A maximum in ductility and fracture toughness in nanostructured Cu/Cr multilayer films
A maximum in ductility and fracture toughness in nanostructured Cu/Cr multilayer films
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纳米结构铜/铬多层薄膜具有最大的延展性和断裂韧性
DOI:
10.1016/j.scriptamat.2009.10.030
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发表时间:
2010-03
影响因子:
6
通讯作者:
Ma, E.
中科院分区:
文献类型:
--
作者:
Zhang, J. Y.;Liu, G.;Zhang, X.;Zhang, G. J.;Sun, J.;Ma, E.
In Cu/Cr multilayers with modulation period (λ) ranging from 10 to 250nm, maxima are observed for both tensile ductility and fracture at a critical λ∼50nm, different from the monotonic λ dependence known for monolithic films. This unusual behavior is explained, via quantitative assessments based on a micromechanical model, by considering the competing thickness effects on the size of the microcracks initiated in the Cr layers and on the role of the ductile Cu layer in blocking crack propagation.
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DOI:
--
发表时间:
2004-02
期刊:
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