| YCe-TZP陶瓷的低温时效 |
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| 引用本文： | 尹邦跃,王零森,林健凉,张金生,樊毅.YCe-TZP陶瓷的低温时效[J].中南大学学报(自然科学版),2000,31(4):335-338. |
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| 作者姓名： | 尹邦跃 王零森 林健凉 张金生 樊毅 |
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| 作者单位： | 中南大学 粉末冶金国家重点实验室，湖南 长沙 410083 |
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| 基金项目： | 粉末冶金国家重点实验室基金资助项目(9706-36) |
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| 摘 要： | 对化学共沉淀法制备的3Y-TZP,3Y2Ce-TZP(3％Y2O3-2％CeO2-ZrO2)和3Y4Ce-TZP(3％Y2O3-4％CeO2-ZrO2)纳米粉末进行了1450℃无压烧结，研究了这3种TZP陶瓷在250℃水蒸汽中时效150h前后抗弯强度和显微结构的变化．此外，结合红外光谱和EDAX能谱分析，探讨了3Y-TZP的时效老化机理．结果表明随着CeO2含量增加，TZP时效后抗弯强度的降低幅度减小，3Y4Ce-TZP几乎不发生时效老化现象；在时效过程中，3Y4Ce-TZP表面形成了CeO2保护层，防止了Y-OH键的形成，从而有效地抑制了t→m时效相变．
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| 关 键 词： | 3Y-TZP YCe-TZP 低温时效 老化 相变 |
| 文章编号： | 1005-9792(2000)04-0335-04 |
| 修稿时间： | 1999年9月14日 |
Low-temperature aging of YCe-TZP ceramics |
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| YIN Bang-yao,WANG Ling-sen,LIN Jian-liang,Zhang Jing-sheng,EAN Yi.Low-temperature aging of YCe-TZP ceramics[J].Journal of Central South University:Science and Technology,2000,31(4):335-338. |
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| Authors: | YIN Bang-yao WANG Ling-sen LIN Jian-liang Zhang Jing-sheng EAN Yi |
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| Abstract: | Nanometer powders of 3Y-TZP, 3Y2Ce-TZP(3％ Y2O3-2％ CeO2-ZrO2), and 3Y4Ce-TZP(3％ Y2O3-4％CeO2-ZrO2) which were prepared by coprecipitation method were pressureless sintered at 1 450℃ for 2h. The emphasiswas on the studies of variations of bending strength and microstructure before and after aging in 250℃ water vapour for150 h. The results showed that when CeO2 content increased, bending strength of TZPs was found to decrease slowly,and 3Y4Ce-TZP showed no degradation. Combined with IR and EDAX techniques, aging degradation mechanism for 3Y-TZP was investigated. It was proved that CeO2 protecting layer formed during aging was useful to prevent Y-OH bond for-mation, so t→m aging phase transformation was also effectively prevented. |
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| Keywords: | Y TZP YCe TZP low temperature aging degradation phase transformation |
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