| ZrO＿2—20wt％Al_2O_3陶瓷复合材料显微结构的TEM研究 |
| |
| 引用本文： | 李理,杨静漪,侯耀永.ZrO＿2—20wt％Al_2O_3陶瓷复合材料显微结构的TEM研究[J].青岛科技大学学报,1994(3). |
| |
| 作者姓名： | 李理 杨静漪 侯耀永 |
| |
| 摘 要： | 用透射电镜研究了（ＺｒＯ２＋ｘｍｏｌ％Ｙ２Ｏ３）－２０ｗｔ％Ａｌ２Ｏ３陶瓷复合材料的显微结构，发现在Ｙ２Ｏ３含量为２．０ｍｏｌ％～２．５ｍｏｌ％成分下，较大的（可达１μｍ）未转变颗粒仅限于嵌在Ａｌ２Ｏ３晶内的ＺｒＯ２（ｔ），当Ｙ２Ｏ３含量为３．０ｍｏｌ％时不嵌在Ａｌ２Ｏ３晶内的ＺｒＯ２（ｔ）颗粒（可达１．３μｍ）也可保持四方相结构。因此３．０ｍｏｌ％Ｙ２Ｏ３成分下四方相的急增及其最佳相交增韧效果归因于基体弹性模量的增加和适量稳定剂（Ｙ２Ｏ３）加入的共同作用结果。
|
| 关 键 词： | 氧化铁 氧化铝 陶瓷 显微结构 |
TEM Study on Microstructurt of ZrO_2-20wt% Al_2O3 Ceramics Compsite |
| |
| Li Li.TEM Study on Microstructurt of ZrO_2-20wt% Al_2O3 Ceramics Compsite[J].Journal of Qingdao University of Science and Technology:Natutral Science Edition,1994(3). |
| |
| Authors: | Li Li |
| |
| Affiliation: | Li Li (Departmet of Information)Yang Jingyi;Hou Yaoyong(Department of Applied Chemistry) |
| |
| Abstract: | The microstructure of (ZrO2 + xmol%Y2O3)-20wt % Al2O3 ceramic compsites has been studied by the TEM.It is found that for the specimens containing 2.0mol% ￣2.5mol %Y2O3, the larger untransfpormed particles(up to 1.0μm) are limited to only ZrO2(t)embedded within Al2O3 grains.For the specimens containing 3.0mol%Y2O3,however, the still larger ZrO2(t)particles(up to 1.3μm) unembedded within Al2O3 are still retained in their tetragonal state.Because of this the steep rise of the tetragonal Phase at 3.0mol %Y2O3 content and the optimum transformation toughening effect of (ZrO2+3.0mol%Y2O3)- 20 wt % Al2O3 ceramics obtained may be attrbuted to the increase in elastic modulus of the matrix and the addition of an appropriate stabilizing agent (Y2O3). |
| |
| Keywords: | zirconia alumina ceramics microstuctrure |
| 本文献已被 CNKI 等数据库收录！ |
