STABILITY OF MULTIPLY-TWINNED PARTICLES

STABILITY OF MULTIPLY-TWINNED PARTICLES
复制标题

DOI:
10.1143/jpsj.27.941
复制
发表时间:
1969-01-01
影响因子:
1.7
通讯作者:
INO, S
INO, S
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
INO, S

文献摘要

被引文献

相似文献

发展了一种理论,使人们能够讨论多重孪生粒子的稳定性并计算稳定和准稳定状态的临界尺寸。 二十面体粒子对于r≤riw*基本上是稳定的,对于riw*<r≤rit0是准稳定的并且对于r>rit0是不稳定的,其中r>rit0是粒子的边长,而十面体粒子不是基本上稳定的,但是对于r≤rdt0是准稳定的并且对于r>rdt0是不稳定的。临界尺寸riw*、rit0和rdt0被公式化为比表面能γhkl、孪晶边界能γt、弹性应变能W和对基底的粘附能γ的函数。计算出几种元素在自由空间中生长的颗粒的临界直径 2riw*、2rit0 和 2rdt0 范围分别在 15.5Å 和 106.8Å 之间、109.8Å 和 486.1Å 之间以及 725Å 和 3961Å 之间。这些值与实验结果非常吻合。
A theory is developed which allows one to discuss the stability of multiply-twinned particles and to calculate critical sizes for stable and quasi-stable states. An icosahedral particle is essentially stable forr≦riw*, quasi-stable forriw*<r≦rit0and unstable forr>rit0whereris an edge length of the particle, while a decahedral particle is not essentially stable but quasi-stable forr≦rdt0and unstable forr>rdt0. The critical sizesriw*,rit0andrdt0are formulated as functions of the specific surface energy γhkl, the twin boundary energy γt, the elastic strain energyWand the adhesive energy γato the substrate. Calculated critical diameters 2riw*,2rit0and 2rdt0for the particles grown in free space for several elements range between 15.5Å and 106.8Å, between 109.8Å and 486.1Å and between 725Å and 3961Å, respectively. These values are in good agreement with experimental results.