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Tetragonal-to-mono clinic phase transformation in CeO2-stabilised zirconia under uniaxial loading

Rauchs, Gaston; Fett, Theo; Munz, Dietrich; Oberacker, Rainer

Abstract:
The critical transformation stresses of five 9 mol% Ce-TZP materials
with different grain sizes have been investigated in bending. It was
found that two different types of phase transformation mechanisms occur
in these materials. a) A homogeneous phase transformation with a
transformation strain increasing continuously with increasing applied
stress. This transformation type produces the initial deviation from
linear-elastic material behaviour in the stress-strain curves. (b) An
autocatalytic phase transformation with the autocatalytic formation of
transformation bands, leading to a strongly inhomogeneous, localised
distribution of the monoclinic phase. Their locations and sizes vary
randomly. The formation of the transformation bands has been monitored
by acoustic emission recording. The amount of monoclinic phase content
has been quantified by X-ray diffractometry and Raman spectroscopy. (


Zugehörige Institution(en) am KIT Institut für Keramik im Maschinenbau (IKM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2001
Sprache Englisch
Identifikator ISSN: 0955-2219
KITopen ID: 1000007689
Erschienen in Journal of the European Ceramic Society
Band 21
Heft 12
Seiten 2229-2241
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