Study on Preparation and Corrosion Resistance of Graphene-Ni 35 Co 30 Cu 20 Fe 15 High Entropy Alloy Composites
Study on Preparation and Corrosion Resistance of Graphene-Ni 35 Co 30 Cu 20 Fe 15 High Entropy Alloy Composites
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石墨烯-Ni 35 Co 30 Cu 20 Fe 15 高熵合金复合材料的制备及耐蚀性研究
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Meng Wang
中科院分区：
文献类型：
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作者：
Lingyu Xu;H. Cai;Xing;Pei Wang;Meng Wang
采用球磨和放电等离子烧结（SPS）方法制备了石墨烯/Ni 35 Co 30 Cu 20 Fe 15高熵合金复合材料。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射仪（XRD）和拉曼光谱仪对石墨烯及其复合材料的微观结构进行了表征。采用维氏硬度计和化学工作站测试了复合材料的硬度和耐蚀性。结果表明，球磨可以实现石墨烯在复合材料中的均匀分布，且没有破坏石墨烯的原有结构。石墨烯的加入提高了高熵合金复合材料的硬度和耐腐蚀性能。与Ni 35 Co 30 Cu 20 Fe 15高熵合金相比，添加0.3wt.%石墨烯从255 HV增加到310 HV。石墨烯的加入使复合材料在3.5%NaCl溶液中的自腐蚀电位从-0.5V提高到-0.2V，自腐蚀电流密度从2×10 - 5A/cm 2降低到8×10 - 6A/cm 2，大大提高了材料的耐腐蚀性能。
The graphene/Ni 35 Co 30 Cu 20 Fe 15 high entropy alloy composites were successfully prepared by ball milling and spark plasma sintering (SPS) methods. The microstructures and structures of graphene and composites were measured by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. The hardness and corrosion resistance of the composites were tested by Vivtorinox hardness tester and chemical workstation. The results showed that the homogeneous distribution of graphene in the composites can be achieved by ball milling, and the original structure of graphene was not destroyed. The addition of graphene improved the hardness and corrosion resistance of high entropy alloy composites. Compared with the Ni 35 Co 30 Cu 20 Fe 15 high entropy alloy, the hardness of the high entropy alloy with 0.3 wt.% Graphene increased from 255HV to 310HV. The addition of graphene increased the corrosion potential of the composite in 3.5% NaCl solution from -0.5V to -0.2V and the corrosion current density from 2×10 -5 A/cm 2 reduced to 8×10 -6 A/cm 2 , which greatly improved the corrosion resistance of the material.