摘要
高熵合金由于具有迟滞扩散效应,有望应用于热障涂层中的黏结层.该文系统研究了Cr元素对(CuFeMnNi)1-xCrx(x=0~0.25)合金显微组织和在4%氢氧化钠溶液中的耐腐蚀性能.结果表明,铸态(CuFeMnNi)1-xCrx(x=0、0.05和0.1)合金由FCC1和FCC2两相构成,铸态(CuFeMnNi)1-xCrx(x=0.15、0.2和0.25)合金则由FCC1、FCC2和BCC三相构成.通过动电位极化曲线和交流阻抗等电化学实验发现,试验合金的耐腐蚀性能随着Cr元素含量的增加而增强,不含Cr元素的CuFeMnNi合金耐蚀性比含Cr元素的合金差,本试验成分条件下,(CuFeMnNi)0.75Cr0.25合金的耐蚀性最好.
High-entropy alloys are expected to be applied to the bonding layer in thermal barrier coatings due to their sluggish diffusion effects.In this paper,the effect of Cr on the microstructures of(CuFeNiMn)1-xCrx alloy and the corrosion resistance in 4%sodium hydroxide solution were studied systematically.The results showed that the as-cast(CuFeMnNi)1-xCrx(x=0,0.05 and 0.1)alloys consisted of two phases(FCC1 and FCC2),and the as-cast(CuFeMnNi)1-xCrx(x=0.15,0.2 and 0.25)alloys were composed of FCC1,FCC2 and BCC.Potentiodynamic polarization curves and electrochemical impedance spectroscopy showed that the corrosion resistance of the alloys increased with the increasing of Cr element,and the corrosion resistance of CuFeMnNi alloy was worse than that of the alloys containing Cr.Moreover,the(CuFeMnNi)0.75Cr0.25 alloy had the best corrosion resistance in this investigation.
作者
陈旭
胡佳宣
张彦
高頔
刘烨
徐静
尹付成
CHEN Xu;HU Jia-xuan;ZHANG Yan;GAO Di;LIU Ye;XU Jing;YIN Fu-cheng(Key Laboratory of Materials Design and Preparation Technology of Hunan Province,Xiangtan University,Xiangtan 411105;Hunan Provincial Key Laboratory of Thin Film Materials and Devices,Xiangtan University,Xiangtan 411105;Guangdong Provincial Key Laboratory for Technology and Application of Metal Toughening,Guangdong Institute of Materials and Processing,Guangzhou 510650 China)
出处
《湘潭大学学报（自然科学版）》
CAS
2020年第3期24-31,共8页
Journal of Xiangtan University(Natural Science Edition)
基金
湖南省自然科学基金项目(2016JJ3121,2019JJ50585)
国家自然科学基金项目(51604240,51771160)。
关键词
黏结层
高熵合金
微观组织
耐腐蚀性
bonding layer
high-entropy alloy
microstructure
corrosion resistance
