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In situ pressure Raman spectroscopy and mechanical stability of superhard boron suboxide
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View: Figures


Image of FIG. 1.
FIG. 1.

Raman spectrum of rhombohedral collected at ambient conditions. Insets also include the previous Raman data (∣) (Ref. 5), the structure of ideal with space group , and the Raman mode assignments.

Image of FIG. 2.
FIG. 2.

(a) High-pressure Raman spectra of to ; (b) The pressure dependence of several typical Raman modes marked with an asterisk. Owing to the overlapping effect of the highest frequency mode with the diamond peak above , the mode-pressure profiles are only plotted under for better comparison.

Image of FIG. 3.
FIG. 3.

Raman spectra of upon release of pressure to ambient conditions. The observed phase transformation is also marked.

Image of FIG. 4.
FIG. 4.

Raman spectrum of the recovered collected at atmosphere pressure. The Raman modes previously observed from and B polycrystals and their amorphous polymorphs are also marked below for better comparison (Refs. 10–15). The underlined symbols represent the strong Raman modes from the corresponding solids. The inset shows the Raman spectra of starting and recovered samples for elucidation of their difference.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: In situ pressure Raman spectroscopy and mechanical stability of superhard boron suboxide