Interfacial superstructures and chemical bonding transitions at metal-ceramic interfaces

Yang, Can1; Hu, Chongze2; Xiang, Congying1; Nie, Hongbo3; Gu, Xinfu4; Xie, Lin5; He, Jiaqing5; Zhang, Wenqing5; Yu, Zhiyang1,5,6; Luo, Jian2

2021-03-01

10.1126/sciadv.abf6667

Science Advances   影响因子和分区

2375-2548

Metal-ceramic interfaces are scientifically interesting and technologically important. However, the transition of chemical bonding character from a metal to a nonoxide ceramic is not well understood. The effects of solute segregation and interfacial structural transitions are even more elusive. In this study, aberration-corrected electron microscopy is combined with atomic-resolution energy-dispersive x-ray and electron energy loss spectroscopy to investigate Ti-, V-, and Cr-segregated WC-Co interfaces as model systems. The experiments reveal the general anisotropic formation of reconstructed trilayer-like superstructures with segregant-specific compositional profiles that facilitate the transition from covalent to metallic electronic structures. Density functional theory calculations confirm the gradual increasing metallicity from WC to Co in the interfacial trilayers via increasing metallic solute concentration. This study uncovers unprecedented details of the sophisticated interfacial superstructures at metal-ceramic interfaces. It sheds light on into how a metal transits to a ceramic at a "general" interface with strong segregation.

SCI ; EI

英语

NI期刊

通讯

National Natural Science Foundation of China[51871058,51701170,"U1905214"] ; Project of Science and Technology Plan of Fujian province[2018 J01520] ; National Key Technologies R&D Program of China[2018YFA0209301]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000628616300030

AMER ASSOC ADVANCEMENT SCIENCE

20211510185800

Chemical bonds ; Chromium metallography ; Cobalt metallography ; Density functional theory ; Electron energy levels ; Electron energy loss spectroscopy ; Electron scattering ; Electronic structure ; Energy dissipation ; Metals ; Titanium metallography

Energy Losses (industrial and residential):525.4 ; Metallography:531.2 ; Physical Chemistry:801.4 ; Probability Theory:922.1

Web of Science

1.Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Fujian, Peoples R China
2.Univ Calif San Diego, Dept NanoEngn, Program Mat Sci & Engn, La Jolla, CA 92093 USA
3.Baise Univ, Sch Mat Sci & Engn, Baise 533000, Peoples R China
4.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
6.Xiamen Tungsten Co Ltd, Xiamen 361126, Fujian, Peoples R China

Yang, Can,Hu, Chongze,Xiang, Congying,et al. Interfacial superstructures and chemical bonding transitions at metal-ceramic interfaces[J]. Science Advances,2021,7(11).

Yang, Can.,Hu, Chongze.,Xiang, Congying.,Nie, Hongbo.,Gu, Xinfu.,...&Luo, Jian.(2021).Interfacial superstructures and chemical bonding transitions at metal-ceramic interfaces.Science Advances,7(11).

Yang, Can,et al."Interfacial superstructures and chemical bonding transitions at metal-ceramic interfaces".Science Advances 7.11(2021).