A modified Rietveld method to model highly anisotropic ceramics

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

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: Dergiye katkıMakalebilirkişi

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 dilİngilizce
Sayfa (başlangıç-bitiş)1494-1502
Sayfa sayısı9
DergiActa Materialia
Hacim60
Basın numarası4
DOI'lar
Yayın durumuYayınlandı - Şub 2012
Harici olarak yayınlandıEvet

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