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Athermal transformation behaviour and thermal hysteresis at the SiO (sub 2) -alpha /beta -cristobalite phase transition

Wolfgang W. Schmahl
Athermal transformation behaviour and thermal hysteresis at the SiO (sub 2) -alpha /beta -cristobalite phase transition
European Journal of Mineralogy (April 1993) 5 (2): 377-380

Abstract

The alpha - beta phase transition of cristobalite shows a stable and reproducible hysteresis loop with phase coexistence on both slopes. The transition proceeds as a function of T rather than isothermally. The non-thermally-activated (athermal) behaviour is analogous to martensitic transformations in metals and alloys and similar to the hysteresis of 'ferroics' in an applied field. It is suggested that self-pinning by coherency-strain is the cause of the 'thermal' hysteresis of non-quenchable structural phase transitions.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 5
Serial Issue: 2
Title: Athermal transformation behaviour and thermal hysteresis at the SiO (sub 2) -alpha /beta -cristobalite phase transition
Affiliation: Technische Hochschule Darmstadt, Fachgebiet Strukturforschung, Darmstadt, Federal Republic of Germany
Pages: 377-380
Published: 199304
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 4
Accession Number: 1993-010405
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1993
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