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| 氧化锆-正铌酸镧复合陶瓷的力学性能 | |
| 引用本文： | 胡友根,张志力,周浪,曾照强,李箭.氧化锆-正铌酸镧复合陶瓷的力学性能[J].材料科学与工程学报,2002,20(3):428-431. |
| 作者姓名： | 胡友根 张志力 周浪 曾照强 李箭 |
| 作者单位： | 1. 南昌大学,化学与材料科学学院,江西,南昌,330057 2. 清华大学新型陶瓷与精细工艺国家重点实验室 3. Energy,Research,Corporation,CT06813,USA |
| 基金项目： | 江西省自然科学基金资助项目 ( 9950 0 3 0 )，清华大学新型陶瓷与精细工艺国家重点实验室开放课题资助项目 (KF0 0 0 1) |
| 摘 要： | 采用常压和热压烧结制备了掺入不同含量正铌酸镧 (LaNbO4)的四方ZrO2 基复合陶瓷。X 射线衍射分析表明经高温烧结后复合陶瓷中LaNbO4相保持稳定。测定了热压烧结条件下所制得的ZrO2 LaNbO4复合陶瓷的力学性能。结果表明 :LaNbO4的加入使材料的断裂韧性均较单一组份的ZrO2 或LaNbO4陶瓷有明显提高。对烧结LaNbO4多晶体进行了透射电镜分析 ,证实其晶粒内部普遍存在畴结构 ;对断口进行了扫描电镜分析 ,并对LaNbO4的作用机理进行了讨论 |
| 关 键 词： | 铌酸镧 氧化锆 复合陶瓷 韧性 |
| 文章编号： | 1004-793X(2002)03-0428-04 |
| 修稿时间： | 2002年1月20日 |
Mechanical Behavior of Tetragonal Zirconia-LaNbO4 Composite |
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| HU YOu gen ,ZHANG Zhi li,ZHOU Lang ,ZENG Zhao qiang ,LI Jian.Mechanical Behavior of Tetragonal Zirconia-LaNbO4 Composite[J].Journal of Materials Science and Engineering,2002,20(3):428-431. | |
| Authors: | HU YOu gen ZHANG Zhi li ZHOU Lang ZENG Zhao qiang LI Jian |
| Affiliation: | HU YOu gen 1,ZHANG Zhi li,ZHOU Lang 1,ZENG Zhao qiang 2,LI Jian 3 |
| Abstract: | Tetragonal zirconia based ceramic composites with different amounts of added LaNbO 4 have been prepared by conventional and hot press sintering. X ray diffraction analysis shows that LaNbO 4 phase in the composites remains stable after high temperature sintering processes. The Mechanical tests show that addition of LaNbO 4 significantly raises the fracture toughness of the composites. Transmission electronic microscopy of the sintered LaNbO 4 polycrystalline confirmed the extensive presence of domain structure in the LaNbO 4 grains. The fractured surfaces have been examined with SEM. The mechanism for effect of LaNbO 4 phase has been discussed. |
| Keywords: | LaNbO 4 Zirconia Ceramic composite Toughness |
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