摘要
纳米多孔金属的力学性能对其在柔性电子领域的应用具有重要意义.本文报道了一种高强度、高硬度、柔韧性好的纳米多孔Cu@Zr-Cu-Al金属玻璃(NP Cu@Zr-Cu-Al MG)复合材料,该材料采用两步脱合金法合成.首先,从Cu_(46)Zr_(23.5)Y_(23.5)Al_(7)合金的伪二元MG体系(Zr_(47)Cu_(46)Al_(7)MG+Y_(47)Cu_(46)Al_(7)MG)中选择性蚀刻活性富Y的MG相,制备了柔性纳米多孔Zr-Cu-Al金属玻璃(NP Zr-Cu-Al MG).进一步蚀刻得到NP Cu@Zr-Cu-Al MG,其中Cu层均匀地覆盖在MG韧带基体上.由于NP Cu@Zr-Cu-Al MG的无裂纹结构和柔性Zr-Cu-Al MG的存在,使其具有良好的柔性.NP Cu@Zr-Cu-Al MG的抗拉强度高达143.9 MPa,纳米硬度高达0.79 GPa.Zr-Cu-Al MG强化相抑制了Cu@Zr-Cu-Al韧带的断裂,有效抑制了裂纹在NP Cu@Zr-Cu-Al MG中的萌生和扩展,提高了复合材料的综合力学性能.NP Cu@Zr-Cu-Al MG可直接用作超级电容器和葡萄糖生物传感器的电极,比纯NP Zr-Cu-Al MG电极展现出更好的电导率和超电容容量.
The mechanical properties of nanoporous metals(NPMs)are very important for their potential applications in flexible electronics.Here,the NP Cu@Zr-Cu-Al metallic glass(NP Cu@Zr-Cu-Al MG)composite with high strength,high hardness,and good flexibility is reported.The NP Cu@Zr-Cu-Al MG was synthesized by a two-step dealloying method.First,the flexible NP Zr-Cu-Al MG was prepared by selective etching the active Y-rich MG from the pseudobinary MG system(Zr_(47)Cu_(46)Al_(7)MG+Y_(47)Cu_(46)Al_(7)MG)of Cu46Zr23.5-Y23.5Al7 alloy.The NP Cu@Zr-Cu-Al MG was then obtained by further etching the NP Zr-Cu-Al MG and the Cu layer was evenly covered on the MG matrix of ligaments.The NP Cu@Zr-Cu-Al MG demonstrated good flexibility due to its non-cracking structure and the existence of flexible Zr-Cu-Al MG.Additionally,the NP Cu@Zr-Cu-Al MG showed the highest tensile strength of 143.9 MPa and nanohardness of0.79 GPa among all the reported NPMs.The Zr-Cu-Al MG strengthening phase weakened the rupture of Cu@Zr-Cu-Al ligaments,which could effectively restrain the crack initiation and propagation in the NP Cu@Zr-Cu-Al MG.Finally,it could improve the comprehensive mechanical properties.The NP Cu@Zr-Cu-Al MG was applied as an electrode for supercapacitors and glucose biosensors.The NP Cu@Zr-Cu-Al MG electrode displayed better conductivity and supercapacitor capacitance than the bare NP Zr-Cu-Al MG electrode.
作者
王超洋
李章溢
朱胜利
梁砚琴
崔振铎
吴水林
秦春玲
罗水源
井上明久
Chaoyang Wang;Zhangyi Li;Shengli Zhu;Yanqin Liang;Zhenduo Cui;Shuilin Wu;Chunling Qin;Shuiyuan Luo;Akihisa Inoue(School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China;Tianjin Key Laboratory of Composite and Functional Materials,Tianjin 300072,China;School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;College of Chemistry Engineering and Materials Science,Quanzhou Normal University,Quanzhou 362000,China;Department of Physics,King Abdulaziz University,Jeddah 22254,Saudi Arabia)
基金
financially supported by the National Natural Science Foundation of China(51771131)
the Recruitment Program of Global Experts“1000 Talents Plan”of China(WQ20121200052)。
