Raman spectroscopy as a probe for in situ studies of pressure‐induced amorphization: some illustrative examples

• DOI: 10.1002/jrs.1034
• Publication Date: 2003-08-22T13:24:34Z
• Authors: A. S. Pereira; C. A. Perottoni; J. A. H. da Jornada
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract The main models proposed in the literature to describe pressure‐induced amorphization (PIA) are briefly reviewed, with special emphasis on kinetic aspects of PIA. high potential Raman spectroscopy for experimental studies PIA is highlighted and illustrated by results obtained zirconium tungstate (ZrW 2 O 8 ) boric acid (H 3 BO ). Compared x‐ray diffraction using a conventional tube, allowed much faster identification transitions both compounds. Further, ZrW have given support an mechanism based freezing low‐energy vibrational modes associated rigid (or quasi‐rigid) ZrO 6 WO 4 polyhedral units. For H , we strong evidence hindered decomposition probably mixture HBO O. short acquisition time measurements samples under pressure enabled us follow kinetics transition which could hardly be done diffraction. proved very convenient technique study mechanisms behind PIA, owing not only fast information about phase kinetics, but also structural that can obtained. Copyright © 2003 John Wiley & Sons, Ltd.