Microstructure and Bending Strength in the Ternary (Mg,Ca)‐Partially‐Stabilized Zirconia
作者:
Rachman Chaim,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 3
页码: 694-699
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb07860.x
出版商: Blackwell Publishing Ltd
关键词: partially stabilized;zirconia;calcium;magnesium;strength;bending
数据来源: WILEY
摘要:
Microstructure and bending strength of commercial (MgO,CaO)‐partially‐stabilized zirconia subjected to heat treatments in the temperature range 900° to 1550°C were characterized. The as‐received optimally aged material contained small ellipsoid‐shaped tetragonal (t) precipitates dispersed homogeneously in the cubic (c) grains. Annealing at lower temperatures caused isothermal martensitic transformation to the monoclinic (m) phase. Annealing at higher temperatures caused formation of chevronlike and irregularshaped cluster precipitates, due to stress‐induced coarsening and precipitate impingement. The loss of bending strength was related to the stored strain energy contributed by each type of precipitate morphology, in addition to decrease in the volume fraction o
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