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Phase Transitions
A Multinational Journal
Volume 86, 2013 - Issue 1: Domain Boundary Engineering in Functional Oxides
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Original Articles

Interfaces in metamict titanite: the macroscopic mechanical properties after stepwise annealing

T. Beirau Department of Earth Sciences, University of Hamburg, 20146 Hamburg, Germany
,
P. Guglielmi Institute of Advanced Ceramics, Technical University Hamburg-Harburg, 21073 Hamburg, Germany
,
C. Paulmann Department of Earth Sciences, University of Hamburg, 20146 Hamburg, Germany
,
G.A. Schneider Institute of Advanced Ceramics, Technical University Hamburg-Harburg, 21073 Hamburg, Germany
,
L.A. Groat Department of Earth and Ocean Sciences, University of British Columbia, British Columbia, Vancouver BC, Canada
,
T. Malcherek Department of Earth Sciences, University of Hamburg, 20146 Hamburg, Germany
,
E.K.H. Salje Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK
&
U. Bismayer Department of Earth Sciences, University of Hamburg, 20146 Hamburg, GermanyCorrespondence[email protected]
 show all
Pages 23-32 | Accepted 14 May 2012, Published online: 21 Jun 2012
 
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Abstract

Elastic material properties of metamict titanite (sample E2312) during thermally induced stepwise recrystallization are measured using nanoindentation. Changes of the elastic modulus (E) and the hardness (H) are related to increasing long-range order and vanishing amorphous interface areas. Metamict titanite shows H and E values close to titanite glass. H decreases on annealing until ca. 950 K to 9.08 GPa and increases at higher temperatures, while E increases continuously on annealing up to ca. 168.4 GPa at 1220 K. Crystalline titanite from Rauris shows strong anisotropy and H and E values are clearly larger than those of E2312.

Acknowledgements

T. Beirau und U. Bismayer acknowledge financial support by the DFG.

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