Al_xFeCoCrNiCu(x=0.25、0.5、1.0)高熵合金的组织结构和电化学性能研究  

Research on microstructure and electrochemical properties of Al_xFeCoCrNiCu(x=0.25,0.5,1.0) high-entropy alloys

作　　者：牛雪莲[1] 王立久[1] 孙丹[1] Julius Jellinek 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]阿贡国家实验室,美国芝加哥60439

出　　处：《功能材料》2013年第4期532-535,共4页Journal of Functional Materials

基　　金："十一五"国家科技支撑计划重大资助项目(2006BAJ04A04);辽宁省教育厅资助项目(2008282)

摘　　要：研究了不同Al含量AlxFeCoCrNiCu(x=0.25、0.5、1)高熵合金的组织结构,探讨了Al含量对合金电化学性能的影响,并与304不锈钢进行对比。结果表明,制备的高熵合金晶体结构由简单的FCC结构转为FCC和有序BCC结构。与此同时,随着Al含量的增加,合金的硬度越大,从165HV提高到485HV。极化曲线表明,在0.5mol/L H2SO4溶液和1mol/L NaCl溶液中,高熵合金和304不锈钢相比,Al0.5FeCoCrNiCu合金表现出较好耐腐蚀性和抗孔蚀能力。The microstructure of AlxFeCoCrNiCu（x=0.25,0.5,1） with different Al content have been studied.Their electrochemical properties are compared with 304 stainless steel and AlxFeCoCrNiCu high-entropy alloys.The results show that the structure of prepared high-entropy alloy is gradually changed from a single FCC phase to FCC phase and BCC phase with the addition of Al.With the addition of aluminum from x=0.25 to 1.0,the hardness of the alloys increase from 165 to 485 HV correspondingly.The polarization curves show that alloys has the better corrosion resistance than 304 stainless steel in 0.5mol/L H2SO4 solution and 1mol/L NaCl solution,and meanwhile Al0.5FeCoCrNiCu high-entropy alloy has the best comprehensive corrosion resistance.

关 键 词：高熵合金 组织结构 电化学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]