Abstract

The possibility of superplastic tensile deformation in nanocrystalline materials has not yet been realized, largely due to the difficulty in maintaining a fine grain size during the densification of nanocrystalline powders. In this preliminary study, it is demonstrated that it may be possible to retain a nanocrystalline grain size in a 3 mol% yttria stabilized zirconia by sinterforging, which enhances densification without significantly affecting grain growth. In addition, other published data are examined to identify conditions favorable for enhancing densification and limiting grain growth.

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