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Projections of the liquidus and solidus surfaces of the Al2O3-HfO2-Gd2O3 phase diagram

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Powder Metallurgy and Metal Ceramics Aims and scope

The phase equilibria during crystallization of alloys in the Al2O3-HfO2-Gd2O3 system are studied for the first time by physicochemical methods. The liquidus and solidus surfaces on the composition triangle as well as the melting diagram and crystallization scheme are constructed. No new ternary compounds or appreciable ternary solid solution regions are found in the system. The maximum temperature in the system is 2820°C and corresponds to the AL + F + GA (E3) three-phase eutectic. Since crystallization in the system finishes with eutectic reactions, it allows materials of the quasiternary system to combine the unique properties of HfO2-based T and F solid solutions and the properties of other phases in composite materials.

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Notes

  1. The concentration is in mol.% here and below in the text.

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Acknowledgements

The authors are grateful to Z. O. Zaitseva and V. P. Red’ko for participation in petrography and x-ray diffraction, respectively.

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Authors and Affiliations

  1. Frantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev, Ukraine

    S. M. Lakiza, Ya. S. Tishchenko & L. M. Lopato

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  1. S. M. Lakiza
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  2. Ya. S. Tishchenko
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  3. L. M. Lopato
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Correspondence to S. M. Lakiza.

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Translated from Poroshkovaya Metallurgiya, Vol. 50, No. 7–8 (480), pp. 60–74, 2011.

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Lakiza, S.M., Tishchenko, Y.S. & Lopato, L.M. Projections of the liquidus and solidus surfaces of the Al2O3-HfO2-Gd2O3 phase diagram. Powder Metall Met Ceram 50, 429–441 (2011). https://doi.org/10.1007/s11106-011-9347-4

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