Indentation Contact Deformation of 3Y-TZP at Elevated Temperatures

Abstract:

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The contact deformation mechanisms of a superplastic ceramic, 3Y-TZP (3mol % yttria-partially stabilized tetragonal zirconia polycrystals) are examined in indentation creep tests at high temperatures. A large discrepancy between the uniaxial compression and the pyramidal indentation contact behaviors is observed. The indentation creep curves exhibit a hardening behavior, i.e., the penetration rate decreases as the penetration depth and/or the creep time increases. This fact implied that the cooperative grain-boundary sliding (CGBS) in a microscopically localized region, such as the sub-surface contact region beneath a pyramidal indenter, is very limited through the microscopic processes of localized grain interlocking.

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

469-472

DOI:

10.4028/www.scientific.net/KEM.317-318.469

Citation:

H. Muto et al., "Indentation Contact Deformation of 3Y-TZP at Elevated Temperatures", Key Engineering Materials, Vols. 317-318, pp. 469-472, 2006

Online since:

August 2006

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Price:

$35.00

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