Microstructural observations on 1:2 ordered domain boundaries in Ba(Mg1/3Ta2/3)O3

Hwack Joo Lee, Hyun Ryu, Sahn Nahm, Jae Dong Byun

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

High resolution transmission electron microscopy (HRTEM) has been used to investigate the detailed microstructures of the antiphase boundaries (APBs) of 1:2 B-site ordered domains in fully ordered Ba(Mg1/3Ta2/3)O3 ceramic compound. The orientation relationship (102)I // (012)II, [010]I // [100]II, was found between two domains. The ledged coherent interface has formed with (101) plane as an atomic habit plane. The growth ledge which possesses the kinks on ledge structure on the riser has the height of 1.22 nm which is equivalent to three (101) planes. The coalescence of the growth ledges and the generation of these ledges at the structurally faulted region had been found experimentally. New interface model which was coherent and had a growth ledge was constructed based on the experimentally obtained diffraction pattern and HRTEM images and thereafter the lateral growth by the ledge mechanism in the coarsening of ordered phase boundaries was proposed.

Original languageEnglish
Pages (from-to)103-110
Number of pages8
JournalMetals and Materials International
Volume4
Issue number2
DOIs
Publication statusPublished - 1998

Keywords

  • 1:2 ordering
  • Antiphase boundary
  • BMT
  • Coarsening
  • Complex perovskite
  • Ledged structure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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