Stable and Metastable Phase Relationships in the System ZrO2–ErO1.5

Masatomo Yashima, Nobuo Ishizawa, Tatsuo Noma, Masahiro Yoshimura

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Stable and metastable phase relationships in the system ZrO2–ErO1.5 were investigated using homogeneous samples prepared by rapid quenching of melts and by arc melting. The rapidly quenched samples were annealed in air for 48 h at 1690°C or for 8 months at 1315°C. Two tetragonal phases (t‐ and t′‐phases) were observed after quenching samples heated at 1690°C to a room temperature, whereas one t‐phase and cubic (c‐) phase were found in those treated at 1315°C. Since the t′‐phase is obtained through a diffusionless transformation during cooling from a high‐temperature c‐phase, t‐ and c‐phases can coexist at high temperature. The t‐ and c‐phases field spans from 4 to 10 mol% ErO1.5 at 1690°C and from 3 to 15 mol% ErO1.5 at 1315°C. The equilibrium temperature Tt‐m0 between the t‐ and monoclinic (m‐) phases estimated from As and Ms temperatures decreased with increasing ErO1.5 contents.

Original languageEnglish
Pages (from-to)510-513
Number of pages4
JournalJournal of the American Ceramic Society
Issue number3
Publication statusPublished - 1991 Mar

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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