Paper Title:
Silicon Carbide Whiskers Interference on Silicon Nitride Based Composite
  Abstract

Silicon nitride based composite has been prepared, using a direct mixture process as alternative route. Silicon carbide whiskers were mixed directly to silicon nitride based powders containing yttrium and neodymium oxide as sintering aids. Uniaxial hot pressing was used to prepare sintered samples. Crystalline phases were identified using x-ray diffractometry. Intergranular phases were analyzed using Scanning Electron Microscopy. Some mechanical properties (microhardness and fracture toughness) were also evaluated. The obtained high values of fracture toughness were correlated to the activation of toughening mechanisms, such as crack bridging and crack deflection.

  Info
Periodical
Materials Science Forum (Volumes 591-593)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
543-547
DOI
10.4028/www.scientific.net/MSF.591-593.543
Citation
S. A. Baldacim, C. dos Santos, O. M. M. Silva, C. R. M. Silva, "Silicon Carbide Whiskers Interference on Silicon Nitride Based Composite", Materials Science Forum, Vols. 591-593, pp. 543-547, 2008
Online since
August 2008
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$32.00
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