Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-663-C8-666
Mechanical Spectroscopy of a YSiAlON GlassL. Donzel and R. Schaller
Ecole Polytechnique Fédérale de Lausanne, Département de Physique, Institut de Génie Atomique, 1015 Lausanne, Switzerland
A YSiAlON glass has been studied by mechanical spectroscopy, through the glass transition. The α-relaxation peak observed in the YSiAlON glass can be interpreted well by a formalism of hierarchically correlated molecular mobility through the glass transition. In particular this formalism accounts for the observation of unusually high apparent activation energy. The viscoelastic properties of the glass are compared to the mechanical behavior of a silicon nitride ceramic.
© EDP Sciences 1996