Strength of tape cast and laminated ceramics

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

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08854.x· OSTI ID:82627

Ham-Su, R; Wilkinson, D S ^[1]

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1. McMaster Univ., Hamilton, Ontario (Canada). Dept. of Materials Science and Engineering

Monolithic Al{sub 2}O{sub 3} ceramic laminates were fabricated via a tape casting process. The strength of the single tapes was compared with that of laminates, using biaxial flexure tests. The fracture stress was similar. However, the laminates presented a lower Weibull modulus. The feasibility of eliminating or diminishing void-type flaws present in the green tapes was also assessed. To this end, tapes were first punctured, then laminated and sintered, and the effect of these known flaws in the final ceramic was assessed in four-point flexure tests. The thermocompression of green tapes during laminate fabrication was found to modify the flaws to a more forgiving morphology.

• Sponsoring Organization: USDOE
• OSTI ID: 82627
• Journal Information: Journal of the American Ceramic Society, Vol. 78, Issue 6; Other Information: PBD: Jun 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CASTING
FLEXURAL STRENGTH
LAYERS
DEFECTS
SINTERING
SCANNING ELECTRON MICROSCOPY
SAMPLE PREPARATION
MORPHOLOGY