| La2NiO4.147体系相变的低频内耗 |
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| 引用本文： | 张华力,刘卫,苏金瑞,丁锦文,陈初升. La2NiO4.147体系相变的低频内耗[J]. 金属学报, 2003, 39(11): 1157-1159 |
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| 作者姓名： | 张华力 刘卫 苏金瑞 丁锦文 陈初升 |
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| 作者单位： | 中国科学技术大学材料科学与工程系内耗与固体缺陷实验室,合肥,230026 |
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| 摘 要： | 通过电化学加氧方法获得额外氧含量δ=0．147、结构为Fmmm的La2NiO4 δ样品，低频内耗测量表明，400K温区附近存在一个相变内耗峰，它对应体系从低温正交Fmmm相到高温四方I4／mmm相的转变，模量和内耗的升、降温回滞现象反映此相变为一级相变．变频和改变升温速率内耗实验表明，内耗峰高与测试频率成反比，与升温速率成正比，具有马氏体相转变特征，低δ值的La2NiO4 δ样品无此相变峰，说明此峰应与低温正交Fmmm相中额外氧的三维有序变化相关。
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| 关 键 词： | La2NiO4 额外氧 低频内耗 马氏体相变 |
| 文章编号： | 0412-1961(2003)11-1157-03 |
| 修稿时间： | 2003-07-09 |
PHASE TRANSITION IN La2NiO4.147 SYSTEM STUDIED BY LOW-FREQUENCY INTERNAL FRICTION TECHNIQUE |
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| ZHANG Huali,LIU Wei,SU Jinrui,DING Jinwen,CHEN ChushengLaboratory of Internal Friction and Defects in Solids. PHASE TRANSITION IN La2NiO4.147 SYSTEM STUDIED BY LOW-FREQUENCY INTERNAL FRICTION TECHNIQUE[J]. Acta Metallurgica Sinica, 2003, 39(11): 1157-1159 |
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| Authors: | ZHANG Huali LIU Wei SU Jinrui DING Jinwen CHEN ChushengLaboratory of Internal Friction Defects in Solids |
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| Affiliation: | ZHANG Huali,LIU Wei,SU Jinrui,DING Jinwen,CHEN ChushengLaboratory of Internal Friction and Defects in Solids,Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026 |
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| Abstract: | |
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| Keywords: | La2NiO4 excess oxygen internal friction phase transition |
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