Article ID Journal Published Year Pages File Type
1499540 Scripta Materialia 2012 4 Pages PDF
Abstract

Dense t′ ZrO2–8 mol.% YbO1.5 candidate thermal barrier material was aged for 192 h at 1150 and 1250 °C. The high initial indentation toughness (∼87 J m−2) reduced by ∼56% in early-stage aging at both temperatures. The toughness increased gradually with aging at 1150 °C and more rapidly at 1250 °C. Precipitation of the cubic phase and its transformation to t″ during cooling was observed. Transformation toughening was activated by 192 h at 1250 °C. Ferroelastic toughening was dominant in the absence of transformation toughening.

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Physical Sciences and Engineering Materials Science Ceramics and Composites
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