Burgers Vector of Crack Tip Dislocations in Magnesium Oxide Crystals

• Higashida Kenji

  Department of Materials Science and Engineering, Kyushu University

• Okazaki Syunji

  Department of Materials Science and Engineering, Kyushu University

• Morikawa Tatsuya

  Department of Materials Science and Engineering, Kyushu University

• Onodera Ryuta

  Department of Materials Science and Engineering, Kyushu University

Bibliographic Information

Other Title

• Burgers Vector of Crack Tip Dislocation

Abstract

Crack tip dislocations in MgO thin crystals have been investigated using a high voltage electron microscope (HVEM). Particular emphasis is laid on determining the sign of the Burgers vectors of those dislocations, because it is essentially important for understanding the fracture toughness of materials. For this determination, image simulation for a dislocation inclined to the foil surface has been performed, and characteristics of image contrast are discussed. Crack tip shielding due to dislocations is also discussed briefly.

Journal

• Materials Transactions, JIM

  Materials Transactions, JIM 39 (9), 967-974, 1998

  The Japan Institute of Metals

Keywords

• high voltage electron microscopy
• Burgers vector
• dislocation
• crack
• shielding
• fracture
• toughness
• MgO
• image simulation

Details

• CRID: 1390001204246210304
• NII Article ID: 130003422576
• NII Article ID: 10003804124
• NII Book ID: AA10699969
• DOI: 10.2320/matertrans1989.39.967
• COI: 1:CAS:528:DyaK1cXnt1OktL4%3D
• ISSN: 2432471X
• ISSN: 09161821
• NDL BIB ID: 4583312
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4583312
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1989/39/9/39_9_967/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed