BURGERS VECTOR OF CRACK-TIP DISLOCATIONS IN MAGNESIUM-OXIDE CRYSTALS

Citation
K. Higashida et al., BURGERS VECTOR OF CRACK-TIP DISLOCATIONS IN MAGNESIUM-OXIDE CRYSTALS, Materials transactions, JIM, 39(9), 1998, pp. 967-974
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Metallurgy & Metallurigical Engineering","Material Science
Journal title
ISSN journal
0916-1821
Volume
39
Issue
9
Year of publication
1998
Pages
967 - 974
Database
ISI
SICI code
0916-1821(1998)39:9<967:BVOCDI>2.0.ZU;2-I
Abstract
Crack tip dislocations in MgO thin crystals have been investigated usi ng a high voltage electron microscope (HVEM). Particular emphasis is l aid on determining the sign of the Burgers vectors of those dislocatio ns, 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 ch aracteristics of image contrast are discussed. Crack tip shielding due to dislocations is also discussed briefly.