| Temperature effect on elastic modulus of thin films and nanocrystals | |
Liang LH(梁立红) ; Li MZ(李美之); Qin FQ(秦福麒); Wei YG(魏悦广); Liang LH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China
| |
| Source Publication | PHILOSOPHICAL MAGAZINE
 |
| 2013-02-01 | |
| Volume | 93Issue:6Pages:574-583 |
| ISSN | 1478-6435 |
| Abstract | The stability of nanoscale devices is directly related to elasticity and the effect of temperature on the elasticity of thin films and nanocrystals. The elastic instability induced by rising temperature will cause the failure of integrated circuits and other microelectronic devices in service. The temperature effect on the elastic modulus of thin films and nanocrystals is unclear although the temperature dependence of the modulus of bulk materials has been studied for over half a century. In this paper, a theoretical model of the temperature-dependent elastic modulus of thin films and nanocrystals is developed based on the physical definition of the modulus by considering the size effect of the related cohesive energy and the thermal expansion coefficient. Moreover, the temperature effect on the modulus of Cu thin films is simulated by the molecular dynamics method. The results indicate that the elastic modulus decreases with increasing temperature and the rate of the modulus decrease increases with reducing thickness of thin films. The theoretical predictions based on the model are consistent with the results of computational simulations, semi-continuum calculations and the experimental measurements for Cu, Si thin films and Pd nanocrystals. |
| Keyword | Cohesive Energy Nanocrystals Thermal Expansion Size Effect Vibration Entropy |
| Subject Area | 固体力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000322305500001 |
| Funding Organization | National Basic Research Program of China [2012CB937500]; National Natural Science Foundation of China [10802088, 10832008, 11023001, 11021262, 10932011, 91116003]; the Opening Fund of LNM |
| Department | LNM新型材料及结构的多尺度力学 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46938 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Liang LH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China |
| Recommended Citation GB/T 7714 | Liang LH,Li MZ,Qin FQ,et al. Temperature effect on elastic modulus of thin films and nanocrystals[J]. PHILOSOPHICAL MAGAZINE,2013,93,6,:574-583. |
| APA | 梁立红,李美之,秦福麒,魏悦广,&Liang LH .(2013).Temperature effect on elastic modulus of thin films and nanocrystals.PHILOSOPHICAL MAGAZINE,93(6),574-583. |
| MLA | 梁立红,et al."Temperature effect on elastic modulus of thin films and nanocrystals".PHILOSOPHICAL MAGAZINE 93.6(2013):574-583. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| IMCAS-J2013-068.pdf（307KB） | 开放获取 | License | View Download | |||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment