Paper Title:
Microstructure, Fracture and Damage Mechanisms in Rare-Earth Doped Silicon Nitride Ceramics
  Abstract

Influence of rare-earth oxide additives on the strength, fracture toughness and tribological behaviour of hot-pressed Si3N4 and Si3N4/SiC micro/nano-composites has been investigated. Four-point bending mode and ball on disc methods have been used for strength and wear tests and Single-Edge V-Notched Beam, Chevron Notched Beam, Indentation Strength and Indentation Fracture techniques for fracture toughness measurement. Fractography has been used to characterize strength limiting defects, fracture micromechanisms and damage mechanisms during the wear test. The strength values were strongly influenced by the present processing flaws. Wear behavior is significantly influenced by the chemical composition and by the microstructure of the materials.

  Info
Periodical
Edited by
Pavel Šandera
Pages
93-96
DOI
10.4028/www.scientific.net/KEM.465.93
Citation
P. Tatarko, Z. Chlup, J. Dusza, "Microstructure, Fracture and Damage Mechanisms in Rare-Earth Doped Silicon Nitride Ceramics", Key Engineering Materials, Vol. 465, pp. 93-96, 2011
Online since
January 2011
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$32.00
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