Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1499540 | Scripta Materialia | 2012 | 4 Pages |
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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Authors
Archana Loganathan, Ashutosh S. Gandhi,