A modified Rietveld method to model highly anisotropic ceramics

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1494-1502
Number of pages9
JournalActa Materialia
Volume60
Issue number4
DOIs
Publication statusPublished - Feb 2012
Externally publishedYes

Keywords

  • Piezoelectricity
  • Rietveld
  • X-ray diffraction

Fingerprint

Dive into the research topics of 'A modified Rietveld method to model highly anisotropic ceramics'. Together they form a unique fingerprint.

Cite this