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Ion Irradiation of Ternary Pyrochlores

Published online by Cambridge University Press:  20 February 2017

Karl R. Whittle ,
Katherine L. Smith ,
Mark G. Blackford ,
Simon A.T. Redfern ,
Elizabeth J. Harvey ,
Nestor J. Zaluzec  and
Gregory R. Lumpkin
Karl R. Whittle
Affiliation:
Institute of Materials Engineering, Australian Nuclear Science and Technology Organisation, PMB1, Menai, NSW 2234, Australia
Katherine L. Smith
Affiliation:
Institute of Materials Engineering, Australian Nuclear Science and Technology Organisation, PMB1, Menai, NSW 2234, Australia
Mark G. Blackford
Affiliation:
Institute of Materials Engineering, Australian Nuclear Science and Technology Organisation, PMB1, Menai, NSW 2234, Australia
Simon A.T. Redfern
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom
Elizabeth J. Harvey
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom
Nestor J. Zaluzec
Affiliation:
Materials Science Division, Argonne National Laboratory, Chicago, Illinois, USA
Gregory R. Lumpkin
Affiliation:
Institute of Materials Engineering, Australian Nuclear Science and Technology Organisation, PMB1, Menai, NSW 2234, Australia
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Abstract

Synthetic pyrochlore samples Y2Ti2-xSnxO7 (x=0.4, 0.8, 1.2, 1.6), Nd2Zr2O7, Nd2Zr1.2Ti0.8O7, and La1.6Y0.4Hf2O7, were irradiated in-situ using the IVEM-TANDEM microscope facility at the Argonne National Laboratory. The critical temperatures for amorphisation have revealed a dramatic increase in tolerance with increasing Sn content for the Y2Ti2-xSnxO7 series. This change has also found to be linear with increasing Sn content. Nd2Zr1.2Ti0.8O7 and La1.6Y0.4Hf2O7 were both found to amorphise, while Nd2Zr2O7 was found to be stable to high doses (2.5×10^15 ions cm-2). The observed results are presented with respect to previously published results for irradiation stability predictions and structural disorder.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1122: Symposium O – Structure/Property Relationships in Fluorite-Derivative Compounds , 2008 , 1122-O08-03
Copyright
Copyright © Materials Research Society 2009

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