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Impression Creep in TBC and Advanced Ceramics Materials
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Impression Creep in TBC and Advanced Ceramics Materials

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Abstract:

The indentation creep of free-standing Y-ZrO2 layer and 20Sc-60Si-20Mg-80O-20N oxynitride glass has been investigated. Creep experiment has been performed with flat cylindrical indenter (hot pressed SiC) in the temperature range from 860 °C to 1300 °C at the loads from 20 to 100 MPa. The strain-time relationship was registered and the creep exponent and activation energy of creep have been calculated. The microstructure changes have been observed and documented. Viscosity as a function of temperature and the glass transition temperature (Tg) were determined in oxynitride glass and compared with values from compressive creep.

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Periodical:

Key Engineering Materials (Volume 333)

Pages:

281-284

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.333.281

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Online since:

March 2007

Authors:

Františka Dorčáková, Vít Jan, Lucia Hegedűsová, Ján Dusza

Keywords:

Activation Energy, Indentation Creep, TBC Topcoat, Y-ZrO2 layer

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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