Transformation toughening in an antiferroelectric ceramic
نویسندگان
چکیده
منابع مشابه
Transformation toughening in an antiferroelectric ceramic
Due to a larger specific volume of the ferroelectric phase, the antiferroelectric-ferroelectric transition is believed to have an enhanced toughening effect against fracture. The toughening requires a non-recoverable transformation in the crack process zone. Complementary measurement of the crystal symmetry, dielectric constant, field-induced polarization, and Raman spectrum on ceramic Pb0.99Nb...
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Assuming that the energy dissipation decreases inversely with distance from the crack tip, the increase in steady-state toughness of a transformation-toughened ceramic is estimated to be AJ = (AJ,/w) In (1 + w), where (i) AJo denotes the toughness increment which would be expected for a given zone height h , assuming full transformation throughout the zone, and (ii) w is a nondimensional parame...
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ژورنال
عنوان ژورنال: Acta Materialia
سال: 2014
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2013.09.038