Phase Relations and Ordering in the Systems MgO‐Y2O3‐ZrO2 and CaO‐MgO‐ZrO2

JOHN R. HELLMANN; VLADIMIR S. STUBICAN

doi:10.1111/j.1151-2916.1983.tb15711.x

Phase Relations and Ordering in the Systems MgO‐Y₂O₃‐ZrO₂ and CaO‐MgO‐ZrO₂

JOHN R. HELLMANN
, VLADIMIR S. STUBICAN

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The phase relations in the systems MgO‐Y₂O₃‐ZrO₂ and CaO‐MgO‐ZrO₂ were established at 1220° and 1420°C. The system MgO‐Y₂O₃‐ZrO₂ possesses a much‐larger cubic ZrO₂ solid solution phase field than the system CaO‐MgO‐ZrO₂ at both temperatures. The ordered δ phase (Zr₃Y₄O₁₂) was found to be stable in the system ZrO₂‐Y₂O₃ at 1220°C. Two ordered phases φ₁ (CaZr₄O₉) and φ₂ (Ca₆Zr₁₉O₄₄) were stable at 1220°C in the system ZrO₂‐CaO. At 1420°C no ordered phase appears in either system, in agreement with the previously determined temperature limits of the stability for the δ, φ₁, and φ₂ phases. The existence of the compound Mg₃Y_zO₆ could not be confirmed.

Original language	English (US)
Pages (from-to)	265-267
Number of pages	3
Journal	Journal of the American Ceramic Society
Volume	66
Issue number	4
DOIs	https://doi.org/10.1111/j.1151-2916.1983.tb15711.x
State	Published - Apr 1983

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1983.tb15711.x

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title = "Phase Relations and Ordering in the Systems MgO‐Y2O3‐ZrO2 and CaO‐MgO‐ZrO2",

abstract = "The phase relations in the systems MgO‐Y2O3‐ZrO2 and CaO‐MgO‐ZrO2 were established at 1220° and 1420°C. The system MgO‐Y2O3‐ZrO2 possesses a much‐larger cubic ZrO2 solid solution phase field than the system CaO‐MgO‐ZrO2 at both temperatures. The ordered δ phase (Zr3Y4O12) was found to be stable in the system ZrO2‐Y2O3 at 1220°C. Two ordered phases φ1 (CaZr4O9) and φ2 (Ca6Zr19O44) were stable at 1220°C in the system ZrO2‐CaO. At 1420°C no ordered phase appears in either system, in agreement with the previously determined temperature limits of the stability for the δ, φ1, and φ2 phases. The existence of the compound Mg3YzO6 could not be confirmed.",

author = "HELLMANN, \{JOHN R.\} and STUBICAN, \{VLADIMIR S.\}",

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AU - HELLMANN, JOHN R.

AU - STUBICAN, VLADIMIR S.

PY - 1983/4

Y1 - 1983/4

N2 - The phase relations in the systems MgO‐Y2O3‐ZrO2 and CaO‐MgO‐ZrO2 were established at 1220° and 1420°C. The system MgO‐Y2O3‐ZrO2 possesses a much‐larger cubic ZrO2 solid solution phase field than the system CaO‐MgO‐ZrO2 at both temperatures. The ordered δ phase (Zr3Y4O12) was found to be stable in the system ZrO2‐Y2O3 at 1220°C. Two ordered phases φ1 (CaZr4O9) and φ2 (Ca6Zr19O44) were stable at 1220°C in the system ZrO2‐CaO. At 1420°C no ordered phase appears in either system, in agreement with the previously determined temperature limits of the stability for the δ, φ1, and φ2 phases. The existence of the compound Mg3YzO6 could not be confirmed.

AB - The phase relations in the systems MgO‐Y2O3‐ZrO2 and CaO‐MgO‐ZrO2 were established at 1220° and 1420°C. The system MgO‐Y2O3‐ZrO2 possesses a much‐larger cubic ZrO2 solid solution phase field than the system CaO‐MgO‐ZrO2 at both temperatures. The ordered δ phase (Zr3Y4O12) was found to be stable in the system ZrO2‐Y2O3 at 1220°C. Two ordered phases φ1 (CaZr4O9) and φ2 (Ca6Zr19O44) were stable at 1220°C in the system ZrO2‐CaO. At 1420°C no ordered phase appears in either system, in agreement with the previously determined temperature limits of the stability for the δ, φ1, and φ2 phases. The existence of the compound Mg3YzO6 could not be confirmed.

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U2 - 10.1111/j.1151-2916.1983.tb15711.x

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Phase Relations and Ordering in the Systems MgO‐Y₂O₃‐ZrO₂ and CaO‐MgO‐ZrO₂

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