| 稀土镧在Fe-La合金系中的晶界扩散行为 |
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| 引用本文： | 陈树明,王海燕,张红伟,高雪云,刘宗昌.稀土镧在Fe-La合金系中的晶界扩散行为[J].特殊钢,2016,37(5):14-16. |
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| 作者姓名： | 陈树明 王海燕 张红伟 高雪云 刘宗昌 |
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| 作者单位： | 1. 内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室，包头 014010;
2. 内蒙古科技大学材料与冶金学院，包头 014010 ；
3. 广东省现代焊接技术重点实验室，广州 510650; |
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| 基金项目： | 国家自然科学基金(51101083)；
广东省现代焊接技术重点实验室2015年开放课题资助 |
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| 摘 要： | 通过高频悬浮炉熔炼成实验用30Fe-70La合金,将该合金切成8 mm×8 mm×6 mm试样与同样尺寸纯铁试样扩散面对接,并借助Gleeble-1500D热模拟试验机在760℃和770℃ 30 min,10-3 Pa真空和1 MPa压力下进行扩散试验;采用Axiovert 25型金相显微镜与QUANTA 400环境扫描电子显微镜,观察了稀土镧在Fe基体的扩散;利用相关扩散系数公式计算了镧在纯铁中的扩散系数。结果表明,稀土元素镧在纯铁中沿着α-Fe晶界进行扩散,镧在纯铁铁素体晶界中770℃时的扩散系数为Db=1.59×10-17m2/s。
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| 关 键 词： | 稀土元素镧 Fe-La合金 纯铁 扩散焊 晶界 扩散系数 |
| 收稿时间： | 2016-05-04 |
Diffusion Behavior of Rare Earth Element Lanthanum in Grain Boundaries of Fe-La Alloy Series |
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| Chen Shuming,Wang Haiyan,Zhang Hongwei,Gao Xueyun,Liu Zongchang.Diffusion Behavior of Rare Earth Element Lanthanum in Grain Boundaries of Fe-La Alloy Series[J].Special Steel,2016,37(5):14-16. |
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| Authors: | Chen Shuming Wang Haiyan Zhang Hongwei Gao Xueyun Liu Zongchang |
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| Affiliation: | 1. Key Laboratory of Integrated Exploitation of Inner Mongolia Baiyun Obo Multi-Metal Resource, Baotou 014010;
2. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010；
3. Guangdong Key Laboratory of Advanced Welding Technology, Guangzhou 510650; |
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| Abstract: | Tested 30Fe-70La alloy is melted by a high frequency suspending melting furnace and cut to 8 mm x 8 mm x6 mm specimen and butted on same size pure iron specimen, then the diffusion test is carried out at 10-3 Pa vacuum and 1 MPa pressure at 760℃ and 770℃ 30 min by Gleeble-1500D hot simulation experiment machine； the diffusion of rare earth element lanthanum in Fe matrix is observed by Axiovert 25 optical microscope and QUANTA 400 environmental scanning electron microscope, and the diffusion coefficient of lanthanum in pure iron is calculated by relative diffusion coefficient formulas. Results show that the diffusion of rare earth element lanthanum in pure iron is carried out along a-Fe grain boundaries, and the diffusion coefficient Db of lanthanum in grain boundaries of pure iron ferrite is 1. 59 x 10-17m2/s. |
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| Keywords: | Rare Earth Element Lanthanum Fe-La Alloy Pure Iron Diffusion Welding Grain Boundaries Diffusion Coefficient |
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