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Titolo:
RAPID CRYSTALLIZATION OF AMORPHOUS CO-ZR AND FE-B CLOSE TO EUTECTIC COMPOSITIONS
Autore:
FISCHER HE; BRAUER S; ZALUSKA A; SUTTON M; STROMOLSEN JO; STEPHENSON GB;
Indirizzi:
MCGILL UNIV,CTR PHYS MAT,3600 UNIV ST MONTREAL H3A 2T8 QUEBEC CANADA IBM CORP,THOMAS J WATSON RES CTR YORKTOWN HTS NY 10598 MCGILL UNIV,DEPT PHYS MONTREAL H3A 2T8 QUEBEC CANADA
Titolo Testata:
Materials science & engineering. A, Structural materials: properties, microstructure and processing
, volume: 179, anno: 1994,
pagine: 396 - 400
SICI:
0921-5093(1994)179:<396:RCOACA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
INSITU X-RAY; GLASSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
H.E. Fischer et al., "RAPID CRYSTALLIZATION OF AMORPHOUS CO-ZR AND FE-B CLOSE TO EUTECTIC COMPOSITIONS", Materials science & engineering. A, Structural materials: properties, microstructure and processing, 179, 1994, pp. 396-400

Abstract

We present in situ time-resolved X-ray scattering data and transmission electron microscopy studies on ribbons of Co92Zr8 and Fe81.5B18.5. Both systems exhibit a profound change as the crystallization temperature, and hence transformation rate, is raised. At low temperatures (half-time t1/2 for crystallization of the order of minutes), crystallization occurs by eutectic growth of two crystalline phases; at high rates (t1/2 of the order of seconds) the mode changes to simultaneous polymorphic crystallization of the two phases, with no eutectic growth. Itis suggested that the change of mode occurs when the temperature exceeds the glass transition temperature.

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Documento generato il 19/09/20 alle ore 15:29:56