| 稀土氧化物在复合PSZ材料中的作用 |
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| 引用本文： | 陈玉如,张琪,刘文西,吴厚政.稀土氧化物在复合PSZ材料中的作用[J].天津大学学报(自然科学与工程技术版),2000,33(4):530-533. |
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| 作者姓名： | 陈玉如 张琪 刘文西 吴厚政 |
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| 作者单位： | [1]教育部高温结构陶瓷与工程陶瓷加工技术重点实验室,天津大 [2]天津大学材料科学与工程学院, |
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| 基金项目： | 国家“863”基金资助项目(715-20-02-05)，国家自科学基金资助项目(59502003)． |
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| 摘 要： | 复合稳定ＺｒＯ２在高温热处理过程中，发生立方相向四方相的相变，由于Ｙ２Ｏ３或Ｃｅ２Ｏ３和ＭｇＯ的复合稳定作用，相变过程产生大量介稳的ｔ－ＺｒＯ２析出体。可相变四方相含量随热处理时间而增加，其中外２ｍｏｌ％Ｙ２Ｏ３的（Ｙ，Ｍｇ）－ＰＳＺ／ＭｇＡｌ２Ｏ４材料处理至８００ｈ仍未降低。热处理过程中Ｙ２Ｏ３和Ｃｅ２Ｏ３始终存在于晶格中稳定ＺｒＯ２．复合稳定剂充分体现了对立方和四方相的稳定作用，多元ＰＳＺ的稳
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| 关 键 词： | 稀土复合物 复合稳定 二氧化碳 陶瓷材料 |
| 文章编号： | 0493-2137(2000)04-0530-04 |
| 修稿时间： | 1999-12-12 |
THE ROLE OF RARE EARTH OXIDES IN COMPLEX PARTIALLYSTABILIZED ZIRCONIA |
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| CHEN Yu-ru,ZHANG Qi,LIU Wen-xi,WU Hou-zheng.THE ROLE OF RARE EARTH OXIDES IN COMPLEX PARTIALLYSTABILIZED ZIRCONIA[J].Journal of Tianjin University(Science and Technology),2000,33(4):530-533. |
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| Authors: | CHEN Yu-ru ZHANG Qi LIU Wen-xi WU Hou-zheng |
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| Institution: | CHEN Yu-ru ;
(State Education Ministry Key Lab of High Temperature Structural Ceramics and Engineering
Ceramics Machining Techanology ,Tianjin University,Tianjin 300072,China);
ZHANG Qi ,LIU Wen-xi ;
(School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China);
WU Hou-zheng ;
(State Education Ministry Key Lab of High Temperature Structural Ceramics and Engineering
Ceramics Machining Techanology ,Tianjin University,Tianjin 300072,China) |
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| Abstract: | The cubic zirconia ceramics stabilized by yttria or ceria and magnesia transform to tetragonal phase and a great amount of tetragonal precipitate from cubic matrix when ageing at high temperatures.The transformable tetragonal content increases with the ageing time,especially for (Y,Mg) PSZ/MgAl 2O 4 with 2 mol% Y 2O 3,whose tetragonal phase content increases even after ageing for 800 h.In the process of heat treatment,yttria or ceria exists in the crystal lattice of zirconia to stabilize cubic and tetragonal zirconia.Moreover,the complex stabilized zirconia ceramics are very sensitive to the amount of yttria,but insensitive to ceria. |
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| Keywords: | rare earth oxide complex stabilization phase compositions |
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