Journal of Materials Science

, Volume 30, Issue 3, pp 834–836 | Cite as

Temperature-dependent Young's modulus of an SiCw/Al2O3 composite

  • M. Weller
  • H. Ledbetter


Using a computer-controlled resonant-bar apparatus at frequencies near 5 kHz, we determined the temperature-dependent (86–732 K) Young's modulus of a ceramic-ceramic composite with a 0.30 volume fraction of SiC whiskers in an Al2O3 matrix. Using a megahertz-frequency pulse-echo method, it was verified that the composite shows little anisotropy (variation of the elastic properties with direction). Using a scattered-plane-wave ensemble-average method, we modelled the ambient-temperature elastic constants and found good model-observation agreement. To model the behaviour of the Young's modulus with temperature, Varshni's three-parameter relationship for Einstein-oscillator monocrystals was used. Again, good model-observation agreement was found. The mechanical-loss spectrum showed no remarkable features, indicating good whisker-matrix interface properties up to 732 K.


Polymer Anisotropy Al2O3 Elastic Property Elastic Constant 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • M. Weller
    • 1
  • H. Ledbetter
    • 2
  1. 1.Max-Planck-Institut für Metallforschung, Institut für WerkstoffwissenschaftStuttgartGermany
  2. 2.Materials Science and Engineering LaboratoryNational Institute of Standards and TechnologyBoulderUSA

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