Experimental study of the fracture toughness of a ceramic/ceramic-matrix composite sandwich structure

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08862.x· OSTI ID:82631

Li, Z; Taya, M ^[1]; Dunn, M L ^[2]; Watanabe, Ryuzo ^[3]

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1. Univ. of Washington, Seattle, WA (United States). Dept. of Mechanical Engineering
2. Univ. of Colorado, Boulder, CO (United States)
3. Tohoku Univ., Sendai (Japan)

A hybrid experimental-numerical approach has been used to measure the fracture resistance of a sandwich structure consisting of a 304 stainless steel/partially stabilized zirconia ceramic-matrix composite crack-arresting layer embedded in a partially stabilized zirconia ceramic specimen. The mode 1 fracture toughness increases significantly when the crack propagates from the ceramic into the ceramic-matrix composite region. The increased toughening due to the stainless steel particles is explained reasonably well by a toughening model based on processing-induced thermal residual stresses. In addition, several experimental modifications were made to the chevron-notch wedge-loaded double cantilever beam specimen to overcome numerous problems encountered in generating a precrack in the small, brittle specimens used in this study.

• Sponsoring Organization: USDOE
• OSTI ID: 82631
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 6 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
CRACK PROPAGATION
FRACTURE MECHANICS
FRACTURE PROPERTIES
INTERFACES
INTERFEROMETRY
NOTCHES
RESIDUAL STRESSES
SAMPLE PREPARATION
STAINLESS STEEL-304
YTTRIUM OXIDES
ZIRCONIUM OXIDES