电子束蒸发沉积Al-Fe-Co-Cr-Ni-Cu高熵合金涂层耐蚀性研究  

Research on corrosion resistance of Al-Fe-Co-Cr-Ni-Cu high-entropy alloy coating by electron beam evaporation plating

作　　者：牛雪莲[1] 王立久[1] 孙丹[1] 董晶亮[1] 李长明[1] 

机构地区：[1]大连理工大学建设工程学部建材研究所,辽宁大连116024

出　　处：《大连理工大学学报》2013年第5期689-694,共6页Journal of Dalian University of Technology

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

摘　　要：研究电子束蒸发方法在工业常用的钢筋基体表面制备Alx FeCoCrNiCu(x=0.25,0.50,1.00)高熵合金涂层的工艺,探讨了铝含量对涂层耐蚀性的影响,并用X射线衍射(XRD)、原子力显微镜(AFM)和电子探针(EPMA)等手段对涂层的物相、形貌和化学成分进行分析.结果表明:光滑基底上得到的合金涂层表面平整、分布均匀,膜层致密,随着铝含量的升高,制备的高熵合金涂层的晶体结构由简单的FCC结构转变为FCC和BCC混合结构.极化曲线表明,在0.5mol/L H2SO4溶液和1mol/L NaCl溶液中,高熵合金涂层和304不锈钢相比具有更好的耐蚀性能.此外,Al0.5FeCoCrNiCu高熵合金涂层表现出更全面的耐蚀性和抗孔蚀能力.High-entropy alloy coatings of AlxFeCoCrNiCu （x= 0. 25,0. 50,1. 00） were prepared on steel bar using the electron beam evaporation plating technology, and the effects of different A1 contents on corrosion resistance of the coatings were discussed. The phase, microstructure and chemical composition of the prepared coatings were observed with XRD, AFM and EPMA. The experimental results show that the alloy coating surface prepared on smooth base is smooth and with well-distributed thickness, the produced membranous film is dense, and the structure of the prepared high-entropy alloy coating is gradually changed from a single FCC phase to a mixture phase of FCC and BCC with the increase of AI content. The polarization curves show that high-entropy alloy coating has better corrosion resistance than 304 stainless steel in 0.5 mol/L H2SO4 solution and 1 mol/L NaC1 solution, meanwhile A10.sFeCoCrNiCu high-entropy alloy coating has the best comprehensive corrosion resistance and pit-corrosion resistance.

关 键 词：高熵合金涂层 电子束蒸发 微观结构 耐腐蚀性能 

分 类 号：TG146[一般工业技术—材料科学与工程]