Volume 109, Number 1, 2012Topical issue on "Metallic glasses and related composites"
|Page(s)||21 - 26|
|Published online||13 March 2012|
Cooling rate and situation of the glass-forming border in the GeSe2-Sb2Te3-PbSb2Te4 system
Department of Non-Ferrous Metals Metallurgy and Semiconductors
Technology, University of Chemical Technology and Metallurgy – Sofia,
8 Kliment Ohridsky Blvd.,
Received: 12 December 2011
Accepted: 1 February 2012
The glass-forming ability of chalcogenide glasses from the GeSe2-Sb2Te3-PbSb2Te4 system is investigated at different cooling rates. The samples are synthesized by direct synthesis in evacuated quartz ampoules from the initial compounds and quenched in air, water, water+ice+NaCl and liquid nitrogen with cooling rates of 3, 9, 34 and 400 K/s, respectively. The obtained bulks are characterized by visual and X-ray diffraction analyses. The critical cooling rate for obtaining chalcogenide glasses from the investigated system is 34 K/s. Above this rate the border between the glassy and crystalline phases shows a tendency towards narrowing of the glass-forming region.
Key words: Cooling rate / glass-forming region / X-ray diffraction
© EDP Sciences 2012
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