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分子动力学模拟单晶纳米铝丝的拉伸破坏 被引量:12
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作者 黄丹 陶伟明 郭乙木 《兵器材料科学与工程》 CAS CSCD 北大核心 2005年第3期1-4,共4页
采用原子镶嵌势函数模拟单晶纳米铝丝在受单向拉伸时的变形破坏过程,分析了纳米铝丝的力学性能及微缺陷形成与演化过程。模拟表明纳米金属丝在无外载荷状态存在本征应力,原子缺陷从自由表面开始向内部扩展。自由表面发射位错,位错的移... 采用原子镶嵌势函数模拟单晶纳米铝丝在受单向拉伸时的变形破坏过程,分析了纳米铝丝的力学性能及微缺陷形成与演化过程。模拟表明纳米金属丝在无外载荷状态存在本征应力,原子缺陷从自由表面开始向内部扩展。自由表面发射位错,位错的移动消耗能量导致了纳米丝的塑性,自由表面原子的不稳定运动降低了纳米丝的强度。模拟得到单晶铝纳米丝的弹性模量和断裂强度,证明纳米丝的破坏从能量平衡角度符合Griffith断裂理论。 展开更多
关键词 分子动力学 镶嵌原子法 拉伸破坏 纳米铝丝
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Preparation of copper nano-wires by template synthesis method 被引量:1
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作者 郑国渠 倪似愚 +2 位作者 郑华钧 干学宏 张九渊 《Journal of Central South University of Technology》 SCIE EI CAS 2004年第4期371-374,共4页
Highly ordered and porous anodic aluminum oxide templates were prepared. The ordered copper nanowires arrays were assembled in nano-holes of the template by alternating current electrodeposition at lover voltage. The ... Highly ordered and porous anodic aluminum oxide templates were prepared. The ordered copper nanowires arrays were assembled in nano-holes of the template by alternating current electrodeposition at lover voltage. The morphologies of template and copper nano-wires arrays were characterized by means of field emission scanning electron microscope (FESEM) and the crystal structure of copper nano-wires was determined by means of X-ray diffraction. The results indicate that copper nano-wires hold the preferred crystalline orientation along (111), (200), (220) and (331) crystal faces during growth, and the growth of copper nano-wires in the nano-holes of the template is homogenous and continuous. 展开更多
关键词 TEMPLATE porous alumina copper nano-wires ELECTRODEPOSITION
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