Burgers vector of crack tip dislocations in magnesium oxide crystals

Kenji Higashida, Syunji Okazaki, Tatsuya Morikawa, Ryuta Onodera

Research output: Contribution to journalArticle

13 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)967-974
Number of pages8
JournalMaterials Transactions, JIM
Volume39
Issue number9
DOIs
Publication statusPublished - Jan 1 1998

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Magnesium Oxide
Burgers vector
magnesium oxides
Magnesia
crack tips
Dislocations (crystals)
Crack tips
Crystals
Shielding
Metal foil
crystals
Fracture toughness
Electron microscopes
Electric potential
image contrast
fracture strength
shielding
high voltages
foils
electron microscopes

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Burgers vector of crack tip dislocations in magnesium oxide crystals. / Higashida, Kenji; Okazaki, Syunji; Morikawa, Tatsuya; Onodera, Ryuta.

In: Materials Transactions, JIM, Vol. 39, No. 9, 01.01.1998, p. 967-974.

Research output: Contribution to journalArticle

Higashida, Kenji ; Okazaki, Syunji ; Morikawa, Tatsuya ; Onodera, Ryuta. / Burgers vector of crack tip dislocations in magnesium oxide crystals. In: Materials Transactions, JIM. 1998 ; Vol. 39, No. 9. pp. 967-974.
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