期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 776, 期 -, 页码 447-459出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.10.270
关键词
Metallic glass; Multilayer; Nanoscratch; Stick-slip dynamics; Nano-tribological properties
资金
- National Key R&D Program of China [2018YFB0703800]
- Natural Science Foundation of China [51801161, 51371149]
- Huo Yingdong Young Teacher Fund [151048]
- Aeronautical Science Foundation of China [2015ZF53066]
- Free Research Fund of State Key Lab. of Solidification Processing [92-QZ-2014]
- Science Fund for Distinguished Young Scholars from Shaanxi province [2018-JC007]
- Fundamental Research Funds for the Central Universities
- Initiative Postdocs Supporting Program [BX20180256]
Friction and wear are the two most important properties that determine the long-term performances of metallic glasses as much as strength and ductility. With this in mind, a multilayered strategy was proposed to improve the nano-scratching properties of metallic glass thin films and the well-characterized Zr-based metallic glasses were chosen to be the representative model materials in current work. It was found that the metallic glass could exhibit improved wear resistance and reduced friction coefficient if it is made in the form of multilayers. The complexity in the temporal scale of the lateral force signal is investigated, elucidating the inhomogeneous (and homogeneous) shear-banding processes during the nanoscratching process. The statistical and dynamic analyses of the stick-slip behaviors showed a transition from a chaotic to a self-organized critical state in the multilayers, indicating that the hetero-interfaces promote extensive shear band-interface interactions and induce the scratch hardening effect, both of which are responsible to the excellent tribological properties. The current work not only highlights the significant roles of hetero-interfaces in improving the nano-tribological properties but also make the multilayered metallic glass thin films a promising candidate towards structural and functional applications for metallic glasses. (C) 2018 Elsevier B.V. All rights reserved.
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