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arXiv 1102.3468cond-mat.mtrl-sci
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对“有序-无序界面上的原子尺度结构和化学组成”一文的评论

Comment on "Atomic Scale Structure and Chemical Composition across Order-Disorder Interfaces"

Binghui Ge, Jing Zhu

摘要:

长期以来,界面一直被认为是许多机械和电气性能的关键。镍基高温合金具有优良的蠕变和疲劳性能,广泛应用于涡轮叶片材料,其高温强化能力取决于界面。Srinivasan等人利用高分辨扫描透射电子显微镜(HRSTEM)和三维原子探针(3DAP)层析成像技术,提出了镍基高温合金中γ/γ'界面存在两种不同的界面宽度,一种对应于有序-无序转变,另一种对应于成分转变。我们在这篇评论中对这一结论进行了论证。

英文摘要:

Interfaces have long been known to be the key to many mechanical and electric properties. To nickel base superalloys which have perfect creep and fatigue properties and have been widely used as materials of turbine blades, interfaces determine the strengthening capacities in high temperature. By means of high resolution scanning transmission electron microscopy (HRSTEM) and 3D atom probe (3DAP) tomography, Srinivasan et al. proposed a new point that in nickel base superalloys there exist two different interfacial widths across the γ/γ' interface, one corresponding to an order-disorder transition, and the other to the composition transition. We argue about this conclusion in this comment.

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