Some studies on the superplastic deformation behavior of nanocrystalline yttria stabilised zirconia based ceramics

• Published in: Scripta materialia Vol. 44; no. 8-9; pp. 1553 - 1556
• Main Authors: BHATTACHARYA, S. S, BETZ, U, HAHN, H
• Format: Conference Proceeding Journal Article
• Language: English
• Published: New York, NY Elsevier Science 18.05.2001
• Subjects: Condensed matter: structure, mechanical and thermal properties; Deformation and plasticity (including yield, ductility, and superplasticity); Exact sciences and technology; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Physics; Interfaces; Zirconia; Superplasticity; Superplastic deformation; Stabilized zirconia; Ceramics; Nanostructures; Experimental study; Activation energy; Nanostructured materials; Yttrium oxides
• ISSN: 1359-6462; 1872-8456
• DOI: 10.1016/S1359-6462(01)00836-3

Superplastic behavior was demonstrated for the first time in fine-grained partially stabilized zirconia by Wakai and co-workers (1986). However, some recent studies (Betz et al., 1997, 1999, and a work submitted) have suggested that stabilized zirconia is also capable of exhibiting superplastic deformation at lower temperatures, particularly when the grain size is well below 100 nm. In this study nanocrystalline 5 mol pct yttria-stabilized partially tetragonal zirconia was synthesized and processed, and the mechanical deformation behavior was characterized with a view towards establishing superplastic flow at relatively low temperatures. (CSA)