Indentation recovery in GdPO 4 and observation of deformation twinning

Wilkinson, Taylor M.; Musselman, Matthew A.; Boatner, Lynn A.; Diercks, David R.; Packard, Corinne E.

doi:10.1063/1.4964356

Title: Indentation recovery in GdPO ₄ and observation of deformation twinning

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Abstract

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. Finally, 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.

Authors:

Wilkinson, Taylor M.;

;

; Diercks, David R.;

Publication Date:: Thu Sep 01 00:00:00 EDT 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Colorado School of Mines, Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:: 1327558

Alternate Identifier(s):: OSTI ID: 1327665; OSTI ID: 1420518

Grant/Contract Number:: AC05-00OR22725; DMR-1352499

Resource Type:: Published Article

Journal Name:: AIP Advances

Additional Journal Information:: Journal Name: AIP Advances Journal Volume: 6 Journal Issue: 9; Journal ID: ISSN 2158-3226

Publisher:: American Institute of Physics

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; polycrystals; hardness; nanotechnology; phase transitions; single crystals

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                    Wilkinson, Taylor M., Musselman, Matthew A., Boatner, Lynn A., Diercks, David R., and Packard, Corinne E. Indentation recovery in GdPO 4 and observation of deformation twinning.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4964356.

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                    Wilkinson, Taylor M., Musselman, Matthew A., Boatner, Lynn A., Diercks, David R., & Packard, Corinne E. Indentation recovery in GdPO 4 and observation of deformation twinning.  United States.  https://doi.org/10.1063/1.4964356

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                    Wilkinson, Taylor M., Musselman, Matthew A., Boatner, Lynn A., Diercks, David R., and Packard, Corinne E. Thu .  
"Indentation recovery in GdPO 4 and observation of deformation twinning".  United States.  https://doi.org/10.1063/1.4964356.

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@article{osti_1327558,

  title        = {Indentation recovery in GdPO 4 and observation of deformation twinning},

  author       = {Wilkinson, Taylor M. and Musselman, Matthew A. and Boatner, Lynn A. and Diercks, David R. and Packard, Corinne E.},

  abstractNote = {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. Finally, 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.},

  doi          = {10.1063/1.4964356},

  journal      = {AIP Advances},

  number       = 9,

  volume       = 6,

  place        = {United States},

  year         = {Thu Sep 01 00:00:00 EDT 2016},

  month        = {Thu Sep 01 00:00:00 EDT 2016}

}

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Title: Indentation recovery in GdPO 4 and observation of deformation twinning

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Title: Indentation recovery in GdPO ₄ and observation of deformation twinning