Magnetic and electric bulge-test instrument for the determination of coupling mechanical properties of functional free-standing films and flexible electronics.
Magnetic and electric bulge-test instrument for the determination of coupling mechanical properties of functional free-standing films and flexible electronics.
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DOI：
10.1063/1.4885037
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发表时间：
2014-06
期刊：
影响因子：
--
通讯作者：
Zejun Yu;W. Mao;Faxin Li;Xue Feng;Y. Pei;D. Fang
中科院分区：
文献类型：
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作者：
Zejun Yu;W. Mao;Faxin Li;Xue Feng;Y. Pei;D. Fang
首次提出了一种新型多场膨胀测试仪器，能够测量外磁场/电场中自支撑薄膜的双轴机械性能和电磁机械耦合效应。油压设计有两个范围，弹性小变形为0-1 MPa，塑性/损伤大变形为0-7 MPa。薄膜平面内水平且均匀的磁场由空心圆柱形磁体提供。通过调整测试薄膜的位置，幅度可以在 0 到 10,000 Oe 之间变化。同时，通过电压源(最大电压：1000V；最大电流：1A)提供施加在膜上的电场。与变形、机械载荷、磁场和电场相关的各种信号可以同时测量而不会相互干扰，这通过钛（Ti）/镍（Ni）样品在有/无外场的情况下测量的P-H曲线的一致性得到证实。观察到镍和锆钛酸铅样品在磁场/电场下的硬化现象。多场膨胀测试仪将为研究功能薄膜和柔性电子器件在耦合领域的变形机制提供有力的研究工具。
For the first time a novel multi-field bulge-test instrument which enables measurements of the biaxial mechanical properties and electro-magnetic-mechanical coupling effect of free-standing films in external magnetic/electric fields was proposed. The oil pressure was designed with two ranges, 0-1 MPa for elastic small deformation and 0-7 MPa for plastic/damage large deformation. A magnetic field that was horizontal and uniform in the film plane was supplied by a hollow cylindrical magnet. The magnitude could be changed from 0 to 10,000 Oe by adjusting the position of the testing film. Meanwhile, an electric field applied on the film was provided by a voltage source (Maximum voltage: 1000 V; Maximum current: 1 A). Various signals related to deformation, mechanical loading, magnetic field, and electric field could be measured simultaneously without mutual interference, which was confirmed by the coincidence of the measured P-H curves for titanium (Ti)/nickel (Ni) specimens with/without external fields. A hardening phenomenon under magnetic/electric fields was observed for Ni and lead zirconate titanate specimens. The multi-field bulge-test instrument will provide a powerful research tool to study the deformation mechanism of functional films and flexible electronics in the coupling field.