. Xingwen Zhang
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  3. Yi Sun
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  4. Roberto J. J. WILLIAMS
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Correspondence to Roberto J. J. WILLIAMS.

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Hu, L., Zhang, X., Sun, Y. et al. Hardness and Elastic Modulus Profiles of Hybrid Coatings. J Sol-Gel Sci Technol 34, 41–46 (2005). https://doi.org/10.1007/s10971-005-1260-1

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  • DOI: https://doi.org/10.1007/s10971-005-1260-1

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