Creep-rupture characteristics of polycrystalline oxide ceramic to 1600 degree C

Creep in polycrystalline oxide ceramics at temperatures 1400 - 1600 degree C occurs by diffusion. The creep curves are very sensitive to the presence of nonequilibrium defects and stress concentrators which were "annealed" during cooling after high-temperature kilning of the materials. App...

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Bibliographic Details
Published in:Glass and ceramics 2012-03, Vol.68 (11-12), p.357-362
Main Authors: Bakunov, V S, Lukin, E S, Sysoev, E P
Format: Article
Language:English
Subjects:
Annealing furnaces
Boundaries
Ceramics
Cooling curves
Creep (materials)
Crystal defects
Crystals
Oxides
Online Access:Get full text
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Summary:Creep in polycrystalline oxide ceramics at temperatures 1400 - 1600 degree C occurs by diffusion. The creep curves are very sensitive to the presence of nonequilibrium defects and stress concentrators which were "annealed" during cooling after high-temperature kilning of the materials. Apparently, rupture is due to vacancies forming in stretch-zone sections tied to crystal boundaries followed by their coagulation on the boundaries. Cracks form and develop differently in different materials, depending on the crystal-chemical properties of the materials.
ISSN:0361-7610
1573-8515
DOI:10.1007/s10717-012-9389-1