应用单辊甩带法制备非晶态Fe78Si13B9和Fe73.5Si13.5B9Nb3Cu1薄带,并以非晶晶化退火法制备出纳米晶Fe73.5Si13.5B9Nb3Cu1薄带.利用X射线衍射(XRD)仪和示差扫描量热计(DSC)对该非晶薄带的非晶特性及其晶化过程进行了研究.并用电化学极化曲线的方法和电化学阻抗技术研究了非晶态Fe78Si13B9和纳米晶Fe73.5Si13.5B9Nb3Cu1合金在1mol/LNaOH溶液里的电化学腐蚀行为,用SEM对极化测试后的试样形貌进行了观察;同时还研究了不同的热处理温度对材料结构及在1mol/LNaOH溶液里耐腐蚀性能的影响.结果表明,该非晶薄带的晶化过程分为两步;纳米晶比非晶合金的耐腐蚀性要好;且随着热处理温度的升高,非晶和纳米晶的耐腐蚀性能都得到提高.
In this study,amorphous Fe78Si13B9 and Fe73.5Si13.5B9Nb3Cu1 ribbons were prepared by the chill block melt-spinning process and nanocrystalline Fe73.5Si13.5B9Nb3Cu1 ribbons were obtained by annealing. The amorphous ribbons and their crystallization processes were identified by differential scanning calorimeter (DSC) and X-ray diffraction (XRD). A comparative study of the electrochemical corrosion behaviors of Fe78Si13B9 and Fe73.5Si13.5B9Nb3Cu1 amorphous and nanocrystallized alloys was performed by linear polarization method and electrochemical impedance spectroscopy (EIS) in 1mol/L NaOH solutions. The photographs of the samples after potentiodynamic polarization were observed by SEM. The influence of heat treatment on the alloys structure and corrosion resistance in 1mol/L NaOH solutions was investigated. The results show that the crystallization of amorphous ribbons occurs in two steps,nanocrystalline alloys have a higher corrosion resistance than amorphous alloys,and the corrosion resistances of amorphous and nanocrystalline alloys increase as thermal treatment temperature rises.
[1]Vara G,Pierna A R,Jimenez J A,et al.Influence of nickel content on the electrochemical behavior of finemet type amorphous and nanocrystalline alloys[J].Journal of Non-Crystalline Solids,2007,353:1008-1010.
[2]Laura Elbaile,Angel R,Gemma Vara Pierna,et al.Effect of the oxidation in the surface coercive force ofnanocrystalline Fe73.5Cu1Nb3Si13.5B9alloy[J].Journal of Magnetism and Magnetic Materials,2006,304:e630-e632.
[3]Baron A,Szewieczek D,Nawrat G.Corrosion of amor-phous and nanocrystalline Fe-basedalloys and its influ-ence on their magnetic behavior[J].Electrochimica Ac-ta,2007,52:5690-5695.
[4]Baranowska J,Franklin S E.Characterization of gas-ni-trided austenitic steel with anamorphous/nanocrystalline top layer[J].Wear,2008,264:899-903.
[5]Liu Lin(柳林),Sun Min(孙民),Chen Qi(谌祺),et al.Crystallization,mechanical and corrosion properties of Zr-Cu-Ni-Al-Nb bulk glassy alloys[J].Acta Phys Sin,2006,55(4):1930-1933.
[6]Jozef Sitek,Jarmila Degmova′,Katarinna Sedlacˇkova,et al.External influence on magnetic properties of Fe-based nanocrystalline alloys[J].Journal of Magnetism and Magnetic Materials,2006,304:e697-e699.
[7]Mondal K,Murty B S,Chatterjee UK.Electrochemical behavior of multicomponentamorphous and nanocrystal-line Zr-based alloys in different environments[J].Cor-rosion Science,2006,48:2212.
[8]Szewieczek D,Baron A.Electrochemical corrosion and its influence on magnetic properties of Fe75.5Si13.5B9Nb3Cu1alloy[J].Journal of Materials Processing Technology,2005,164:940.
[9]Wang Cheng(王成),Zhang Qing-sheng(张庆生),Jiang Feng(江峰).Corrosion behavior of Zr55Al10Cu30Ni5amorphous alloy in NaOH solution[J].Rare Metal Materials and Engineering,2003,32(10):814-816.
[10]Pardo A,Otero E,Merino M C,et al.The influence of Cr addition on the corrosion resistance of Fe73.5Si13.5B9Nb3Cu1metallic glass in marine environments[J].Corrosion Science,2002,44:1193-1200.
[11]Souza C AC,May J E,Carlos I A,et al.Influence of the corrosion on the saturation magnetic density of a-morphous and nanocrystalline Fe73Nb3Si15.5B7.5Cu1and Fe80Zr3.5Nb3.5B12Cu1alloys[J].Journal of Non-Crys-talline Solids,2002,304:210-216.
[12]Cremaschi V,Avram I,Sirkin H,et al.Electrochemi-cal studies of amorphous,nanocrystalline and crystal-line FeSiB based alloys[J].Scripta Materialia,2002,46:95-100.
