Title: Effect of TiX(X=C,N,O) Assitives on Microstructure and Properties of Silicon Nitride Based ceramics
Authors: DUAN Ren-GuanROEBBEN GERTVLEUGELS JozefVAN DER BIEST Omer
Citation: SCRIPTA MATERIALIA vol. 53 p. 669-673
Publisher: ELSEVIER
Publication Year: 2005
JRC N°: JRC31100
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC31100
Type: Articles in Journals
Abstract: The influence of the addition of 4 wt % TiC, TiN or TiO2 to a Si3N4 matrix with 6 wt % Y2O3 sintering additive on elastic and damping behaviour at elevated temperatures was investigated with the impulse excitation technique. The results revealed that the small amount of inter-granular glass pockets is hardly influenced by the addition of the Ti-based additives. The internal friction curves above 1 300 °C reveal that the addition of TiN or TiO2 results in a lower viscosity of the amorphous phase promoting the alpha- to beta-Si3N4 conversion during solution-reprecipitation when compared to the TiC-added or pristine matrix material.
JRC Institute:Institute for Reference Materials and Measurements

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