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 发布时间:2011/10/13 阅读:49522

During this microstructural changes, the intensity of the diamond 1332 cm-1 peak decreases because the micro-twined regions lead to a gradual disappearance of the well-difined lattice oscillation associated with this peak. In such micro- and nan-crystalline material, the 1140 cm-1 peak is observed. With increasing amounts of micro-twinned areas the intensities of the D-band and the 1470 cm-1 peak increase. The G-band also increases, but in addition its position changes from 1539-1(faceted area) to 1585 cm-1(ballas area).
As indicatied in Fig.8, the micro-twinned areas increase while the facets disappear and the ballas morphology is formed. An intermediate stage of (1 0 0) facets in an unfaceted surrounding can be observed (Fig.5c).
  在显微结构变化过程中,金刚石1332cm-1峰的强度下降,因为显微孪晶区使得与此峰有关的清晰晶格振幅逐渐消失。在这种显微和纳米晶材料中,可以看到 1140cm-1峰。显微孪晶区域越多,D带和1470cm-1峰的强度越高。G带的强度也增大,此外,其位置发生了变化,即从1539cm-1(多面金 刚石区域)变成1585cm-1(半刚石区域)。
3.5.    Ballas morphology   3.5半刚石形貌
Ballas is nearly pure diamond with nano-crystalline structure. The type of defects changes with deposition conditions respectively the at. H/C ratio. With decreasing at. H/C ratio the diamond grain size also decreases and the strongly twinned microstructure is replace by normal or (1 0 0) Σ29 grain boundaries (Fig. 7d).   半刚石几乎是具有纳米晶结构的纯金刚石。缺陷的类型随对应不同H/C比的沉积条件的变化而变化。金刚石晶粒粒度随着H/C比率的减小而减小,明显的孪生显微结构被正常[111]或(100)∑≤29晶粒界面取代(图7d)。

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