Methods for determining precise values of antiphase boundary energies in Ni3Al
Methods for determining precise values of antiphase boundary energies in Ni3Al
复制标题
确定 Ni3Al 中反相边界能精确值的方法
DOI：
10.1080/09500839108214629
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发表时间：
1991
影响因子：
1.2
通讯作者：
K. Hemker
中科院分区：
文献类型：
--
作者：
N. Baluc;R. Schäublin;K. Hemker
翻译后摘要这项工作的目的是在确定使用图像模拟程序时，计算故障的位错解离，已使用弱束透射电子显微镜（WB-TEM）测量的能量的重要性。它包含了反相边界能（γAPB）的比较，计算使用：测量但未校正的解离距离，解离校正的Cockayne的方法，和解离校正使用最近开发的WB图像模拟程序。结果表明，对于Ni_3（Al，1%Ta），修正量可达20%。此外，它们表明这些校正对于（111）和（010）原子平面是不同的，并且需要WB图像模拟来预测和建模这种各向异性行为。这些观察结果表明，为了确定各向异性材料中堆垛层错能和反相边界能的精确值，WB TEM测量应辅以WB图像模拟
Abstract This work is aimed at determining the importance of using image simulation programs when calculating fault energies from dislocation dissociations that have been measured using weak beam transmission electron microscopy (WB-TEM). It contains a comparison of antiphase boundary energies (γAPB) that were calculated using: measured but uncorrected dissociation distances, dissociations corrected by the method of Cockayne, and dissociations corrected using a recently developed WB image simulation program. The results indicate that, for Ni3(Al, 1%Ta), corrections can be as large as 20%. Moreover, they indicate that these corrections are different for the (111) and (010) atomic planes and that WB image simulations are needed to predict and model this anisotropic behaviour. These observations suggest that WB-TEM measurements should be supplemented with WB image simulations in order to determine precise values of stacking fault and antiphase boundary energies in anisotropic materials