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|Title:||Effect of TiX(X=C,N,O) Assitives on Microstructure and Properties of Silicon Nitride Based ceramics|
|Authors:||DUAN Ren-Guan; ROEBBEN GERT; VLEUGELS Jozef; VAN DER BIEST Omer|
|Citation:||SCRIPTA MATERIALIA vol. 53 p. 669-673|
|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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