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首页> 外文期刊>Physica status solidi, B. Basic research >Dislocated micro- and nanopipes with surface steps
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Dislocated micro- and nanopipes with surface steps

机译:具有表面台阶的微管和纳米管错位

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摘要

The steps at the inner surfaces of micro- and nanopipes containing screw superdislocations are theoretically investigated and discussed. The stress fields of dislocated pipes with small axially symmetric steps are derived in a closed approximate form. The pipes in an infinite medium as well as the pipes perpendicular to a flat free surface are examined. The forces acting on pipe steps are also calculated, and the equilibrium positions for the steps are found. It is shown that subsurface pipe steps repulse from the free surface if they decrease the pipe radius. It is also demonstrated that the same-sign steps attract each other (at least, as long as they are small), and so the formation of large enough steps at the pipe surface is possible. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
机译:理论上研究和讨论了包含螺旋超位错的微管和纳米管内表面的台阶。以封闭的近似形式导出具有小的轴向对称台​​阶的位移管的应力场。检查了无限介质中的管道以及垂直于平坦自由表面的管道。还计算了作用在管道台阶上的力,并找到了台阶的平衡位置。结果表明,如果地下管道台阶减小了管道半径,则会从自由表面排斥。还证明了相同符号的台阶彼此吸引(至少,只要它们很小),因此可以在管子表面形成足够大的台阶。 (C)2004 WILEY-VCH Verlag GmbH&Co. KGaA,Weinheim。

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