Strain Evolution of Highly Asymmetric Polycrystalline Ferroelectric Ceramics via a Self-Consistent Model and In Situ X-Ray Diffraction

Tutuncu G., Motahari M., BERNIER J., Varlioglu M., Jones J. L., Ustundag E.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, cilt.95, sa.12, ss.3947-3954, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 95 Sayı: 12
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1111/jace.12011
  • Dergi Adı: JOURNAL OF THE AMERICAN CERAMIC SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.3947-3954
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

Strain and texture evolution (domain switching) of polycrystalline, ferroelectric BaTiO3 was investigated in four-point bending geometry. Lattice strains were measured by in situ synchrotron X-ray diffraction to address problems related to modeling the constitutive behavior of highly asymmetric ferroelectrics. The hkl-dependent strain measured by X-ray diffraction was found to be smaller relative to both bulk strain measured by conventional, contact-based techniques and elastically computed strain, and reasons for this inconsistency are discussed. A self-consistent model with capabilities of quantifying domain switching and estimating hkl-dependent strain is applied to allow a direct comparison with diffraction data.