Effect of titanium on copper–titanium/carbon nanofibre composite materials

Lloyd, J.C.; Neubauer, Erich; Bárcena, J.; Clegg, W.J.

doi:10.1016/j.compscitech.2010.05.002

Cited by 37 publications

(6 citation statements)

References 18 publications

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“…In the case of sintering of the Ti 25 Cu 75 ribbons in contact with graphite, no evidence of diffusion of carbon through layers of the alloy was detected. This result is in agreement with observations reported by Lloyd et al [31], who obtained Cu–Ti/carbon fiber composites by hot pressing Cu-coated nanofibers mixed with a Ti powder and found TiC layers covering some carbon fibers. The transport of titanium to carbon was by means of diffusion of the former through the copper layers.…”

Section: Resultssupporting

confidence: 93%

Interaction of a Ti–Cu Alloy with Carbon: Synthesis of Composites and Model Experiments

et al. 2019

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Titanium carbide (TiC), is the most thermodynamically stable compound in the Ti–C–Cu system, which makes it a suitable reinforcement phase for copper matrix composites. In this work, the interaction of a Ti–Cu alloy with different forms of carbon was investigated to trace the structural evolution leading to the formation of in-situ TiC–Cu composite structures. The reaction mixtures were prepared from Ti25Cu75 alloy ribbons and carbon black or nanodiamonds to test the possibilities of obtaining fine particles of TiC using ball milling and Spark Plasma Sintering (SPS). It was found that the behavior of the reaction mixtures during ball milling depends on the nature of the carbon source. Model experiments were conducted to observe the outcomes of the diffusion processes at the alloy/carbon interface. It was found that titanium atoms diffuse to the alloy/graphite interface and react with carbon forming a titanium carbide layer, but carbon does not diffuse into the alloy. The diffusion experiments as well as the synthesis by ball milling and SPS indicated that the distribution of TiC particles in the composite structures obtained via reactive solid-state processing of Ti25Cu75+C follows the distribution of carbon particles in the reaction mixtures. This justifies the use of carbon sources that have fine particles to prepare the reaction mixtures as well as efficient dispersion of the carbon component in the alloy–carbon mixture when the goal is to synthesize fine particles of TiC in the copper matrix.

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Section: Resultssupporting

confidence: 93%

Interaction of a Ti–Cu Alloy with Carbon: Synthesis of Composites and Model Experiments

et al. 2019

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“…It is reported that the basal plane TC of natural GF is over 1000 Wm À1 ÁK À1 , which is about two orders of magnitude higher than the c direction (perpendicular to the basal plane of GF). 23 Therefore, in order to obtain high TC, it is necessary to fabricate composites in which the GFs orientate preferably. The GF/copper composites with the volume fraction of GF ranging from 20% to 70% were fabricated by the optimal process, i.e.…”

Section: Composite Microstructurementioning

confidence: 99%

Fabrication and thermo-physical properties of graphite flake/copper composites

Zhang

Liu

et al. 2014

Journal of Composite Materials

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This study focuses on the fabrication of thermal management material for power electronics applications using graphite flake reinforced copper composites. The effects of mixing, die-filling, and particle size of copper on microstructure and thermal conductivity of the composites were investigated. The results indicate that the process, especially die-filling, affects the distribution and orientation of graphite flake and then affects the relative density and thermal conductivity of the composites. The graphite flake/copper composites with 20–50 vol. % flakes have relatively high density of over 98%. The composites show a strong anisotropy in thermal conductivity and have a value of 528 W·m−1·K−1 with 40 vol. % graphite flakes at room temperature in the direction perpendicular to the pressing direction, which exhibit excellent thermo-physical properties to meet the heat dispersion and matching requirements of power electronic devices to the packaging materials.

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“…In a CNX reinforced composite it has to be ensured that there are still CNXs present in the final composite. When bringing CNXs together with a matrix metal under high temperatures/pressures, this might also result in a modification, amorphisation or complete degradation of the CNX material [37], especially when additives are involved in a surface modification process. …”

Section: Conclusion and Remarksmentioning

confidence: 99%

Potential and challenges of metal-matrix-composites reinforced with carbon nanofibers and carbon nanotubes

Neubauer¹,

Kitzmantel²,

Hulman³

et al. 2010

Composites Science and Technology

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183

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To cite this version:E. Neubauer, M. Kitzmantel, M. Hulman, P. Angerer. Potential and challenges of metal-matrixcomposites reinforced with carbon nanofibers and carbon nanotubes. Composites Science and Technology, Elsevier, 2010, 70 (16) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractWith a continuous improvement of the production techniques for carbon nanofibers and carbon nanotubes along with an improvement of the available qualities of the materials, these reinforcements have been introduced into polymers, ceramics and metals. While in the field of polymers first success stories have been published on carbon nanofiller reinforcements, up to now metals containing these types of nanofillers are still a topic of intensive research. Basically a similar situation were found in those days, when micron sized carbon fibers came on the market. Today many applications of carbon fiber reinforced composites are existing, while metals reinforced with conventional carbon fibers are still only found in niche applications.Several reasons can be identified, why the introduction of carbon based nanofillers (nanofibers/nanotubes) into metallic matrices is a difficult task. Nevertheless it is worthwhile to carry out systematic studies in this field due to the excellent and promising thermal, electrical, mechanical or tribological properties of the nanofillers.This paper gives an overview and summarises the activities related to carbon nanotubes and nanofibers used as a reinforcement in metallic matrix materials. The main challenges and the potential with respect to material properties will be discussed. 1) IntroductionWithin the past years there was a significant increase on publications related to carbon nanofiber (CNF) and carbon nanotube (CNT) reinforced composites. Most of these publications are related to polymer based composites. Up to now there has been a limited number of publications and especially of success stories, where CNTs or CNFs have been successfully introduced in metallic or ceramic matrix materials resulting in significant improvements of the properties of the matrix material. This situation is similar to those several decades ago, when micron sized carbon fibers were already used in commercial applications in polymers while the successful introduction of carbon fibers in metal matrix composites took several additional years before showing first success. The reason why polymer based matrix composites resulted in a faster success compared to metal based ones, is of course related to the fact that a polymer matrix is in general characterised by a rather poor thermal, mechanical, electrical or...

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Effect of titanium on copper–titanium/carbon nanofibre composite materials

Cited by 37 publications

References 18 publications

Interaction of a Ti–Cu Alloy with Carbon: Synthesis of Composites and Model Experiments

Interaction of a Ti–Cu Alloy with Carbon: Synthesis of Composites and Model Experiments

Fabrication and thermo-physical properties of graphite flake/copper composites

Potential and challenges of metal-matrix-composites reinforced with carbon nanofibers and carbon nanotubes

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