Phase equilibrium and transition of ZrO2 ceramics

ZrO2陶瓷的相平衡与转变

• 批准号: 04453055
• 负责人: SAKUMA Taketo
• 金额: $ 4.1万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04453055/
• 关键词: ZrO2; Transformation; Transition; Microstructure; Structure; phase equilibrium; 微構造; スピノーダル分解

There is two totally different interpretation about the mechanism of the c-t transition of ZrO2 based ceramics. One, which is proposed by Prof.Heuer, is that the transition is resulted from the first order type and the other, which is proposed by the author, is second type. The first interpretation has been popular in the field of ZrO2 ceramics since the author's invited presentation at the international conference of ZrO2 held in Australia on 1992. At this conference the author has cleared up that many experimental results can not be interpretated from the standing point that the transition is the first type and has confirmed that there is no contradictions when that transition is thought to be second order type. Moreover the author has made clear that various experimental results are resulted from the vacancies of oxygen in the fluorite lattice structure. When the oxygen ions move from the idea position in the fluorite structure by the introduction of the oxygen vacancies, there is the possibility that the type of this transition is mistaken for the first type.

关于基于ZRO2的陶瓷的C-T跃迁的机理，有两个完全不同的解释。一个是由Heuer教授提出的，是该过渡是由第一阶类型产生的，另一个是由作者提出的，是第二类。自从作者于1992年在澳大利亚举行的ZRO2国际会议上邀请演讲以来，第一种解释一直很受欢迎。在本次会议上，作者清除了许多实验结果，从直通的地位无法解释过过渡是第一种类型的，并且确认没有何时进行过渡的偶然性。此外，作者已经明确指出，氟晶格结构中的氧气空缺产生了各种实验结果。当氧离子通过引入氧气空位从荧光岩结构中的想法位置移动时，可能会误认为这种过渡的类型被误认为是第一类。

项目成果

S.Torng,K.Miyazawa and T.Sakuma: "The role of oxygen vacancies on the cubic-to-tetragonal phase transition in ZrO_2-CeO_2" Mater.Sci.Tech.(印刷中).

S.Torng、K.Miyazawa 和 T.Sakuma：“氧空位对 ZrO_2-CeO_2 中立方相到四方相变的作用”Mater.Sci.Tech.（出版中）。

T.Sakuma: "Heat treatment and Microstructure of portially-stabilized zirconia" “Heat and Surface '92"Ed,by I.Tamura The Jpn,Soc,Heat Treatment. 235-240 (1992)

T.Sakuma：“部分稳定氧化锆的热处理和微观结构”“Heat and Surface 92”Ed，作者：I.Tamura The Jpn，Soc，Heat Treatment 235-240 (1992)。

S.Torng, K.Miyazawa and T.Sakuma: "The role of oxygen vacancies on the cubic-to-tetragonal phase transition in ZrO2-CeO2" Mat.Sci.Tech.(printing).

S.Torng、K.Miyazawa 和 T.Sakuma：“氧空位对 ZrO2-CeO2 中立方相到四方相变的作用”Mat.Sci.Tech.（印刷版）。

T.Sakuma: "The cubic-to-tetragonal transformation in Zirconia alloys" Science and Technology of Zirconia. V. 86-98 (1993)

T.Sakuma：“氧化锆合金中的立方到四方相变”氧化锆科学与技术。

S.Torng,K.Miyazawa and T.Sakuma: "Microstructure of cubic and tetragonal zirconia in ZrO_2-CeO_2" MRS国際会議報告. (印刷中).

S. Torng、K. Miyazawa 和 T. Sakuma：“ZrO_2-CeO_2 中立方氧化锆和四方氧化锆的微观结构”MRS 国际会议报告（正在出版）。