Effect of high-temperature aging on the fracture toughness of ytterbia-stabilized t? zirconia
| Autor: | Ashutosh S. Gandhi, Archana Loganathan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Toughness
High temperature aging Materials science Spark plasma sintering Thermal barrier coating Fracture toughness Coatings Phase (matter) Indentation Thermal barrier materials General Materials Science Cubic zirconia Indentation toughness Composite material Precipitation (chemistry) Ferroelastic toughening Transformation toughening Mechanical Engineering Metals and Alloys Condensed Matter Physics Cubic phase Mechanics of Materials Phase transitions Zirconia |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| DOI: | 10.1016/j.scriptamat.2012.05.001 |
| Popis: | Dense t? ZrO 2-8 mol.% YbO 1.5 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. � 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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