The martensitic transformation in ceramics - its role in transformation toughening

Kelly, P. M. and Francis Rose, L. R. (2002) The martensitic transformation in ceramics - its role in transformation toughening. Progress in Materials Science, 47 5: 463-557. doi:10.1016/S0079-6425(00)00005-0

Author Kelly, P. M.
Francis Rose, L. R.
Title The martensitic transformation in ceramics - its role in transformation toughening
Journal name Progress in Materials Science   Check publisher's open access policy
ISSN 0079-6425
Publication date 2002-01-01
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1016/S0079-6425(00)00005-0
Volume 47
Issue 5
Start page 463
End page 557
Total pages 95
Place of publication United Kingdom
Publisher Pergamon
Language eng
Subject C1
291302 Physical Metallurgy
680301 Stone, ceramics and clay materials
291404 Ceramics
0913 Mechanical Engineering
Abstract This paper reviews the current knowledge and understanding of martensitic transformations in ceramics - the tetragonal to monoclinic transformation in zirconia in particular. This martensitic transformation is the key to transformation toughening in zirconia ceramics. A very considerable body of experimental data on the characteristics of this transformation is now available. In addition, theoretical predictions can be made using the phenomenological theory of martensitic transformations. As the paper will illustrate, the phenomenological theory is capable of explaining all the reported microstructural and crystallographic features of the transformation in zirconia and in some other ceramic systems. Hence the theory, supported by experiment, can be used with considerable confidence to provide the quantitative data that is essential for developing a credible, comprehensive understanding of the transformation toughening process. A critical feature in transformation toughening is the shape strain that accompanies the transformation. This shape strain, or nucleation strain, determines whether or not the stress-induced martensitic transformation can occur at the tip of a potentially dangerous crack. If transformation does take place, then it is the net transformation strain left behind in the transformed region that provides toughening by hindering crack growth. The fracture mechanics based models for transformation toughening, therefore, depend on having a full understanding of the characteristics of the martensitic transformation and, in particular, on being able to specify both these strains. A review of the development of the models for transformation toughening shows that their refinement and improvement over the last couple of decades has been largely a result of the inclusion of more of the characteristics of the stress-induced martensitic transformation. The paper advances an improved model for the stress-induced martensitic transformation and the strains resulting from the transformation. This model, which separates the nucleation strain from the subsequent net transformation strain, is shown to be superior to any of the constitutive models currently available. (C) 2002 Elsevier Science Ltd. All rights reserved.
Keyword Materials Science, Multidisciplinary
Partially-stabilized Zirconia
R-curve Behavior
Arc-melted Zro2-2mol-percent-y2o3
Alumina Ce-tzp/al2o3 Composites
Stress-induced Transformation
Dicalcium Silicate
Monoclinic Transformation
Zone Shape
Q-Index Code C1

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collection: School of Mechanical & Mining Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 200 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 226 times in Scopus Article | Citations
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Created: Wed, 15 Aug 2007, 04:11:27 EST