EXTENDED ABSTRACT: Wear-related energy and material loss cost over 2500 Billion Euro per year [1]. Material scientists have long been pursuing wear-resistant alloys for saving energies. Nevertheless, metallic materials have nearimmense composition map, and traditional alloy design strategy via trial and error reveals high cost and low effeciency. Here, we present a high-throughput approach based on magentron sputtering to achieve superior wear resistance. We design a TiNbZr-Ag alloy that forms an amorphous-crystalline oxidic nanocomposite surface layer upon dry sliding. The strong (2.4 GPa yield strength) and deformable (homogeneous deformation to 20% strain) nanocomposite surface reduces the wear rate of the TiNbZr alloy by two orders of magnitude. The reactive wear protection strategy offers a pathway for designing ultrawear resistant alloys, where otherwise brittle oxides are turned to be strong and deformable for improving wear resistance [2].
Keywords：High-througput approach; magnetron sputtering; wear; alloy; strength
REFERENCES:
[1]K. Holmberg, A. Erdemir, Influence of tribology on global energy consumption, costs and emissions, Friction. 5 (2017) 263–284.
[2]C. Liu, Z. Li, W. Lu, Y. Bao, W. Xia, X. Wu, H. Zhao, B. Gault, C. Liu, M. Herbig, A. Fischer, G. Dehm, G. Wu, D. Raabe, Reactive wear protection through strong and deformable oxide nanocomposite surfaces, Nat. Commun. 12 (2021) 5518.
Professor Chang LIU holds the position at Xi'an Jiaotong University. She received her PhD degree from the City University of Hong Kong in 2017. She then worked as a postdoctoral researcher in the group of Prof. Jian Lu at the City University of Hong Kong, and later worked in Prof. Dierk Raabe’s lab at the Max Planck Institute for Iron Research. She joined the State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, in June 2022. Prof. Chang Liu has long been devoted to the research of ultra-strong and ductile alloys; specifically in the areas of alloy design through the guidance of thermodynamics, highthroughput material preparation methods, and atomic-scale strengthening and deformation mechanisms. She has published a series of papers as first/corresponding author in top journals, including Nature Communications (4), Advanced Materials, Materials Today, Advanced
Science, etc.