Buckling behaviors and adhesion energy of nanostructured Cu/X (X = Nb, Zr) multilayer films on a compliant substrate
Buckling behaviors and adhesion energy of nanostructured Cu/X (X = Nb, Zr) multilayer films on a compliant substrate
复制标题
柔顺基材上纳米结构 Cu/X (X = Nb, Zr) 多层薄膜的屈曲行为和粘附能
DOI：
10.1016/j.actamat.2013.09.028
复制
发表时间：
2013-12
期刊：
影响因子：
9.4
通讯作者：
Sun, J.
中科院分区：
文献类型：
--
作者：
Zhang, P.;Cheng, P. M.;Zhang, G. J.;Sun, J.
Two sets of Cu/Nb (face-centered cubic (fcc)/body-centered cubic) and Cu/Zr (fcc/hexagonal close-packed) nanostructured multilayer films (NMFs) have been prepared on a flexible polyimide substrate, with a wide range modulation period (λ) from 250 down to 5 nm. The mechanical properties of the two NMFs have been measured upon uniaxial tensile testing and the buckling behaviors have been systematically investigated as a function ofλ. A significant difference in the bucking behaviors was found between the two NMFs, with the buckles in the Cu/Nb NMF being mostly cracked, while the buckles were nearly crack-free in the Cu/Zr NMF. The different buckling behaviors, dependent on the constituent phases, are rationalized in the light of the disparity in mechanical properties. The criteria to characterize buckle cracking have been discussed with respect to the mechanical properties (e.g. yield strength, ductility and fracture toughness) of the NMFs. A modified energy balance model has been employed to estimate the adhesion energy of the NMFs on the polyimide substrate. Within theλregime below a critical size (λcrit) of ∼50 nm aλ-independent adhesion energy of about 1.1 and 1.2 J m−2has been determined for the Cu/Nb and Cu/Zr NMFs, respectively, which agrees well with previous reports on the metal film/polymer substrate systems. Within theλregime greater thanλcrit, however, the measured adhesion energy exhibit a strong size effect, i.e. increasing with increasingλ. Theλdependence of the evaluated adhesion energy is discussed in terms of the size-dependent deformation mechanism in NMFs. A micromechanics model has been utilized to quantify the critical modulation period of ∼50 nm, where the deformation mechanism changes from dislocation pile-up to confined layer slip.
登录
查看更多内容
纳米结构铜/铬多层薄膜具有最大的延展性和断裂韧性
影响因子：
6
作者：
Zhang, J. Y.;Liu, G.;Zhang, X.;Zhang, G. J.;Sun, J.;Ma, E.
通讯作者：
Ma, E.
影响因子：
8.6
作者：
J. Colin;C. Coupeau;J. Grilhé
通讯作者：
J. Colin;C. Coupeau;J. Grilhé
了解多层金属复合材料裂纹尖端的纳米级损伤
影响因子：
4
作者：
通讯作者：
--
纳米结构 Cu/X (X = Cr, Zr) 多层薄膜中尺寸相关的变形机制和应变率敏感性
影响因子：
9.4
作者：
Niu, J. J.;Zhang, J. Y.;Liu, G.;Zhang, P.;Lei, S. Y.;Zhang, G. J.;Sun, J.
通讯作者：
Sun, J.
DOI：
10.1002/(sici)1099-0488(19970715)35:9
发表时间：
1997-07
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
Shouke Yan;J. Petermann;Decai Yang
通讯作者：
Shouke Yan;J. Petermann;Decai Yang