Anisotropic elastic-stiffness coefficients of an amorphous Ni-P film
Anisotropic elastic-stiffness coefficients of an amorphous Ni-P film
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DOI：
10.1063/1.1457542
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发表时间：
2002-04-15
影响因子：
3.2
通讯作者：
Higo, Y
中科院分区：
文献类型：
--
作者：
Ogi, H;Shimoike, G;Higo, Y
本研究提出一套完整的有效弹性刚度系数的Ni 80 P20非晶合金薄膜沉积在铝合金基板上的化学镀。膜厚度为12 μ m。的电磁声共振方法检测的三层试样（膜/基板/膜），这使我们能够确定所有五个独立的弹性刚度系数的膜使用已知的基板的弹性性能的共振频率。所得系数是横观各向同性材料的系数。在面内和法线方向之间存在强的各向异性;例如，面内杨氏模量比法线杨氏模量大34%。的各向异性系数可以解释通过考虑局部不完整的凝聚力（薄的椭圆形空隙）平行于膜表面对齐的微观力学模型。(C)2002年美国物理学会。
This study presents a complete set of effective elastic-stiffness coefficients of a Ni80P20 amorphous-alloy thin film deposited on an aluminum-alloy substrate by electroless plating. The film thickness was 12 mum. The electromagnetic-acoustic-resonance method detected resonance frequencies of the triple-layered specimens (film/substrate/film), which enabled us to determine all five independent elastic-stiffness coefficients of the film using known substrate elastic properties. The resulting coefficients were those of a transverse isotropic material. There was strong anisotropy between the in-plane and normal directions; the in-plane Young's modulus is larger than the normal Young's modulus by 34%, for example. The anisotropic coefficients can be interpreted by considering a micromechanics model for local incomplete cohesion (thin ellipsoidal voids) aligned parallel to the film surface. (C) 2002 American Institute of Physics.