Stress-strain behavior of alumina, magnesia-partially-stabilized zirconia, and duplex ceramics and its relevance for flaw resistance, K[sup r] curve behavior, and thermal shock behavior

Journal Article · Sun Nov 01 00:00:00 EST 1992 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1992.tb04386.x· OSTI ID:7140120

Lutz, E H ^[1]; Swain, M V ^[2]

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1. LWK-Plasmakeramik Gmbh, W-5270 Gummersbach 31 (Germany)
2. Sydney Univ., NSW (Australia). Dept. of Mechanical Engineering

In this paper the stress-strain behavior for Al[sub 2]O[sub 3] of different grain size, for three different Mg-PSZ grades, and for various differently composed duplex structures is investigated and compared with their flaw resistance, K[sup R]-curve behavior, and thermal shock behavior measured in previous works. The experimental results seem to reveal that, for most materials, quasi ductility increases with increasing flaw resistance, increasingly pronounced K[sup R]-curve behavior, and increasing thermal shock retained strength. However, brittle ceramics can exhibit rising K[sup R]-curves, whereas pronounced quasi-ductile materials can exhibit flat K[sup R]-curves.

• OSTI ID: 7140120
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 75:11; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
PHASE TRANSFORMATIONS
THERMAL SHOCK
MAGNESIUM OXIDES
ZIRCONIUM OXIDES
BRITTLENESS
CRACK PROPAGATION
DUCTILITY
GRAIN SIZE
MICROSTRUCTURE
RESIDUAL STRESSES
STRAIN HARDENING
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL STRUCTURE
HARDENING
MAGNESIUM COMPOUNDS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
SIZE
STRESSES
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies