Influence of ceramic-metal interface adhesion on crack growth resistance of ZrO2-Nb ceramic matrix composites
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2008
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Elsevier
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J.F. Bartolomé, J.I. Beltrán, C.F. Gutiérrez-González, C. Pecharromán, M.C. Muñoz, J.S. Moya, Influence of ceramic–metal interface adhesion on crack growth resistance of ZrO2–Nb ceramic matrix composites, Acta Materialia, Volume 56, Issue 14, 2008, Pages 3358-3366, ISSN 1359-6454, https://doi.org/10.1016/j.actamat.2008.03.021.
Abstract
Yttria-stabilized zirconia strengthened with lamellar flaky-shape Nb metal particles was obtained by hot-pressing at 1500 °C for 1 h. The ZrO2–Nb interface has been studied by atomistic, first-principles calculations and by high-resolution transmission electron microscopy. The influence of the ceramic–metal interface on the crack growth resistance has been investigated. Crack growth is shown to occur with a rising resistance, governed by intact metal ligaments in the crack wake. Crack extension occurs by a combination of plastic deformation on the metal particles and interface debonding. The connection between the interface adhesion and this microstructural toughening mechanism has been evaluated.