期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 22, 期 14-15, 页码 2437-2442出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0955-2219(02)00102-4
关键词
mechanical properties; superplastic deformation
The microscopic processes and mechanisms are investigated for the superplastic deformation of 3mol% yttria-partially stabilized tetragonal zirconia polycrystals. Tensile tests are carried out by the use of test specimens with various dimensions in order to examine the specimen size effect on stress-strain curve. The formation and development of surface corrugation on tensile specimens induced during superplastic deformation are carefully studied as a function of tensile strain. New findings, i.e. the specimen size effect and the surface corrugation are discussed in terms of the concept of cooperative grain-boundary sliding as a candidate for superplastic deformation and flow of polycrystalline materials. (C) 2002 Elsevier Science Ltd. All rights reserved.
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