Thermal shock behavior of duplex ceramics

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb07290.x· OSTI ID:5192816

Lutz, E H; Claussen, N ^[1]; Swain, M V ^[2]

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1. Technical Univ. of Hamburg, Hamburg (DE)
2. Univ. of Sydney, Sydney (AU)

The thermal-stress fracture behavior of duplex ceramics is investigated by quenching in water and in oil. Comparison with the matrix materials shows that the critical quenching temperature difference, {Delta}T{sub c}, is not or is only slightly reduced, even for duplex ceramics of significantly reduced strength. In sintered composites, thermal-stress-induced microcracking within pressure zones and crack initiation at pressure zone--matrix interfacial defects develop before {Delta}T{sub c} is reached. These effects are accompanied by a gradual reduction in strength. At {Delta}T{sub c}, critical crack propagation occurs. The retained strength after thermal shock of duplex ceramics is significantly improved compared with the respective matrix materials. This behavior can be related reasonably well with the K{sup R}-curve behavior.

• OSTI ID: 5192816
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 74:1; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
MECHANICAL PROPERTIES
THERMAL SHOCK
COMPOSITE MATERIALS
CRACK PROPAGATION
FRACTURE MECHANICS
SINTERING
FABRICATION
MATERIALS
MECHANICS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties