About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
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Presentation Title |
Shear Assisted Processing and Extrusion (ShAPETM) for Manufacturing of Copper-graphene Composites for Ultra-high Electrical Conductivity: Emphasis on Microstructural Evolution |
Author(s) |
Bharat Gwalani, Xiao Li, Woongjo Choi, Aditya Nittala, Julian Escobar, Joshua Silverstein, William Frazier, Keerti Kappagantula |
On-Site Speaker (Planned) |
Bharat Gwalani |
Abstract Scope |
Copper-graphene composites demonstrate electrical performance superior to commercial copper conductors. But bulk processing for industrial applications has been a big challenge. Recent research in friction-extruded copper-graphene composites via the Shear Assisted Processing and Extrusion (ShAPETM) shows an enhanced conductivity of ~105% IACS with very low graphene concentrations in bulk wires. However, the mechanisms for enhanced conductivity are not clearly understood. In this talk, we will present the results of a detailed investigation, using electron backscatter diffraction-based orientation microscopy, transmission electron microscopy, and atom probe tomography, of processed and semi-processed wire, used to elucidate material consolidation and microstructural changes during processing. The dispersion of graphene (graphitic domains) in the copper matrix and favorable textural alignment of copper grain are proposed to be responsible for enhanced room temperature conductivities. This understanding of process-structure-property relationships in copper composites can pave the way to further performance improvements in the next-generation energy-efficient conductor materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Extraction and Processing, Composites, Characterization |