Relationship between Grain Boundary Segregation Phenomena and Phase Transformation in Zirconia Ceramics

氧化锆陶瓷晶界偏析现象与相变的关系

• 批准号: 06650809
• 负责人: TSUBAKINO Harushige
• 金额: $ 1.22万
• 依托单位: Himeji Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650809/
• 关键词: Grain boundary phase; Amorphous phase; Alumina addition; Partially stabilized zirconia; Martensite transformation; Mechanical property; シリカ; 粒界非晶質相,; 粒界相組成,; マルテンサイト変態,; 変態速度,

The mixed powders of ZrO_2-3mol% Y_2O_3 (partially stabilized zirconia) and Al_2O_3 are pressed and sintered at various temperatures ranging 1673 to 1973 K.Sintered bodies are investigated mainly by X-ray diffraction technique, TEM observations and estimation of mechanical properties. The resultso btained are as follows :(1) Bending strength and fracture toughness increase with the addition of alumina.(2) The tetragonal to monoclinic phase transformation takes place isothermally. With the addition of alumina, overall trans-formation rate decreases ; i.e., the nucleation rate of martensite lath decreases drastically but the growth stage is not affected, irrespective of alumina addition.(3) In grain boundaries of PSZ containing alumina, amorphous phase enriched with alumina, silica, zirconia is formed. Its thickness increases with sintering temperature.(4) The suppression of phase transformation and improvement of mechanical properties are attributed tothe formation of grain boundary amorphous phase. Silica plays an important role for theformation of grain boundary phase.

将ZrO_2- 3mol%Y_2O_3（部分稳定氧化锆）和Al_2O_3的混合粉末在1673 ~ 1973 K的温度范围内压制烧结。结果表明：（1）随着氧化铝的加入，材料的抗弯强度和断裂韧性均有所提高。(2)从四斜晶系到单斜晶系的相变是等温进行的。随着氧化铝的加入，总转化率降低;即，马氏体板条的形核速率急剧降低，但不影响生长阶段，与氧化铝的添加无关。(3)在含Al_2O_3的PSZ晶界处形成了富含Al_2O_3、SiO_2、ZrO_2的非晶相。其厚度随烧结温度的升高而增加。(4)晶界非晶相的形成抑制了相变，提高了力学性能。SiO2对晶界相的形成起着重要作用。

项目成果

H.Tsubakino,et al.: "Effect of Sintering Time on the Mechanical Properties in Y-PSZ-Al_2O_3 Ceramics" Proc.2nd Pacific Rim Inter.Conf.on Advanced Materials and Processing. 3. 2717-2723 (1995)

H.Tsubakino 等人：“烧结时间对 Y-PSZ-Al_2O_3 陶瓷机械性能的影响”Proc.2nd Pacific Rim Inter.Conf.on Advanced Materials and Manufacturing。

H.Tsubakino et al: "Effect of Sintering Time on the Mechanical Properties in Y‐PSZ‐Al_2O_3 Ceramics" Proc.2nd Pacific Rim Inter.Conf. on Advanced Materials and Processing. 3. 2717-2723 (1995)

H.Tsubakino 等人：“烧结时间对 Y-PSZ-Al_2O_3 陶瓷机械性能的影响”Proc.2nd Pacific Rim Inter.Conf，先进材料和加工。 3. 2717-2723 (1995)

H.Tsubakino et al: "Improvement of Mechanical Properties by the Firmation of a Grain Boundary Phase in ZrO_2-3mol% Y_2O_3-Al_2O_3 Ceramics" Ceramics Trans. 60. 265-274 (1994)

H.Tsubakino%20et%20al:%20"改进%20of%20Mechanical%20Properties%20by%20the%20Firmation%20of%20a%20Grain%20Boundary%20Phase%20in%20ZrO_2-3mol%%20Y_2O_3-Al_2O_3%20Ceramics"%20Cer阿米克斯

H.Tsubakino et al: "Isothermal Transformation Behaviours of Martensite in Zirconia‐3mol% Y ttria Containing Alumina" Solid→Solid Phase Transformations,ed. by W.C. Johnson et al,TMS. 749-754 (1994)

H.Tsubakino 等人：“含有氧化铝的氧化锆 - 3mol% Y ttria 中的马氏体的等温转变行为”固体→固相转变，W.C. Johnson 等人编，TMS 749-754。

H.Tsubakino et al: "Isothermal Transformation Behaviors of Martensite in Zirconia-3mol% Yttria Containing Alumina" Solid-Solid Phase Transformations, TMS-AIME. 749-754 (1994)

H.Tsubakino%20et%20al:%20"等温%20Transformation%20Behaviors%20of%20Martensite%20in%20Zirconia-3mol%%20Yttria%20Containing%20Alumina"%20Solid-Solid%20Phase%20Transformations,%20TMS-AIME.%20749