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Microstructure and properties of silicon nitride ceramics with calcium aluminate additions

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Abstract

Silicon nitride ceramics containing calcium aluminates as sintering aids have been prepared by hot pressing at 1650°C in a nitrogen atmosphere, and the effect of sintering aid content on their microstructure, phase composition, mechanical strength, and air oxidation resistance has been studied. The results demonstrate that the Si3N4 ceramic containing 10 wt % calcium aluminates has a uniform distribution of intergranular multicomponent oxide phases and consists of densely packed silicon nitride grains. Owing to this, it offers the maximum mechanical strength (850 MPa) and is stable to air oxidation up to 1300°C.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia

    Yu. F. Kargin, A. S. Lysenkov, S. N. Ivicheva & K. A. Solntsev

  2. Mendeleev University of Chemical Technology, Miusskaya pl. 9, Moscow, 125047, Russia

    A. I. Zakharov & N. A. Popova

Authors
  1. Yu. F. Kargin
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  2. A. S. Lysenkov
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  3. S. N. Ivicheva
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  4. A. I. Zakharov
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  5. N. A. Popova
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  6. K. A. Solntsev
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Correspondence to Yu. F. Kargin.

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Original Russian Text © Yu.F. Kargin, A.S. Lysenkov, S.N. Ivicheva, A.I. Zakharov, N.A. Popova, K.A. Solntsev, 2010, published in Neorganicheskie Materialy, 2010, Vol. 46, No. 7, pp. 892–896.

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Kargin, Y.F., Lysenkov, A.S., Ivicheva, S.N. et al. Microstructure and properties of silicon nitride ceramics with calcium aluminate additions. Inorg Mater 46, 799–803 (2010). https://doi.org/10.1134/S0020168510070204

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  • DOI: https://doi.org/10.1134/S0020168510070204

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