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Visco-elasticity in alumina ceramics at room temperature

✍ Scribed by A. T. Yokobori; C. Y. Jian; T. Adachi; T. Yokobori

Publisher
Springer
Year
1993
Tongue
English
Weight
388 KB
Volume
28
Category
Article
ISSN
0022-2461

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✦ Synopsis

The decrease in the fracture strength of alumina ceramics at room temperature has usually been assumed to be caused by the effect of stress corrosion. However, at high temperatures, a viscous deformation will occur due to a glass-like phase which exists in the grain boundary. A study of the relation of the fracture strength of an alumina ceramics smooth specimen at room temperature to the visco-elastic property was performed. Mechanical tests and visco-elastic analysis, has shown that the fracture strength of this kind is controlled by the visco-elasticity.

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