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含Fe和Mn的Ni_(30)Cu_(70)固溶体团簇模型与耐蚀性研究

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Indexed by:期刊论文

Date of Publication:2009-11-11

Journal:金属学报

Included Journals:PKU、ISTIC、CSCD、SCIE、EI、Scopus

Volume:45

Issue:11

Page Number:1390-1395

ISSN No.:0412-1961

Key Words:Cu-Ni合金;Fe(Mn)添加;固溶体模型;团簇结构;耐腐蚀性能

Abstract:提出了一个极限田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Ni_(30)Cu_(70)(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(Fe_(1-x)Mn_x)Ni_(12)而分散到Cu基体中,因此极限固溶体合金成分为[M_1/_(13)Ni_(12)/_(13)]30Cu_(70)=[(Fe_(1-x)Mn_xNi_(12)]Cua_(30.3),M=(Fe_(1-x)Mn_x).采用X射线衍射和电化学腐蚀测试等方法,研究了[(Fe_(1-x)Mn_x)Ni_(12)]Cu_(30.3)合金的微观组织与耐腐蚀性能的关系.实验结果表明,对应于极限同溶体状念的[(Fe_(0.75)Mn_(0.25))Ni_(12)]Cua_(30.3)合金,在3.5%NaCl溶液中具有相对好的耐腐蚀性能.

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