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Effect of composition on the fracture strength of hot-pressed silicon nitride

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Abstract

The hot-pressing behaviour and fracture of silicon nitride as a function of composition was investigated. Two compositions were studied: 95 wt% Si3 N4 + 5 wt% MgO, Material A, and 88 wt% Si3N4 + 2wt% MgO + 10wt% Y2O3, Material B. The effect of composition, hot-pressing time and temperature on the properties of the product were examined. The room-temperature fracture strengths of the two materials were evaluated using the diametral-compression disc test.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Science, University of Manchester/UMIST, Grosvenor Street, M1 7HS, Manchester, UK

    J. E. O. Ovri & T. J. Davies

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  1. J. E. O. Ovri
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  2. T. J. Davies
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Ovri, J.E.O., Davies, T.J. Effect of composition on the fracture strength of hot-pressed silicon nitride. J Mater Sci 23, 1817–1824 (1988). https://doi.org/10.1007/BF01115726

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  • DOI: https://doi.org/10.1007/BF01115726

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