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Título

Threshold strength evaluation on an Al2O3–ZrO2 multilayered system

AutorBermejo, Raúl; Torres, Y.; Baudín de la Lastra, Carmen; Sánchez Herencia, Antonio Javier; Pascual, Javier
Palabras claveSlip casting
Composites
Mechanical properties
Toughness
Fecha de publicación2007
EditorElsevier
CitaciónJournal of the European Ceramic Society 27 (2007) 1443–1448
ResumenThe fracture behaviour of an alumina–zirconia multilayered ceramic obtained by slip casting has been evaluated and compared to monolithic alumina taken as a reference. It is found that the laminated system exhibits an apparent fracture toughness Kapt,c, calculated experimentally (SEPB) and analytically with a weight function approach, higher than twice the value determined for the monolithic material. Additionally, the experimental rupture tests accomplished indicate the existence of a threshold strength in the multilayer. The increase in Kapt,c in the laminate, associated with a pronounced R-curve behaviour, is discussed in terms of the high compressive stresses in the internal layers and their effect on the effective driving force for crack extension.
Versión del editordoi:10.1016/j.jeurceramsoc.2006.05.037
URIhttp://hdl.handle.net/10261/17418
DOI10.1016/j.jeurceramsoc.2006.05.037
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