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金属学报  2009, Vol. 45 Issue (11): 1390-1395    
  论文 本期目录 | 过刊浏览 |
含Fe和Mn的Ni30Cu70固溶体团簇模型与耐蚀性研究
张杰;王清;王英敏;董闯
大连理工大学三束材料改性教育部重点实验室; 大连 116024
STUDY ON THE CLUSTER--BASED MODEL OF Ni30Cu70 SOLID SOLUTION WITH Fe AND Mn AND ITS CORROSION RESISTANCE
ZHANG Jie; WANG Qing; WANG Yingmin; DONG Chuang
Key Lab of Materials Modification by Laser; Ion and Electron Beams of Ministry of Education;
School of Materials Science $\&$ Engineering; Dalian University of Technology; Dalian 116024
引用本文:

张杰 王清 王英敏 董闯. 含Fe和Mn的Ni30Cu70固溶体团簇模型与耐蚀性研究[J]. 金属学报, 2009, 45(11): 1390-1395.
, , , . STUDY ON THE CLUSTER--BASED MODEL OF Ni30Cu70 SOLID SOLUTION WITH Fe AND Mn AND ITS CORROSION RESISTANCE[J]. Acta Metall Sin, 2009, 45(11): 1390-1395.

全文: PDF(1007 KB)  
摘要: 

提出了一个极限固溶体合金的团簇模型, 在此基础上优化设计了添加Fe和Mn的Ni30Cu70 (原子分数,\%)固溶体合金成分. 在该模型中, 固溶的Fe和Mn以Ni为第一近邻形成12配位立方八面体原子团簇(Fe1-xMnx)Ni12而分散到Cu基体中, 因此极限固溶体合金成分为 [M1/13Ni12/13]30Cu70=[(Fe1-xMnx)Ni12]Cu30.3, M=(Fe1-xMnx). 采用X射线衍射和电化学腐蚀测试等方法, 研究了[(Fe1-xMnx)Ni12]Cu30.3合金的微观组织与耐腐蚀性能的关系. 实验结果表明, 对应于极限固溶体状态的[(Fe0.75Mn0.25)Ni12]Cu30.3合金, 在3.5%NaCl溶液中具有相对好的耐腐蚀性能.

关键词 Cu-Ni合金Fe(Mn)添加固溶体模型团簇结构耐腐蚀性能    
Abstract

Minor Fe and Mn additions are necessary to enhance the corrosion resistance of commercial Cu-Ni alloys. The present paper aims at optimizing the addition amounts of Fe and Mn in Cu70Ni30 (atomic fraction, %) alloy using a cluster-based solid solution model. In this model it assumed that one Fe(Mn) atom and twelve Ni atoms formed a cluster consisted of Fe(Mn)-centered and Ni-surrounded cube-octahedron and the limit solid solution would be composed of isolated Fe(Mn)Ni12 clusters embedded in the Cu matrix. The ratio of the Fe(Mn) atoms and its surrounding Ni atoms is 1∶12, and the limit solid solution composition of Fe(Mn)-modified Cu70Ni30 alloy is [M1/13Ni12/13]30Cu70=[(Fe1-xMnx)Ni12]Cu30.3, M=(Fe1-xMnx). The OM, XRD and electrochemical corrosion measurements were used to characterize the microstructure and corrosion resistance performance of [(Fe1-xMnx)Ni12]Cu30.3. The results indicated that the solid solubility limitative alloys [(Fe0.75Mn0.25)Ni12]Cu30.3 has the best corrosion resistance in 3.5%NaCl aqueous solution.

Key wordsCu-Ni alloy    addition of Fe(Mn)    solid solution model    cluster structure    corrosion-resistance
收稿日期: 2009-04-29     
ZTFLH: 

TG111

 
基金资助:

国家自然科学基金项目50671018和50631010, 国家重点基础研究发展计划项目2007CB613902及国家高技术研究发展计划项目2007AA05Z102资助

作者简介: 张杰, 男, 1979年生, 博士生

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