中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2013年
11期
3353-3361
,共9页
超细镍纳米线%温度相关性%应变率相关性%拉伸性能%分子动力学模拟
超細鎳納米線%溫度相關性%應變率相關性%拉伸性能%分子動力學模擬
초세얼납미선%온도상관성%응변솔상관성%랍신성능%분자동역학모의
ultrathin nickel nanowires%temperature dependence%strain rate dependence%tensile properties%molecular dynamics simulation
基于EAM势，采用分子动力学方法对超细镍纳米线(直径分别为3.94、4.95和5.99 nm)在?100?晶向的拉伸性能进行研究，并对其温度相关性和拉伸应变率相关性进行探讨。结果表明：弹性模量和屈服强度随着温度的升高而逐渐降低，并且随着拉伸应变率的增大，应力-应变曲线波动程度变大，超细镍纳米线发生断裂时的应变越来越小。在0.01 K温度下，超细镍纳米线屈服强度随拉伸应变率的升高迅速降低；但在其它温度条件下，拉伸应变率对弹性模量和屈服强度的影响较小。简要分析尺寸大小对镍纳米线拉伸性能的影响。
基于EAM勢，採用分子動力學方法對超細鎳納米線(直徑分彆為3.94、4.95和5.99 nm)在?100?晶嚮的拉伸性能進行研究，併對其溫度相關性和拉伸應變率相關性進行探討。結果錶明：彈性模量和屈服彊度隨著溫度的升高而逐漸降低，併且隨著拉伸應變率的增大，應力-應變麯線波動程度變大，超細鎳納米線髮生斷裂時的應變越來越小。在0.01 K溫度下，超細鎳納米線屈服彊度隨拉伸應變率的升高迅速降低；但在其它溫度條件下，拉伸應變率對彈性模量和屈服彊度的影響較小。簡要分析呎吋大小對鎳納米線拉伸性能的影響。
기우EAM세，채용분자동역학방법대초세얼납미선(직경분별위3.94、4.95화5.99 nm)재?100?정향적랍신성능진행연구，병대기온도상관성화랍신응변솔상관성진행탐토。결과표명：탄성모량화굴복강도수착온도적승고이축점강저，병차수착랍신응변솔적증대，응력-응변곡선파동정도변대，초세얼납미선발생단렬시적응변월래월소。재0.01 K온도하，초세얼납미선굴복강도수랍신응변솔적승고신속강저；단재기타온도조건하，랍신응변솔대탄성모량화굴복강도적영향교소。간요분석척촌대소대얼납미선랍신성능적영향。
Based on the EAM potential, a molecular dynamics study on the tensile properties of ultrathin nickel nanowires in the?100?orientation with diameters of 3.94, 4.95 and 5.99 nm was presented at different temperatures and strain rates. The temperature and strain rate dependences of tensile properties were investigated. The simulation results show that the elastic modulus and the yield strength are gradually decreasing with the increase of temperature, while with the increase of the strain rate, the stress-strain curves fluctuate more intensely and the ultrathin nickel nanowires rupture at one smaller and smaller strain. At an ideal temperature of 0.01 K, the yield strength of the nanowires drops rapidly with the increase of strain rate, and at other temperatures the strain rate has a little influence on the elastic modulus and the yield strength. Finally, the effects of size on the tensile properties of ultrathin nickel nanowires were briefly discussed.
