Strength and Flawelimination Assessmentin Tape Cast Ceramic Laminates

Monolithic Al2O3 ceramic laminates were fabricated via a tape casting process. The strength of single tapes were compared with laminates using biaxial flexure tests. The average fracture stress was unchanged. However, the laminates presented a multi‐modal strength distribution. The feasibility of eliminating or diminishing void‐type flaws present in the green tapes was 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 by four‐point bending tests. me thermocompression of green tapes during laminate fabrication was found to drastically reduce the severity of flaws.