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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Fracture study of organic-inorganic coatings using nanoindentation technique
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Fracture study of organic-inorganic coatings using nanoindentation technique

机译：纳米压痕技术研究有机-无机涂层的断裂

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摘要

The mechanical response of different coating-substrate systems are investigated using the nanoindentation technique. From the load-penetration depth curves, we determined the hardness H-c and the elastic modulus E-c of the coatings. Moreover, as the force increases, cracks, delamination and chipping can appear. These effects induce discontinuities on the indentation curves. Measuring crack lengths or calculating the dissipated energy during indentation allows the determination of residual stress in the coating and interface toughness. Two kinds of organic-inorganic coatings on different substrates (silicon and glass) are studied. The coatings were prepared by the sol-gel process and deposited using the spin-coating technique. The first coating is a mixture of methyltrimethoxysilane, colloidal silica and tetraethylorthosilicate and the second one is based on 3-(trimethoxysilyl)propyl-methacrylate. The first one reveals better general mechanical properties (lower residual stress, better adhesion, higher interfacial toughness) on silicon than on glass. For the second one, the elastic modulus and hardness are comparable with those of polymers. In contrast, coating toughness is lower. (C) 2004 Published by Elsevier B.V.
机译：使用纳米压痕技术研究了不同涂层-基材系统的机械响应。从载荷穿透深度曲线，我们确定了涂层的硬度H-c和弹性模量E-c。此外，随着力的增加，可能会出现裂纹，分层和碎裂。这些影响导致压痕曲线不连续。通过测量裂纹长度或计算压痕时的耗散能量，可以确定涂层中的残余应力和界面韧性。研究了在不同基材（硅和玻璃）上的两种有机-无机涂层。通过溶胶-凝胶法制备涂层，并使用旋涂技术沉积。第一涂层是甲基三甲氧基硅烷，胶体二氧化硅和原硅酸四乙酯的混合物，第二涂层是基于甲基丙烯酸3-（三甲氧基甲硅烷基）丙基酯。第一个发现比玻璃具有更好的一般机械性能（较低的残余应力，更好的附着力，更高的界面韧性）。对于第二个，其弹性模量和硬度与聚合物相当。相反，涂层韧性较低。 （C）2004由Elsevier B.V.发布

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