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论文类型：期刊论文

发表时间：2011-04-01

发表刊物：DIAMOND AND RELATED MATERIALS

收录刊物：SCIE、EI

卷号：20

期号：4

页面范围：551-555

ISSN号：0925-9635

关键字：Mechanical properties; Diamond nanowires; Strain rates; Size effects; Temperature dependent properties; Molecular dynamics; Atomistic methods

摘要：Using molecular dynamics simulations, strain rate, temperature and size dependent mechanical properties of < 001 > orientation diamond nanowires are investigated. It is found that, for the same cross-sectional areas, strain rates have almost no effect on yield strength and Young's modulus, provided strain rates are within the range from 0.001 to 0.025 ps(-1). Our calculated results have also indicated that, at the temperature ranging from 100 to 500 K, diamond nanowires' yield strength, Young's modulus, fracture strength and fracture strain are all decreasing with increasing temperature. Furthermore, at the temperature of 300 K, yield strength, Young's modulus, fracture strength and fracture strain increase dramatically with increasing cross sectional area. Finally, orientation dependent diamond nanowires mechanical properties are studied. (C) 2011 Elsevier B.V. All rights reserved.