Strain engineered pyrochlore at high pressure

Abstract Strain engineering is a promising method for next-generation materials processing techniques. Here, we use mechanical milling and annealing followed by compression in diamond anvil cell to tailor the intrinsic and extrinsic strain in pyrochlore, Dy2Ti2O7 and Dy2Zr2O7. Raman spectroscopy, X-...

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Autores principales:	Dylan R. Rittman, Katlyn M. Turner, Sulgiye Park, Antonio F. Fuentes, Changyong Park, Rodney C. Ewing, Wendy L. Mao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a112705d991542378b0c333923486d39
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spelling	oai:doaj.org-article:a112705d991542378b0c333923486d392021-12-02T15:05:30ZStrain engineered pyrochlore at high pressure10.1038/s41598-017-02637-92045-2322https://doaj.org/article/a112705d991542378b0c333923486d392017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02637-9https://doaj.org/toc/2045-2322Abstract Strain engineering is a promising method for next-generation materials processing techniques. Here, we use mechanical milling and annealing followed by compression in diamond anvil cell to tailor the intrinsic and extrinsic strain in pyrochlore, Dy2Ti2O7 and Dy2Zr2O7. Raman spectroscopy, X-ray pair distribution function analysis, and X-ray diffraction were used to characterize atomic order over short-, medium-, and long-range spatial scales, respectively, under ambient conditions. Raman spectroscopy and X-ray diffraction were further employed to interrogate the material in situ at high pressure. High-pressure behavior is found to depend on the species and concentration of defects in the sample at ambient conditions. Overall, we show that defects can be engineered to lower the phase transformation onset pressure by ~50% in the ordered pyrochlore Dy2Ti2O7, and lower the phase transformation completion pressure by ~20% in the disordered pyrochlore Dy2Zr2O7. These improvements are achieved without significantly sacrificing mechanical integrity, as characterized by bulk modulus.Dylan R. RittmanKatlyn M. TurnerSulgiye ParkAntonio F. FuentesChangyong ParkRodney C. EwingWendy L. MaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dylan R. Rittman Katlyn M. Turner Sulgiye Park Antonio F. Fuentes Changyong Park Rodney C. Ewing Wendy L. Mao Strain engineered pyrochlore at high pressure
description	Abstract Strain engineering is a promising method for next-generation materials processing techniques. Here, we use mechanical milling and annealing followed by compression in diamond anvil cell to tailor the intrinsic and extrinsic strain in pyrochlore, Dy2Ti2O7 and Dy2Zr2O7. Raman spectroscopy, X-ray pair distribution function analysis, and X-ray diffraction were used to characterize atomic order over short-, medium-, and long-range spatial scales, respectively, under ambient conditions. Raman spectroscopy and X-ray diffraction were further employed to interrogate the material in situ at high pressure. High-pressure behavior is found to depend on the species and concentration of defects in the sample at ambient conditions. Overall, we show that defects can be engineered to lower the phase transformation onset pressure by ~50% in the ordered pyrochlore Dy2Ti2O7, and lower the phase transformation completion pressure by ~20% in the disordered pyrochlore Dy2Zr2O7. These improvements are achieved without significantly sacrificing mechanical integrity, as characterized by bulk modulus.
format	article
author	Dylan R. Rittman Katlyn M. Turner Sulgiye Park Antonio F. Fuentes Changyong Park Rodney C. Ewing Wendy L. Mao
author_facet	Dylan R. Rittman Katlyn M. Turner Sulgiye Park Antonio F. Fuentes Changyong Park Rodney C. Ewing Wendy L. Mao
author_sort	Dylan R. Rittman
title	Strain engineered pyrochlore at high pressure
title_short	Strain engineered pyrochlore at high pressure
title_full	Strain engineered pyrochlore at high pressure
title_fullStr	Strain engineered pyrochlore at high pressure
title_full_unstemmed	Strain engineered pyrochlore at high pressure
title_sort	strain engineered pyrochlore at high pressure
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a112705d991542378b0c333923486d39
work_keys_str_mv	AT dylanrrittman strainengineeredpyrochloreathighpressure AT katlynmturner strainengineeredpyrochloreathighpressure AT sulgiyepark strainengineeredpyrochloreathighpressure AT antonioffuentes strainengineeredpyrochloreathighpressure AT changyongpark strainengineeredpyrochloreathighpressure AT rodneycewing strainengineeredpyrochloreathighpressure AT wendylmao strainengineeredpyrochloreathighpressure
_version_	1718388784565846016

Strain engineered pyrochlore at high pressure

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