title: Tuning apparent friction coefficient by controlled patterning bulk metallic glasses surfaces.
abstract: Micro-honeycomb structures with various pitches between adjacent cells were hot-embossed on Zr35Ti30Cu8.25Be26.75bulk metallic glass surface. The effect of pitch geometry on the frictional behavior of metallic glass surface was systematically investigated. The results revealed that all textured metallic glass surfaces show a reduction in friction coefficient compared to smooth surface. More intriguingly, the friction coefficient first decreased and then increased gradually with increasing pitches. Such unique behavior can be understood fundamentally from the perspective of competing effects between contact area and local stress level with increasing pitches. This finding not only enhance the in-depth understanding of the mechanism of the significant role of surface topography on the frictional behavior of metallic glass surface, but also opens a new route towards other functional applications for bulk metallic glasses.
authors.affiliation: School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PRC.|State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PRC.
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PRC.
authors.forename: Erjiang
authors.initials: E
authors.lastname: Xu
authors.affiliation: Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan 430072, PRC.
authors.forename: Ze
authors.initials: Z
authors.lastname: Liu
authors.affiliation: School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PRC.
authors.forename: Xinyun
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PRC.
authors.forename: Lin
authors.initials: L
authors.lastname: Liu