Becher P.F.Sun E.Y.Hsueh C.H.Plucknett K.P.Kim H.D.Hirao K.Brito M.E.CHUN-HWAY HSUEH2019-09-252019-09-25199910139826https://scholars.lib.ntu.edu.tw/handle/123456789/424996The development of high strength (? 1 GPa), high toughness (? 10 MPa¡Ôm) ceramic systems is being examined using two approaches. In silicon nitride, toughening is achieved by the introduction of large prismatic shaped grains dispersed in a fine grain matrix. For the system examined herein, both the microstructure and the composition must be controlled. A distinctly bimodal distribution of grain diameters combined with controlled yttria to alumina ratio in additives to promote interfacial debonding is required. Using a cermet approach, ductile Ni3Al-bonded TiC exhibited toughening due to plastic deformation within the Ni3Al binder phase assisted by interfacial debonding and cleavage of TiC grains. The TiC-Ni3Al cermets have toughness values equal to those of the WC-Co cermets. Furthermore, the TiC-Ni3Al cermets exhibit high strengths that are retained in air to temperatures of ? 1000¢XC.CarbideNickel Aluminide-BondedSelf-ReinforcedSilicon NitrideStrengthToughnessjournal article2-s2.0-17944391363https://www2.scopus.com/inward/record.uri?eid=2-s2.0-17944391363&partnerID=40&md5=889ed74fcf2cc483cc85f550cff69e2d