Kounga Njiwa, A.B.A.B.Kounga NjiwaAulbach, E.E.AulbachRödel, J.J.RödelNeubrand, A.A.Neubrand2022-03-032022-03-032006https://publica.fraunhofer.de/handle/publica/21032410.1111/j.1551-2916.2006.01088.xYoungs modulus and fracture toughness of dry-pressed powder compacts of nanocrystalline alumina powders have been determined for different relative densities and average grain size. The powder with a grain size of 40 nm yielded a maximum Youngs modulus of 15 GPa and a peak fracture toughness of 0.12 MPa .m1/2. These high values are rationalized using a model based on contact flattening between particle spheres, which allows a discussion of the influence of grain size and particle packing on the mechanical properties of green bodies.enBruchzähigkeitE-ModulAluminiumoxidNanopartikelGrünkörper531620666journal article