A modified Rietveld method to model highly anisotropic ceramics

G. Tutuncu; M. Motahari; M. R. Daymond; E. Ustundag

doi:10.1016/j.actamat.2011.11.050

A modified Rietveld method to model highly anisotropic ceramics

G. Tutuncu^*
, M. Motahari
, M. R. Daymond
, E. Ustundag

^*Bu çalışma için yazışmadan sorumlu yazar

Iowa State University
University of Florida
Queen's University Kingston

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

10 Atıf (Scopus)

Özet

High energy X-ray diffraction was employed to probe the complex constitutive behavior of a polycrystalline ferroelectric material in various sample orientations. Pb(Zn,Nb)O ₃-Pb(Zr,Ti)O ₃ (PZN-PZT) ceramics were subjected to a cyclic bipolar electric field while diffraction patterns were taken. Using transmission geometry and a two-dimensional detector, lattice strain and texture evolution (domain switching) were measured in multiple sample directions simultaneously. In addition, texture analysis suggests that non-180° domain switching is coupled with lattice strain evolution during uniaxial electrical loading. As a result of this material's high strain anisotropy, the full-pattern Rietveld method was inadequate to analyze the diffraction data. Instead, a modified Rietveld method, which includes an elastic anisotropy term, yielded significant improvements in the data analysis results.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	1494-1502
Sayfa sayısı	9
Dergi	Acta Materialia
Hacim	60
Basın numarası	4
DOI'lar	https://doi.org/10.1016/j.actamat.2011.11.050
Yayın durumu	Yayınlandı - Şub 2012
Harici olarak yayınlandı	Evet

Finansman

This research was partially supported by an NSF-CAREER Award (DMR-9985264) and the DOE Ames Laboratory. Use of the APS was supported by the DOE under Contract No. W-31-109-ENG-38. The authors would like to extend their gratitude to David Cann for providing samples, and Sven Vogel, Douglas Robinson, Jacob L. Jones and David Weldon for technical assistance and helpful suggestions.

Finansörler	Finansör numarası
NSF-CAREER	DMR-9985264
U.S. Department of Energy
Ames Laboratory

Belgeye Erişim

10.1016/j.actamat.2011.11.050

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "A modified Rietveld method to model highly anisotropic ceramics",

abstract = "High energy X-ray diffraction was employed to probe the complex constitutive behavior of a polycrystalline ferroelectric material in various sample orientations. Pb(Zn,Nb)O 3-Pb(Zr,Ti)O 3 (PZN-PZT) ceramics were subjected to a cyclic bipolar electric field while diffraction patterns were taken. Using transmission geometry and a two-dimensional detector, lattice strain and texture evolution (domain switching) were measured in multiple sample directions simultaneously. In addition, texture analysis suggests that non-180° domain switching is coupled with lattice strain evolution during uniaxial electrical loading. As a result of this material's high strain anisotropy, the full-pattern Rietveld method was inadequate to analyze the diffraction data. Instead, a modified Rietveld method, which includes an elastic anisotropy term, yielded significant improvements in the data analysis results.",

keywords = "Piezoelectricity, Rietveld, X-ray diffraction",

author = "G. Tutuncu and M. Motahari and Daymond, \{M. R.\} and E. Ustundag",

year = "2012",

month = feb,

doi = "10.1016/j.actamat.2011.11.050",

language = "English",

volume = "60",

pages = "1494--1502",

journal = "Acta Materialia",

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TY - JOUR

T1 - A modified Rietveld method to model highly anisotropic ceramics

AU - Tutuncu, G.

AU - Motahari, M.

AU - Daymond, M. R.

AU - Ustundag, E.

PY - 2012/2

Y1 - 2012/2

N2 - High energy X-ray diffraction was employed to probe the complex constitutive behavior of a polycrystalline ferroelectric material in various sample orientations. Pb(Zn,Nb)O 3-Pb(Zr,Ti)O 3 (PZN-PZT) ceramics were subjected to a cyclic bipolar electric field while diffraction patterns were taken. Using transmission geometry and a two-dimensional detector, lattice strain and texture evolution (domain switching) were measured in multiple sample directions simultaneously. In addition, texture analysis suggests that non-180° domain switching is coupled with lattice strain evolution during uniaxial electrical loading. As a result of this material's high strain anisotropy, the full-pattern Rietveld method was inadequate to analyze the diffraction data. Instead, a modified Rietveld method, which includes an elastic anisotropy term, yielded significant improvements in the data analysis results.

AB - High energy X-ray diffraction was employed to probe the complex constitutive behavior of a polycrystalline ferroelectric material in various sample orientations. Pb(Zn,Nb)O 3-Pb(Zr,Ti)O 3 (PZN-PZT) ceramics were subjected to a cyclic bipolar electric field while diffraction patterns were taken. Using transmission geometry and a two-dimensional detector, lattice strain and texture evolution (domain switching) were measured in multiple sample directions simultaneously. In addition, texture analysis suggests that non-180° domain switching is coupled with lattice strain evolution during uniaxial electrical loading. As a result of this material's high strain anisotropy, the full-pattern Rietveld method was inadequate to analyze the diffraction data. Instead, a modified Rietveld method, which includes an elastic anisotropy term, yielded significant improvements in the data analysis results.

KW - Piezoelectricity

KW - Rietveld

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/84856183661

U2 - 10.1016/j.actamat.2011.11.050

DO - 10.1016/j.actamat.2011.11.050

M3 - Article

AN - SCOPUS:84856183661

SN - 1359-6454

VL - 60

SP - 1494

EP - 1502

JO - Acta Materialia

JF - Acta Materialia

IS - 4

ER -

A modified Rietveld method to model highly anisotropic ceramics

Özet

Finansman

Belgeye Erişim

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