On the oxidation behaviour of monolithic TiB2 and Al2O3-TiB2 and Si3N4-TiB2 composites

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 1992 English Publisher:Springer Science and Business Media LLCJournal:Journal of Thermal Analysis, volume 38, pages 2,657-2,668 (issn: 0368-4466, eissn: 1572-8943,

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Authors: A. Tampieri; E. Landi; A. Bellosi;

doi: 10.1007/bf01979742

On the oxidation behaviour of monolithic TiB2 and Al2O3-TiB2 and Si3N4-TiB2 composites

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Abstract

In view of the susceptibility of TiB2 to oxidation, the thermal stability of monolithic TiB2 and of Al2O3-30 vol% TiB2 and Si3N4-20 vol% TiB2 composites was investigated. The temperature at which TiB2 ceramic starts to oxidize is about 400°C, oxidation kinetics being controlled by diffusion up toT≈900°C and in the first stage of the oxidation at 1000°C and 1100°C (up to 800 min and 500 min respectively), and by a linear law at higher temperatures and for longer periods.

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