| 微组装纳米多层材料的力学性能研究 |
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| 引用本文： | 何建立,刘长洪,李文治,李恒德.微组装纳米多层材料的力学性能研究[J].清华大学学报(自然科学版),1998(10). |
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| 作者姓名： | 何建立 刘长洪 李文治 李恒德 |
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| 作者单位： | 清华大学材料科学与工程系，摩擦学国家重点试验室 |
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| 摘 要： | 为研究探索新材料，采用离子束溅射沉积的方法制备了子层厚度为纳米量级的陶瓷／金属以及陶瓷／高分子多层膜。对这些纳米多层膜的结构和硬度、韧性行为进行了研究。发现纳米多层膜的硬度行为强烈地依赖于材料系统，在某些系统中出现了超硬度效应，而在某些系统则没有这一现象。纳米多层膜的韧性比单相的陶瓷材料有明显提高。硬度、韧性等力学行为与多层结构的组分比例、调制波长等参数有关。研究表明纳米多层结构是获取具有优良力学性能新材料的有效途径。
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| 关 键 词： | 多层膜 离子束溅射 微组装 硬度 韧性 |
Study of mechanical properties of micro assembly in nano scale |
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| HE Jianli,LIU Changhong,LI Wenzhi,LI Hengde.Study of mechanical properties of micro assembly in nano scale[J].Journal of Tsinghua University(Science and Technology),1998(10). |
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| Authors: | HE Jianli LIU Changhong LI Wenzhi LI Hengde |
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| Institution: | HE Jianli,LIU Changhong,LI Wenzhi,LI Hengde Department of Materials Science and Engineering,State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China |
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| Abstract: | Ion beam sputtering deposition technique was employed to prepare nano multilayers of ceramic/metal and ceramic/polymer for the purpose of new materials exploration. The hardness and toughness behavior of these nano composites was systematically investigated together with their structures. The multilayer hardness showed strong dependence on the materials system. Significant superhardness effect was found in some systems while in other systems no hardness enhancement was detected. The multilayer toughness was generally improved in comparison with the monolithic ceramics. Both hardness and toughness showed dependence on constituent fraction and modulation wavelength. This proves the possibility to obtain new materials with outstanding mechanical properties by nano mulitlayers. |
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