| AES与计算机模拟技术研究Ce-P晶界共偏聚 |
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| 引用本文： | 张东彬,吴承建,杨让.AES与计算机模拟技术研究Ce-P晶界共偏聚[J].北京科技大学学报,1990(6). |
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| 作者姓名： | 张东彬 吴承建 杨让 |
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| 作者单位： | 北京科技大学材料科学与工程系
(张东彬，吴承建)，北京科技大学材料科学与工程系(杨让) |
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| 摘 要： | 用俄歇能谱分析(AES),结合计算机模拟技术研究稀土元素Ce与杂质元素P在铁中的晶界共偏聚规律。实验结果表明,在P含量较低的情况下,Ce有抑制P晶界偏聚的作用,而当P含量较高时,Ce却有促进P晶界偏聚的作用。计算机模拟结果表明,当晶界上P的偏聚量不同时,Ce原子与P原子在晶界形成的偏聚结构不同。Ce对P在晶界偏聚作用的改变主要是因为晶界偏聚的P浓度不同使Ce与P晶界共偏聚所形成的最低能量结构改变。
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| 关 键 词： | 晶界偏聚 俄歇能谱分析 计算机模拟 Ce-P相互作用 |
Study of Ce-P Cosegregation on Grain Boundaries by AES and Computer Modelling |
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| Zhang Dongbin Wu Chengjian Yang Rang.Study of Ce-P Cosegregation on Grain Boundaries by AES and Computer Modelling[J].Journal of University of Science and Technology Beijing,1990(6). |
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| Authors: | Zhang Dongbin Wu Chengjian Yang Rang |
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| Institution: | Zhang Dongbin Wu Chengjian Yang Rang Department of Materials Science and Engineering |
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| Abstract: | The Ce and P cosegregation on the grain boundaries in a-iron was studied by Auger Electron Syectroscopy (AES) and computer modelling method. The result shows that in case of low P content in the alloys (P< 0.07wt%), Ce reduces the grain boundary segregation of P, but in the high P alloys (P>0.10wt%), Ce enhances the segregation of P. The computer modelling of this phenomenon indicates that the segregation structure of Ce and P on the grain boundary varies with the change of P content on the boundary. The main reason of the change of the interaction between Ce and P on the grain boundary is that the lowest energy structure of Ce-P cosegregation varies. |
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| Keywords: | cerium phosphorus grain boundary segregation AES analysis computer modelling Ce-P interactions |
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