Abstract:This paper investigates the effect of prolonged high temperature exposure on concentric laminated Al 2 O 3 -ZrO 2 composites. An ultrafine scale microstructure with a cellular 7 layer concentric lamination with unidirectional alignment was fabricated by a multi-pass extrusion method. Each laminate in the microstructure was 2-3 µm thick. An alternate lamina was composed of 75%Al 2 O 3 -(25%m-ZrO 2 ) and t-ZrO 2 ceramics. The composite was sintered at 1500 o C and subjected to 1450 o C temperature for 24 hours t… Show more
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