Mechanism of solid-state amorphization of Se induced by mechanical milling

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)7674-7680
Journal / PublicationJournal of Applied Physics
Volume95
Issue number12
Online published4 Jun 2004
Publication statusPublished - 15 Jun 2004
Externally publishedYes

Abstract

In this work, the solid-state amorphization process of elemental trigonal Se via mechanical milling was studied. Trigonal Se has a unique crystal structure consisting of helical [–Se–]n chains with strong intrachain covalent bonds and with weak interchain van der Waals bonds. It was found that the interchain coordination distance increased while the intrachain coordination distance decreased with increasing milling time. The crystalline Se transformed to the amorphous state once the interchain coordination distance reached a critical value. The intrachain coordination distance of amorphous Se continued to decrease with milling time, suggesting that molecular chain length decreased with milling time. Combined with the x-ray absorption near-edge structure calculations, it was concluded that the mechanical milling destroyed the interchain bonds of crystalline Se, resulting in the amorphization, while the intrachain bonds were strengthened during amorphization. The present results support a previous crystallite-destabilization model for solid-state amorphization. © 2004 American Institute of Physics

Citation Format(s)

Mechanism of solid-state amorphization of Se induced by mechanical milling. / Zhao, Y. H.; Zhu, Y. T.; Liu, T.
In: Journal of Applied Physics, Vol. 95, No. 12, 15.06.2004, p. 7674-7680.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review