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Refractory Compositions Designed for Highly Heat-Resistant Ceramic Molds in Foundry Practice

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Refractories and Industrial Ceramics Aims and scope

Sintering peculiarities of ceramics prepared by semidry pressing were investigated. The fillers were Y2O3 and fused corundum α-Al2O3 . The binders were pure or Y- or Mg-modified alumoxane. The mechanism of sintering processes in the studied ceramic at various temperatures and its influence on the properties of the resulting ceramic were analyzed. The phase composition and thermomechanical properties of test ceramics prepared at 1500°C were studied. Prepared test ceramic crucibles had improved heat resistance and were robust to thermal cycling. The possibility of using the developed ceramic crucibles for melting and casting of chemically active and highly heat-resistant metals and alloys was discussed.

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Acknowledgments

The work was financially supported by the RFBR under Science Project No. 17-03-00331A.

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Authors and Affiliations

  1. Moscow Aviation Institute (National Research University), Moscow, Russia

    M. S. Varfolomeev

  2. State Scientific Center of Elemento-Organic Compounds Chemistry and Technology (GNIIKhTEOS), Moscow, Russia

    G. I. Shcherbakova

Authors
  1. M. S. Varfolomeev
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  2. G. I. Shcherbakova
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Correspondence to M. S. Varfolomeev.

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Translated from Novye Ogneupory, No. 6, pp. 18 – 23, June, 2018.

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Varfolomeev, M.S., Shcherbakova, G.I. Refractory Compositions Designed for Highly Heat-Resistant Ceramic Molds in Foundry Practice. Refract Ind Ceram 59, 290–295 (2018). https://doi.org/10.1007/s11148-018-0223-3

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