Supermodulus effect by grain-boundary wetting in nanostructured multilayers

被引：16

作者：

Wang, Jing ^{[1
]}

Han, Lu ^{[1
]}

Li, Xiaohu ^{[2
]}

Liu, Dongguang ^{[3
]}

Luo, Laima ^{[4
]}

Huang, Yuan ^{[1
]}

Liu, Yongchang ^{[1
]}

Wang, Zumin ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300350, Peoples R China

[2] Helmholtz Zentrum Geestacht, German Engn Mat Ctr MLZ, D-85747 Garching, Germany

[3] Hefei Univ Technol, Inst Ind & Equipment Technol, Hefei 230009, Peoples R China

[4] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 65卷

关键词：

Multilayer; Elastic modulus; Grain-boundary wetting; Stress; Thermodynamic calculation; SOLID-STATE AMORPHIZATION; MECHANICAL-PROPERTIES; ELASTIC-MODULUS; THIN; HARDNESS; STRESS; GROWTH; MODEL; FILM; ENHANCEMENT;

D O I：

10.1016/j.jmst.2020.03.084

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of thermal treatments on mechanical properties was systematically investigated in Ni/Mo multilayers with a constant modulation period (160 nm) prepared by magnetron sputtering deposition. A supermodulus effect was found in the annealed multilayers as compared to the as-deposited state. A large tensile stress development was observed in the multilayers. The evolution of grain-boundary (GB) wetting was observed at the interfaces of the multilayers, which results in an enhanced modulus based on the mechanism of GB-wetting-induced interfacial stress/strain. The GB wetting phenomenon was further supported by a thermodynamic calculation. The results not only bring clear evidence of the important role of interfacial structures in governing the elastic behavior of metallic multilayers, but also allow designing the multilayers with special properties through atomic diffusion and wetting at the interfaces based on the thermodynamic calculation. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：202 / 209

页数：8

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