| CEMS和慢正电子束研究ZrO2(Y)中Fe的热动力学行为 |
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| 引用本文： | 俞方华,张桂林,於仕俊,翁惠民,张恒华.CEMS和慢正电子束研究ZrO2(Y)中Fe的热动力学行为[J].物理学报,1997,46(1):109-116. |
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| 作者姓名： | 俞方华 张桂林 於仕俊 翁惠民 张恒华 |
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| 作者单位： | (1)上海大学材料学院; (2)中国科学技术大学近代物理系; (3)中国科学院上海原子核研究所,中国科学院核分析技术开放实验室 |
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| 摘 要： | 用内转换电子穆斯堡尔谱（ＣＥＭＳ）和慢正电子束研究了含３％Ｙ2Ｏ3的ＺｒＯ2中57Ｆｅ离子（１００ｋｅＶ，３×１０16ａｔ．／ｃｍ2）注入态及其在氢气氛中退火的热力学行为．注入态以Ｆｅ3+，Ｆｅ2+和Ｆｅ0存在，它们分别是Ｆｅ3+-Ｖ（空位）复合体、二聚体和超顺磁颗粒．经４００，５００℃退火后，Ｆｅ3+-Ｖ分解，分别出现了α-Ｆｅ的前期相和α-Ｆｅ纳米颗粒．含Ｆｅ的ＺｒＯ2（Ｙ）混合导电的出现可能是和Ｆｅ的不同价态及其相对含量有关
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| 关 键 词： | 离子注入 铁离子 离子导电介质 CEMS |
| 收稿时间： | 8/9/1995 12:00:00 AM |
THERMODYNAMICAL BEHAVIOR OF 57Fe IMPLANTED IN ZrO2(Y) BY CEMS AND SLOW POSITRON BEAM |
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| YU FANG-HUA,ZHANG GUI LIN,YU SHI JUN,WENG HUI-MIN and ZHANG HANG-HUA.THERMODYNAMICAL BEHAVIOR OF 57Fe IMPLANTED IN ZrO2(Y) BY CEMS AND SLOW POSITRON BEAM[J].Acta Physica Sinica,1997,46(1):109-116. |
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| Authors: | YU FANG-HUA ZHANG GUI LIN YU SHI JUN WENG HUI-MIN and ZHANG HANG-HUA |
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| Abstract: | By using conversion electron M?ssbauer spectroscopy (CEMS) and slow positron beam Doppler broading spectrum,the behaviour of the 57Fe implanted (100keV,3×1016 at./cm2) ZYx contained Y2O3 has been studied.The states of Fe0,Fe2+ and Fe3+ ions were obtained from CEMS for as implanted samples.After annealing at 500℃,metallic iron particles α-Fe, were formed at expense of other components. From the S-E curve of the 57Fe as implanted sample,it was found that a large amount of cationic vacancies were distributed in a region of 0—50nm in ZY3.These vacancies disappeared largely after annealing at 500℃.Therefore the parameter S provided an evidence to identify the iron sites in the implanted sample.The ZY3 appeared mingle conducting property at 300℃.It probably correlates with different iron charge states,especially with that of Fe0.
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