四方晶系
粒度
材料科学
相(物质)
增韧
晶粒生长
晶界
矿物学
结晶学
微观结构
复合材料
化学
韧性
有机化学
标识
DOI:10.1111/j.1151-2916.1986.tb07416.x
摘要
The average grain size of ZrO 2 (+Y, o,) materials sintered at 1400°C was observed to depend significantly on the Y 2 O 3 content. The average grain size decreased by a factor of 4 to 5 for Y 2 O 3 contents between 0.8 and 1.4 mol% and increased at Y 2 O 3 contents of 6.6 mol%. Grain growth control by a second phase is the concept used to interpret these data; compositions with a small grain size lie within the two‐phase tetragonal + cubic phase field, and the size of the tetragonal grains is believed to be controlled by the cubic grains. This interpretation suggests that the Y 2 O 3 ‐rich boundary of the two‐phase field lies between 0.8 and 1.4 mol% Y 2 O 3 . Transformation toughened materials fabricated in this binary system must have a composition that lies within the two‐phase field to obtain the small grain size required, in part, to retain the tetragonal toughening agent.
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