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Kinetics of mechanically induced anatase-to-rutile phase transformations under inelastic impact conditions

Napolitano, Emilio and Mulas, Gabriele Raimondo Celestino and Enzo, Stefano and Delogu, Francesco (2010) Kinetics of mechanically induced anatase-to-rutile phase transformations under inelastic impact conditions. Acta Materialia, Vol. 58 (10), p. 3798-3804. ISSN 1359-6454. Article.

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DOI: 10.1016/j.actamat.2010.03.024

Abstract

This work investigates the kinetics of the anatase-to-rutile phase transformation of TiO2 powders during ball milling. Two elementary stages are observed, namely the transformation of anatase to the TiO2 II phase and of this latter to rutile. Such consecutive reactions were studied under inelastic impact regimes. Based on a suitable modeling of transformation kinetics, the fraction of powder processed on average at each collision was estimated. The mass of powder involved in phase transformation and microstructural refinement processes at each collision was then worked out by a systematic variation of the powder charge inside the reactor.

Item Type:Article
ID Code:5620
Status:Published
Refereed:Yes
Uncontrolled Keywords:Mechanical milling, crystalline oxides, phase transformation kinetics
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Pergamon / Elsevier
ISSN:1359-6454
Copyright Holders:© 2010 Acta Materialia Inc. Published by Elsevier
Deposited On:09 Mar 2011 10:29

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