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Pre-Treatment of Si3N4 Filler Particles for the Improvement of Si3N4filler/Si–C–Nmatrix Particulate-Reinforced Composites

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The surface of Si3N4 filler particles was modified by heat treatments before the onset of the precursor impregnation and pyrolysis process. The strength, Young's modulus, and hardness of Si3N4filler/Si–C–Nmatrix particulate-reinforced composites (PRC) were improved up to 50%, 60%, and 71%, respectively, by the treatment. Si was formed at the surface of the Si3N4 filler particles by the treatment, which induced a strong bonding between the filler and the Si–C–N matrix during pyrolysis by a carbothermal reaction, thus improving the properties of the PRC.
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Document Type: Research Article

Affiliations: Max-Planck-Institut für Metallforschung and Institut für Nichtmetallische Anorganische Materialien, Universität Stuttgart, Pulvermetallurgisches Laboratorium, Heisenbergstrasse 3, D-70569 Stuttgart, Germany

Publication date: 2008-06-01

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