Deformation of Alumina/Titanium Carbide Composite at Elevated Temperatures |
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Authors: | Takayuki Nagano Hidezumi Kato Fumihiro Wakai |
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Affiliation: | Research and Development Center, Suzuki Motor Corporation, Hamamatsu, 432-91, Japan;Ceramic Science Department, Government Industrial Research Institute, Nagoya, Nagoya, 462, Japan |
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Abstract: | The deformation behavior of an Al2O3/30 wt% TIC composite in uniaxial tension was evaluated under vacuum over the temperature range of 1300° to 1550°C. The Al203/TiC composite exhibited the maximum elongation of 66% at an initial strain rate of 1.19 X l0-4 s-1 at 1550°C. The stress exponent calculated from peak stresses of true stress-true strain curves at 1500OC was 3.8, which was in good agreement with that obtained by changing the crosshead speed during the tension test. The apparent activation energy at 20 MPa was 853 kJ/mol. In addition the deformation of the Al2O3/TiC composite in uniaxial tension at elevated temperature was accompanied by cavitation. |
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Keywords: | alumina titanium carbide composites superplastic grain boundaries |
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