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Powder Metallurgy and Metal Ceramics

, Volume 51, Issue 9–10, pp 594–601 | Cite as

Isothermal sections of the Al2O3–HfO2–Er2O3 phase diagram at 1250 and 1600°C

  • Ya. S. Tishchenko
  • S. M. Lakiza
  • V. P. Red’ko
  • L. M. Lopato
PHYSICOCHEMICAL MATERIALS RESEARCH
  • 130 Downloads

The isothermal sections at 1250 and 1600°C for the Al2O3–HfO2–Er2O3 phase diagram are constructed for the first time. Phase equilibria are established at these temperatures; they are determined by the most thermodynamically stable compound, HfO2. No ternary compounds or appreciable solid-solution regions based on components or binary compounds are found in the ternary system. The presence of AL + F, Er3A5 + F, ErA + F, and Er2A + F two-phase regions on the isothermal section at 1650°C suggests that they contain triangulating sections of the Al2O3–HfO2–Er2O3 ternary system.

Keywords

ceramics hafnia alumina erbia interaction isothermal section phase diagram eutectic materials 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Ya. S. Tishchenko
    • 1
  • S. M. Lakiza
    • 1
  • V. P. Red’ko
    • 1
  • L. M. Lopato
    • 1
  1. 1.Frantsevich Institute for Problems of Materials ScienceNational Academy of Sciences of UkraineKievUkraine

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