CONSTANTIN, Loic; FAN, Lisha; ZOU, Qiming; THOMAS, Benjamin; ROGER, Jérôme; HEINTZ, Jean-Marc; DEBIEMME-CHOUVY, Catherine; MORTAINGE, Bruno; LU, Yong Feng; SILVAIN, Jean-François

doi:10.1016/j.carbon.2019.11.032

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CONSTANTIN, Loic
Department of Electrical Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

FAN, Lisha
University of Nebraska–Lincoln
Department of Electrical Engineering

ZOU, Qiming
University of Nebraska–Lincoln
Department of Electrical Engineering

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Carbon. 2020-03, vol. 158, p. 607-614

Elsevier

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The lack of robust interphases between carbon and most metals prevent the exploration of the full scope potential of carbon-based metal matrix composites. Here, we demonstrated a scalable and straightforward way to produce strong interphase between copper (Cu) and carbon fibers (CFs) by designing a tailored titanium oxide-carbide coating (TiOy-TiCx) on CFs in a molten salt process. The oxide-carbide composition in the graded layer strongly depends on the coating temperature (800–950 °C). A coating with a high TiOy content obtained at a low coating temperature (800 °C) contributes to better molten-Cu wetting and strong adhesion energy between CFs and Cu during a subsequent exposure at 1200 °C. The Cu wetting angle for the TiOy-TiCx-CF sample obtained at 800 °C was ∼80° ± 5° with a Cu surface coverage of ∼50% versus ∼115° and ∼10% for the TiCx-CF sample made at 950 °C. The kinetic analysis of the coating process step by step suggests a growth rate limited by the mass-transfer through the coated layer. This method provides a novel approach to improve the thermal conductivity of Cu/C composite for thermal management applications.< Réduire

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Carbon

carbon fibers

oxide-carbide

temperature

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Design of tailored oxide-carbide coating on carbon fibers for a robust copper/carbon interphase

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