Crystallographic study on the isothermal and athermal martensite of zirconia

氧化锆等温和非温马氏体的晶体学研究

• 批准号: 16560579
• 负责人: HAYAKAWA Motozo
• 金额: $ 2.24万
• 依托单位: Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560579/
• 关键词: zirconia; yttria doped; martensite; athermal transformation; lens shaped martensite; pyramid shaped martensite; phenomenological theory; lattice invariant shear; 等温変態; 表面起伏; 板状マルテンサイト

The tetragonal phase of zirconia doped with a small amount of yttria (1.5-1.9 mol%) can be retained metastably at room temperature by rapid cooling. The metastable tetragonal phase undergoes both isothermal transformation by heating at around 200℃ and athermal transformation by subzero cooling. Both transformation products are believed to be martensite, but the crystallographic features can be different because of the large transformation temperatures and kinetics. In the present work, the crystallographic features of these martensites were studied by means of the scanning and transmission microscopy, atomic force microscopy, electron back scattering kikuchi pattern technique, etc. and the results were compared with the phenomenological theory of martensite crystallography.The main results are summarized below.1.The isothermal martensite exhibits a typical thin plate form, while the athermal martensite exhibits either lens-shaped or pyramid-shaped form.2.The lens shaped martensite contains no mid-rib but TEM observation revealed the striations of which direction were consistent with the (101)m twin trace. The thin plate martensite also contains striations but less dens than in lens shaped martensite.3.The habit planes of both isothermal thin plates and athermal lens were close to (310)c, which was in agreement with the prediction from the phenomenological theory where (101)m twins were assumed as the lattice invariant shear.4.The tilt angle of the surface relief of plate martensite was also consistent with the prediction from the phenomenological theory5.The pyramid-shaped martensite was found by TEM observation to be consisted of four variants. The details of the variant combination needs further study.

加入少量钇（1.5 ~ 1.9 mol%）的氧化锆在室温下快速冷却可保持亚稳态。亚稳四方相在200℃左右加热时发生等温转变，在零度以下冷却时发生非热转变。两种相变产物均为马氏体，但由于相变温度和动力学大，晶体学特征可能不同。本文采用扫描透射显微镜、原子力显微镜、电子背散射菊池图技术等研究了这些马氏体的晶体学特征，并将结果与马氏体晶体学的现象学理论进行了比较。主要结果总结如下：1。等温马氏体呈典型的薄板状，而非热马氏体呈透镜状或金字塔状2。透镜状马氏体不含中肋，但透射电镜观察显示，该方向的条纹与（101）m孪晶相一致。薄片状马氏体也有条纹，但比透镜状马氏体少。等温薄板和非热透镜的习惯面均接近（310）c，这与假设（101）m孪晶为晶格不变剪切的现象学理论预测一致。板状马氏体表面起伏的倾斜角也符合现象学理论的预测5。透射电镜观察发现，金字塔形马氏体由四种变体组成。变异组合的细节还有待进一步研究。

项目成果

Crystallographic study of the isothermal and athermal martensite of yttria doped zirconia

氧化钇掺杂氧化锆等温和非温马氏体的晶体学研究

• 发表时间: 2006
• 期刊: Materials Science & Engineering (in press)
• 作者: J.-H.Pee;M.Tada;M.Hayakawa
• 通讯作者: M.Hayakawa

Effect of CoO doping on the sintering ability and mechanical properties of Y-TZP

CoO掺杂对Y-TZP烧结能力和力学性能的影响

• 发表时间: 2004
• 期刊: Mater.Sci.Forum 449-452
• 作者: T.Onda;H.Yamauchi;M.Hayakawa
• 通讯作者: M.Hayakawa

Isothermal and athermal martensitic transformation in Y-stabilized zirconia

Y 稳定氧化锆中的等温和非热马氏体转变

• 发表时间: 2005
• 期刊: Proc.21st Korea-Japan International Seminar on Ceramics (in press)
• 作者: J-H.Pee;E-S.Choi;M.Hayakawa
• 通讯作者: M.Hayakawa

Fabrication of Al2O3-ZrO2(3Y-TZP) composites with graded structures by centrifugal slip casting method

离心注浆法制备梯度结构Al2O3-ZrO2(3Y-TZP)复合材料

• 发表时间: 2004
• 期刊: Mater.Sci.Forum 449-452
• 作者: X.Li;L.Wang;T.Onda;T.Akao;M.Hayakawa
• 通讯作者: M.Hayakawa

Crystallographic study of the isothermal and athermal martensites of yttria-doped zirconia

• DOI: 10.1016/j.msea.2005.12.062
• 发表时间: 2006-12-25
• 期刊: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
• 影响因子: 6.4
• 作者: Pee, Jae-Hwan;Tada, Masahiro;Hayakawa, Motozo
• 通讯作者: Hayakawa, Motozo