0105664 - UJF-V 20043237 RIV NL eng J - Journal Article
Ryukhtin, V. - Šaroun, Jan - Harjo, S. - Motohashi, Y. - Wiedenmann, A. - Strunz, Pavel
SANS investigations of pore anisotropy in superplastically deformed ceramics.
[Výzkum anizotropie pórů v superplasticky deformovaných keramikách pomocí SANS.]
Physica B-Condensed Matter. Roč. 350, - (2004), e1019-e1020. ISSN 0921-4526. E-ISSN 1873-2135
R&D Projects: GA ČR GA202/03/0891; GA AV ČR KSK1010104
Keywords : superplastivally deformed * SANS investigations
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.679, year: 2004

Superplastically deformed samples of 3 mol% yttria stabilized tetragonal zirconia polycrystals (3Y-TZP) and 3Y-TZP with 20wt% of Al2O3 were studied by SANS with the aim to compare cavitation behaviours under different deformation conditions. Though the average size of cavities formed during deformation is so large that they can be measured only by high-resolution SANS techniques, conventional SANS method permitted us to measure their specific surface and aspect ratio quite effectively. Analysis of the 2-dimentional SANS data clearly showed two qualitatively different cavitation regimes corresponding to the low stress (low strain-rate and high temperature) and high stress conditions, respectively. In the latter case, a new type of flat pores transversal to the tension axis was observed, in addition to the usually present slightly prolate cavities.

Supreplasticky deformované vzorky tetragonálního polykrystalického zirkonia stabilizovaného 3 mol% yttria (3y-TZP) a 3Y TZP s 20 wt% Al203 byly studovány maloúhlovým stylem neutronů s cílem porovnat gravitační chování při různých deformačních podmínkách.
Permanent Link: http://hdl.handle.net/11104/0012892