UNSPECIFIED (1994) STUDY OF THE FERROELASTIC TRANSFORMATION IN ZIRCONIA BY NEUTRON-DIFFRACTION. PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 69 (3). pp. 499-507. ISSN 0141-8637

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Abstract

Neutron diffraction studies of tetragonal zirconia polycrystals subjected to various applied uniaxial stresses indicate that a ferroelastic crystalline transformation occurs within the bulk of the material. The critical coercive stress is determined to be 1.65+/-0.03 GPa. The results agree well with previous reports concerning the ferroelasticity of tetragonal zirconia, but they are the first direct evidence indicating that the anomalies observed using the first X-ray diffraction studies originate from the bulk of the ceramic and not solely from the surface. The preferred orientation observed in the tetragonal crystallites was measured as a function of applied uniaxial stress and interpreted via a resolved stress criterion. It is believed that the ferroelastic transformation can act as an energy-absorbing mechanism and hence toughen zirconia or ceramics containing dispersed zirconia.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery Q Science > QC Physics
Journal or Publication Title:	PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES
Publisher:	TAYLOR & FRANCIS LTD
ISSN:	0141-8637
Date:	March 1994
Volume:	69
Number:	3
Number of Pages:	9
Page Range:	pp. 499-507
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/20753

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