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Dec 8 – 10, 2020 Online only
Online event
Europe/Berlin timezone

Localized strain induced abnormal growth of cube oriented grain in a graphene nanosheets (GNS) reinforced copper matrix composite

Dec 9, 2020, 2:30 PM
3h 30m
Online event

Online event

Speaker

Hailong Shi

Description

Graphene nanosheets (GNS) reinforced copper (Cu) matrix composites were fabricated through electrophoretic deposition (EPD) and vacuum hot-pressing sintering process. The bulk texture of the as-sintered pure Cu and the GNS/Cu shows that a strong cube component formed in the GNS/Cu, while the pure Cu sintered with the same method exhibits coarse grains with random orientations. Thereafter, the evolution of microstructure and texture during sintering were characterized by SEM-EBSD and neutron diffraction ex-situ, and the macro and local strain of Cu during the sintering process was investigated in-situ using a dilatometer at high energy synchrotron radiation source at HEMS, DESY. The primary results indicate that the micro strain in the GNS/Cu which contributed by the thermal expansion mismatch between GNS and Cu during sintering can enhance the growth of the cube oriented grains, which finally lead to a strong cube texture inside the GNS/Cu composite.

Primary author

Co-authors

Claude Esling (LEM3 UMR 7239 CNRS, Université de Lorraine) Weimin Gan (Helmholtz-Zentrum Geesthacht) Yudong Zhang (LEM3 UMR 7239 CNRS, Université de Lorraine)

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