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

JOHN R. HELLMANN, VLADIMIR S. STUBICAN

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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.

Original languageEnglish (US)
Pages (from-to)265-267
Number of pages3
JournalJournal of the American Ceramic Society
Volume66
Issue number4
DOIs
StatePublished - Jan 1 1983

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Solid solutions
Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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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.",
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Phase Relations and Ordering in the Systems MgO‐Y2O3‐ZrO2 and CaO‐MgO‐ZrO2. / HELLMANN, JOHN R.; STUBICAN, VLADIMIR S.

In: Journal of the American Ceramic Society, Vol. 66, No. 4, 01.01.1983, p. 265-267.

Research output: Contribution to journalArticle

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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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