Esmaily M, Mortazavi A N, Birbilis N, Allanore A
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, USA.
School of Engineering and Applied Sciences, Harvard University, Cambridge, USA.
Sci Rep. 2020 Sep 9;10(1):14833. doi: 10.1038/s41598-020-71903-0.
Chromium-iron (CrFe) binary alloys have recently been proposed to serve as the "inert" anode for molten oxide electrolysis (MOE). Herein, the effects of anodic polarization on physical and functional properties of CrFe anodes in the corrosive environment of MOE are studied via empirical observations and theoretical calculations. The findings indicate that the alloys form an inner chromia-alumina solid-solution covered by an MgCrO spinel layer. A survey into the electrical properties of the detected oxides suggests that the layered oxide scale function as an efficient conductor of electricity at elevated temperature. The formation mechanism of the oxides is also investigated.
铬铁（CrFe）二元合金最近被提议用作熔融氧化物电解（MOE）的“惰性”阳极。在此，通过实证观察和理论计算研究了阳极极化对MOE腐蚀环境中CrFe阳极物理和功能特性的影响。研究结果表明，该合金形成了一个由MgCrO尖晶石层覆盖的内氧化铬 - 氧化铝固溶体。对检测到的氧化物的电学性质进行的一项调查表明，这种层状氧化皮在高温下作为一种有效的导电体发挥作用。还研究了氧化物的形成机制。
