Indentation recovery in GdPO4 and observation of deformation twinning | Zendy

Taylor M. Wilkinson | Zendy; Matthew Musselman | Zendy; L. A. Boatner | Zendy; David R. Diercks | Zendy; Corinne E. Packard | Zendy

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Indentation recovery in GdPO4 and observation of deformation twinning

Author(s) -

Taylor M. Wilkinson,

Matthew Musselman,

L. A. Boatner,

David R. Diercks,

Corinne E. Packard

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4964356

Subject(s) - indentation , nanoindentation , crystallite , crystal twinning , deformation (meteorology) , monazite , materials science , deformation mechanism , stacking , crystallography , composite material , mineralogy , geology , metallurgy , microstructure , chemistry , geochemistry , zircon , organic chemistry

A series of nanoindentation tests on both single and polycrystalline specimens of a monazite rare-earth orthophosphate, GdPO4, revealed frequent observation of anomalous unloading behavior with a large degree of recovery, where previously this behavior had only been observed in xenotime-structure rare-earth orthophosphates. An indentation site in the polycrystalline sample was examined using TEM to identify the deformation mechanism responsible for recovery. The presence of a twin along the (100) orientation, along with a series of stacking faults contained within the deformation site, provide evidence that the mechanism of recovery in GdPO4 is the collapse of deformation twins during unloading

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