Potential for Diboride Reinforcement of Oxide Matrix Composites

Author:

Vedula K.,Abada A.,Williams W. S.

Abstract

ABSTRACTParticulate 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.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

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