Skip to main content
Log in

The Al2O3–HfO2–Gd2O3 phase diagram. II. Vertical sections

  • Physicochemical Materials Research
  • Published:
Powder Metallurgy and Metal Ceramics Aims and scope

For more complete description of the Al2O3–HfO2–Gd2O3 phase diagram, three vertical sections are constructed in a wide temperature and composition range. The Gd2O3 and HfO2 corner bisectors explain the mechanisms of Gd2O3 phase transformations, C ⇆ X ⇆ H ⇆ A ⇆ B, and interactions in the HfO2 corner of the system. The isopleth at 15 mol.% HfO2 (15H) shows the Al2O3–HfO2–Gd2O3 constitution in Al2O3- and Gd2O3-rich regions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

  1. S. M. Lakiza, Ya. S. Tishchenko, and L. M. Lopato, “Projections of the liquidus and solidus surfaces of the Al2O3–HfO2–Gd2O3 phase diagram,” Powder Metall. Met. Ceram., 50, No. 7–8, 429–441 (2011).

    Article  CAS  Google Scholar 

  2. S. M. Lakiza, Ya. S. Tishchenko, V. P. Red’ko, and L. M. Lopato, “The Al2O3–HfO2–Gd2O3 phase diagram I. Isothermal sections at 1250 and 1650°C,” Powder Metall. Met. Ceram., 51, No. 1–2, 87–92 (2012).

    Article  CAS  Google Scholar 

  3. L. M. Lopato, A. V. Shevchenko, and G. I. Gerasimyuk, “The HfO2–Al2O3 system,” Izv. AN SSSR. Neorg. Mater., 12, No. 9, 1623–1626 (1976).

    CAS  Google Scholar 

  4. P. Duran, “Phase relationships in the hafnia–gadolinia system,” Ceramurg. Int., 3, No. 4, 137–140 (1977).

    Article  CAS  Google Scholar 

  5. A. V. Shevchenko, L. M. Lopato, and L. V. Nazarenko, “Systems of HfO2 with samarium, gadolinium, terbium, and dysprosium oxides at high temperatures,” Izv. AN SSSR. Neorg. Mater., 20, No. 11, 1862–1866 (1984).

    CAS  Google Scholar 

  6. P. P. Budnikov, V. I. Kushakovskii, and V. S. Belevantsev, “Study of the Gd2O3–Al2O3 and Sm2O3–Al2O3 systems,” Dokl. AN SSSR, 165, No. 5, 1075–1077 (1965).

    CAS  Google Scholar 

  7. M. Mizuno, T. Yamada, and T. Noguchi, “Phase diagrams of the systems Al2O3–Eu2O3 and Al2O3–Gd2O3 at high temperatures,” J. Ceram. Soc. Jap., 85, No. 11, 543–549 (1977).

    CAS  Google Scholar 

  8. M. Gervais and A. Douy, “Solid phase transformation and melting of the compounds Ln4Al2O9 (Ln = Gd, Dy, Y),” Mater. Sci. Eng., B38, No. 1–2, 118 (1996).

    Article  CAS  Google Scholar 

  9. J. Coutures and J. P. Coutures, “Etude par rayons X a haute temperature des transformations polymorphiques des perovskites LnAlO3 (Ln = element lanthanidique),” J. Solid State Chem., 52, No. 2, 95–100 (1984).

    Article  CAS  Google Scholar 

  10. T. Shishido, K. Okamura, and S. Yajima, “Gd3Al5O12 phase obtained by crystallization of amorphous Gd2O3 × 5/3Al2O3,” J. Am. Ceram. Soc., 61, No. 7–8, 373–375 (1978).

    Article  CAS  Google Scholar 

  11. N. N. Matyushenko, É. P. Shevyakova, E. V. Lifshitz, et al., “Crystal structure and some properties of gadolinium aluminate Gd3Al5O12,” Zh. Neorg. Chim., 30, No. 7, 1654–1657 (1985).

    CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to S. M. Lakiza.

Additional information

L. M. Lopato (Deceased).

Translated from Poroshkovaya Metallurgiya, Vol. 51, No. 5–6 (485), pp. 84–92, 2012.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Tishchenko, Y.S., Lakiza, S.M. & Lopato, L.M. The Al2O3–HfO2–Gd2O3 phase diagram. II. Vertical sections. Powder Metall Met Ceram 51, 316–322 (2012). https://doi.org/10.1007/s11106-012-9434-1

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11106-012-9434-1

Keywords

Navigation