Hardness and elastic modulus profiles of hybrid coatings

被引：35
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
收藏
页码：41 / 46
页数：6
相关论文
共 16 条
[1]   Finite element studies of the influence of pile-up on the analysis of nanoindentation data [J].
Bolshakov, A ;
Oliver, WC ;
Pharr, GM .
THIN FILMS: STRESSES AND MECHANICAL PROPERTIES VI, 1997, 436 :141-146
[2]   Silsesquioxanes derived from the bulk polycondensation of [3-(methacryloxy)propyl]trimethoxysilane with concentrated formic acid: Evolution of molar mass distributions and fraction of intramolecular cycles [J].
Eisenberg, P ;
Erra-Balsells, R ;
Ishikawa, Y ;
Lucas, JC ;
Nonami, H ;
Williams, RJJ .
MACROMOLECULES, 2002, 35 (04) :1160-1174
[3]   Organic/inorganic hybrid materials based on silsesquioxanes derived from (3-methacryloxypropyl) trimethoxysilane and their blends with vinylester resins [J].
Fanovich, MA ;
Pellice, SA ;
Galliano, PG ;
Williams, RJJ .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2002, 23 (01) :45-52
[4]   Mechanical properties of 3-glycidoxypropyltrimethoxysilane based hybrid organic-inorganic materials [J].
Innocenzi, P ;
Esposto, M ;
Maddalena, A .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2001, 20 (03) :293-301
[5]   HARD ORMOSILS PREPARED WITH ULTRASONIC IRRADIATION [J].
IWAMOTO, T ;
MACKENZIE, JD .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 1995, 4 (02) :141-150
[6]  
Li XD, 2002, MATER CHARACT, V48, P11, DOI 10.1016/S1044-5803(02)00192-4
[7]   Physical properties of sol-gel coatings [J].
Mackenzie, JD ;
Bescher, EP .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2000, 19 (1-3) :23-29
[8]   Mechanical properties of ormosils [J].
Mackenzie, JD ;
Huang, QX ;
Iwamoto, T .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 1996, 7 (03) :151-161
[9]   Measuring mechanical properties of coatings: a methodology applied to nano-particle-filled sol-gel coatings on glass [J].
Malzbender, J ;
den Toonder, JMJ ;
Balkenende, AR ;
de With, G .
MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2002, 36 (2-3) :47-103
[10]   AN IMPROVED TECHNIQUE FOR DETERMINING HARDNESS AND ELASTIC-MODULUS USING LOAD AND DISPLACEMENT SENSING INDENTATION EXPERIMENTS [J].
OLIVER, WC ;
PHARR, GM .
JOURNAL OF MATERIALS RESEARCH, 1992, 7 (06) :1564-1583
12