NDLI: Stress-Rupture Strength of Polycrystalline Oxide Ceramic up to 1600°C

Content Provider	Springer Nature Link
Author	Bakuv, V. S. Lukin, E. S. Sysoev, É. P.
Copyright Year	2015
Abstract	Experimental data are given for stress-rupture strength (time and deformation to failure) determination for densely-sintered oxide ceramic with four-point bending in the range 1400 – 1550°C (somewhat above the brittle-ductile transition temperature) and with loads up to 60 MPa (close to the ultimate strength). It is shown that elementary mechanical deformation over the whole range of specimen ductile behavior is diffusion-viscous flow with different forms, i.e., dislocation and crystal boundary diffusion movement. Data obtained agree with the suggestion that for transition from ceramic brittle to ductile failure occurrence of some critical vacancy concentration within it is necessary. Independent of ceramic crystal size and test conditions the secondary creep rate and time to failure are constant, and deformation to failure is also constant.
Starting Page	375
Ending Page	382
Page Count	8
File Format	PDF
ISSN	10834877
Journal	Refractories and Industrial Ceramics
Volume Number	56
Issue Number	4
e-ISSN	15739139
Language	English
Publisher	Springer US
Publisher Date	2015-12-08
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	densely-sintered ceramic periclase aluminium-magnesium spinel corundum stress-rupture strength creep time to failure deformation before failure Characterization and Evaluation of Materials Materials Science Ceramics, Glass, Composites, Natural Methods
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry

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