Journal of Materials Science

, Volume 28, Issue 4, pp 909–916 | Cite as

Creep behaviour of Si3N4/Y2O3/Al2O3/AIN alloys

  • J. Crampon
  • R. Duclos
  • N. Rakotoharisoa


The compression creep behaviour of pressureless sintered Y2O3/Al2O3/AIN-doped Si3N4 was studied between 1473 and 1673 K, under stresses ranging from 100–300 MPa. Strain rate versus stress and temperature analysis give a stress exponent n≃1 and an activation energy Q=860 kJ mol−1. Microstructural change was investigated by transmission electron microscopy. The observed strain whorls, the stress exponent and the activation energy are indicative of a solution-diffusion-precipitation accommodated grain-boundary sliding where the diffusion through the glass is rate controlling.


Polymer Microscopy Electron Microscopy Transmission Electron Microscopy Activation Energy 
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Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • J. Crampon
    • 1
  • R. Duclos
    • 1
  • N. Rakotoharisoa
    • 1
  1. 1.Laboratoire de Structure et Propriétés de l'état SolideURA CNRS 234, Bât C6, Université des Sciences et Technologies de LilleVilleneuve d'Ascq CedexFrance

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