Rekha M Y, Mallik Nitin, Srivastava Chandan
Department of Materials Engineering, Indian Institute of Science, Bangalore, 560012, India.
Sci Rep. 2018 Jun 7;8(1):8737. doi: 10.1038/s41598-018-27096-8.
This is the first report on synthesis of multimetal high entropy alloy (HEA) nanoparticle-few layer graphene composite. A two-step methodology for synthesizing multi-component HEA nanoparticle-graphene composite is provided. In the first step, high purity graphite powder was mechanically milled with metal powders (Ni, Cr, Co, Cu, Fe) to produce multimetal-graphite composite. This composite was then sonicated with sodium lauryl sulphate (SLS) for 2 hours to produce a dispersion of graphene decorated with multi-component nanoparticles with face centred cubic structure. Potentiodynamic polarization and electrochemical impedance spectroscopy methods revealed that the HEA nanoparticle graphene composite possess excellent corrosion resistance properties which was better than the corrosion resistance exhibited by milled and exfoliated graphene. The HEA nanoparticle-graphene composite can be used for corrosion resistant coating applications.
这是关于多金属高熵合金（HEA）纳米颗粒-少层石墨烯复合材料合成的首份报告。提供了一种用于合成多组分HEA纳米颗粒-石墨烯复合材料的两步法。第一步，将高纯度石墨粉与金属粉末（镍、铬、钴、铜、铁）进行机械研磨，以制备多金属-石墨复合材料。然后将该复合材料与十二烷基硫酸钠（SLS）超声处理2小时，以制备装饰有具有面心立方结构的多组分纳米颗粒的石墨烯分散体。动电位极化和电化学阻抗谱方法表明，HEA纳米颗粒石墨烯复合材料具有优异的耐腐蚀性能，优于研磨和剥离石墨烯所表现出的耐腐蚀性。HEA纳米颗粒-石墨烯复合材料可用于耐腐蚀涂层应用。
