ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The contact deformation mechanisms of a superplastic ceramic, 3Y-TZP (3mol %yttria-partially stabilized tetragonal zirconia polycrystals) are examined in indentation creep tests athigh temperatures. A large discrepancy between the uniaxial compression and the pyramidalindentation 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 factimplied 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 themicroscopic processes of localized grain interlocking
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.317-318.469.pdf
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