Guglielmi, Paula O.Paula O.GuglielmiBlaese, DiegoDiegoBlaeseHablitzel, Murilo P.Murilo P.HablitzelNunes, Gabriel F.Gabriel F.NunesLauth, Victor R.Victor R.LauthHotza, DachamirDachamirHotzaAl-Qureshi, Hazim AliHazim AliAl-QureshiJanßen, RolfRolfJanßen2020-10-222020-10-222015-02-27Ceramics International 6 (41): 7836-7846 (2015)http://hdl.handle.net/11420/7647All-oxide ceramic matrix composites produced by a novel route based on the lamination of thermoplastic prepregs are investigated. This route allows for the production of composites with very homogeneous microstructures and a reduced amount of matrix cracks. NextelTM 610 alumina woven fabric is used here to reinforce a porous oxide matrix composed of 80 vol% Al2O3 and 20 vol% ZrO2. The mechanical behavior of composites submitted to different heat treatments is investigated under 4-point bending and short beam shear. Results show that composites with low interlaminar shear strength present a graceful failure under 4-point bending, characterized by a stepwise stress reduction upon straining beyond the peak stress. The fracture of such composites is accompanied by a series of interfacial delamination events, which enhance energy dissipation during failure. An increase of the interlaminar shear strength due to matrix densification causes a loss of the stepped stress-strain behavior. Nevertheless, fiber-related toughening mechanisms such as crack deflection and bridging still ensure inelastic deformation up to failure of these composites.en0272-88422015678367846Elsevier Sciencealuminaceramic matrix compositeslaminationthermoplastic prepregszirconiaTechnikJournal Article10.1016/j.ceramint.2015.02.120Other