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Surprising Results of a Study on the Plasticity in Strontium Titanate
Author(s) -
Brunner Dieter,
TaeriBaghbadrani Shahram,
Sigle Wilfried,
Rühle Manfred
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00805.x
Subject(s) - brittleness , plasticity , materials science , strontium titanate , ceramic , compression (physics) , composite material , condensed matter physics , metallurgy , nanotechnology , physics , thin film
Oxides such as SrTiO 3 are expected to fail via brittle fracture at low temperatures. Surprisingly, in the present study, SrTiO 3 single crystals could be plastically deformed in compression in two temperature ranges: from 78 K to ∼1050 K and from 1500 K to 1800 K. SrTiO 3 was brittle at temperatures between these two ranges (∼1050–1500 K). This phenomenon of a ductile–brittle–ductile transition, together with microstructural investigations, suggests that the role of dislocations in the plasticity of ceramics must be reconsidered.