Structure and Configuration of Boundary Dislocations on Low Angle Tilt Grain Boundaries in Alumina

• Nakamura Atsutomo

  Graduate School of Engineering, Osaka City University

• Tochigi Eita

  Institute of Engineering Innovation, The University of Tokyo

• Shibata Naoya

  Institute of Engineering Innovation, The University of Tokyo

• Yamamoto Takahisa

  Institute of Engineering Innovation, The University of Tokyo

• Ikuhara Yuichi

  Institute of Engineering Innovation, The University of Tokyo WPI, Tohoku University

Abstract

Structure and configuration of boundary dislocations on various low angle tilt grain boundaries in alumina were considered based on the ideas that the boundary is composed of regularly arrayed edge dislocations and that the dislocations could dissociate into partial dislocations with maintaining the hcp-like oxygen sublattice. Moreover, the separation distance between the partial dislocations formed by the dissociation was evaluated by the calculations based on an elastic theory. The calculations indicated that the width of the stacking fault region between partial dislocations decreases with increasing tilt angles. As a consequence, the hypothesis and calculations used here would enable us to predict the structures of various low angle boundaries with dissociated boundary dislocations.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 50 (5), 1008-1014, 2009

  The Japan Institute of Metals and Materials

Keywords

• sapphire
• low angle grain boundary
• partial dislocation
• multiple dissociation

Details

• CRID: 1390282679226051968
• NII Article ID: 10024814394
• NII Article ID: 130004454209
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mc200821
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 10214061
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10214061
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/50/5/50_MC200821/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed