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Phase diagram of Cu2O-CuO-Y2O3 system in air

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Abstract

The isobaric phase diagram of the Cu2O-CuO-Y2O3 ternary system has been investigated under 0.21 atm oxygen partial pressure mainly by thermogravimetric and differential thermal analyses. The present system was confirmed to consist of four solid phases: Y2O3, Y2Cu2O5, CuO, and Cu2O. The Y2Cu2O5 phase is formed by the peritectic reaction with Y2O3 at 1493 K. An univariant reaction, L ⇆5 Cu2O + Y2Cu2O5, appears at 1368 K. Cu2O is stable at high temperatures and transforms to CuO at 1299 K.

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Authors and Affiliations

  1. Department of Metallurgy, Kyoto University, 606, Sakyo-ku, Kyoto, Japan

    Wei Zhang (Graduate Student) & Kozo Osamura (Professor)

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  1. Wei Zhang
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  2. Kozo Osamura
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Zhang, W., Osamura, K. Phase diagram of Cu2O-CuO-Y2O3 system in air. Metall Trans A 21, 2243–2248 (1990). https://doi.org/10.1007/BF02647886

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  • DOI: https://doi.org/10.1007/BF02647886

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