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Hot pressing of Y2O3 doped Si3N4 ceramics

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Bučevac, Dušan
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Abstract
The effect of seeding on the microstructure and mechanical properties of hot-pressed silicon nitride was investigated by introducing large, elongated beta-Si3N4 particles into an alpha-Si3N4 matrix. Densification and fracture toughness were followed in the presence Of Y2O3 as sintering aid. The concentration of seeds varied from 0 to 5 wt%. The maximum fracture toughness was 8.0 MPam(1/2) for a material with 3 wt% seeds, hot pressed at 1750 degrees C, for 4h.
Keywords:
hot pressing / seeds / silicon nitride
Source:
Materials Science Forum, 2005, 494, 423-427
Note:
  • Current Research in Advanced Materials and Processes, 6th Conference of the Yugoslav-Materials-Research-Society, Sep 13-17, 2004, Herceg Novi, Montenegro

ISSN: 0255-5476 (print)

WoS: 000230985800070

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URI
http://vinar.vin.bg.ac.rs/handle/123456789/6536
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Vinča

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