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Potential for Diboride Reinforcement of Oxide Matrix Composites

Published online by Cambridge University Press:  21 February 2011

K. Vedula ,
A. Abada  and
W. S. Williams
K. Vedula
Affiliation:
Associate Professor, Graduate Student and Professor, respectively. Department of Materials Science and Engineering Case Western Reserve University, Cleveland, Ohio 44106
A. Abada
Affiliation:
Associate Professor, Graduate Student and Professor, respectively. Department of Materials Science and Engineering Case Western Reserve University, Cleveland, Ohio 44106
W. S. Williams
Affiliation:
Associate Professor, Graduate Student and Professor, respectively. Department of Materials Science and Engineering Case Western Reserve University, Cleveland, Ohio 44106
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Abstract

Particulate composites of TiB2 in ZrO2, Y2O3 and Al2O3 have been prepared by vacuum hot pressing. Specimens were tested in oxyacetylene flames at 1650 to 2050°C; in vacuum at 1600°C and by induction heating in air at 1400 to 1600°C in order to evaluate the chemical compatability between the diboride/oxide combinations, as well as the effectiveness of the oxides as diffusion barriers. Results indicate that the large vapor ressure of B2O3 formed at the diboride/oxide interfaces presents serious problems under all the conditions tested.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 125: Symposium N – Materials Stability and Environmental Degradation , 1988 , 61
Copyright
Copyright © Materials Research Society 1988

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References

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