Hardness and elastic modulus profiles of hybrid coatings

被引：34

作者：

Hu, LJ

Zhang, XW

Sun, Y

Williams, RJJ

机构：

[1] Univ Mar del Plata, Inst Mat Sci & Technol, RA-7600 Mar Del Plata, Argentina

[2] CNR, CONICET, RA-7600 Mar Del Plata, Argentina

[3] Harbin Inst Technol, Dept Appl Chem, Harbin 15001, Peoples R China

[4] Harbin Inst Technol, Dept Environm Engn, Harbin 15001, Peoples R China

[5] Harbin Inst Technol, Dept Mech, Harbin 15001, Peoples R China

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2005年 / 34卷 / 01期

关键词：

hybrid coatings; ormosils; hardness; elastic modulus; brittle index; instrumented-indentation testing (IIT); continuous stiffness measurement (CSM);

D O I：

10.1007/s10971-005-1260-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 degrees 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.

引用

页码：41 / 46

页数：6

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