Nanoscale tunable reduction of interfacial friction on nano-patterned wear-resistant bulk metallic glass

Guo, Dengji; Chen, Xinchun; Zhang, Chenhui; Wu, Xiaoyu; Liu, Zhiyuan; Li, Kunluo; Zhang, Jun; Wang, Chenxue

doi:10.1016/j.apsusc.2018.05.095

Cited by 6 publications

(1 citation statement)

References 57 publications

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“…Metallic glasses (MGs) exhibit a unique combination of mechanical properties 3 : high hardness, high yield strength, large elastic deformation 4 and high fracture toughness 5 . They have high macroscopic 6 , 7 , micro- 8 and nano-scale 9 , 10 wear resistance, which is further improved by surface oxides 11 , 12 . Owing to their high wear resistance 9 , 13 , good surface quality 14 and absence of granular structure, MGs are applicable in micro-electro-mechanical devices 15 , 16 in which the mechanical contact area between the component surfaces ranges from micrometer to sub-micrometer scale.…”

Section: Introductionmentioning

confidence: 99%

Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature

Louzguine‐Luzgin

Trifonov

Ivanov

et al. 2021

Sci Rep

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Shear-induced segregation, by particle size, is known in the flow of colloids and granular media, but is unexpected at the atomic level in the deformation of solid materials, especially at room temperature. In nanoscale wear tests of an Fe-based bulk metallic glass at room temperature, without significant surface heating, we find that intense shear localization under a scanned indenter tip can induce strong segregation of a dilute large-atom solute (Y) to planar regions that then crystallize as a Y-rich solid solution. There is stiffening of the material, and the underlying chemical and structural effects are characterized by transmission electron microscopy. The key influence of the soft Fe–Y interatomic interaction is investigated by ab-initio calculation. The driving force for the induced segregation, and its mechanisms, are considered by comparison with effects in other sheared media.

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