Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

Zhou, Wenyan; Yi, Maozhong; Peng, Ke; Ran, Liping; Ge, Yicheng

doi:10.1016/j.matlet.2015.01.111

Cited by 49 publications

(16 citation statements)

References 17 publications

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“…Only C and Mo 2 C phase are identified from the patterns, and MC‐4 shows a slightly higher peak of C because of its higher preform density. According to our previous study, the decomposition of ammonium paramolybdate and its reduction to Mo 2 C occurred in three distinct stages. Ammonium paramolybdate decomposed to MoO 3 firstly at 595.8 K, MoO 3 was then reduced to MoO 2 at the range of 680–960 K, and subsequently carbonized to Mo 2 C at 1201.1 K. The modification process in this study should be that the MoO 3 decomposed from ammonium paramolybdate dissolved in the flux and penetrated into the preform resulting in the formation of Mo 2 C from inside.…”

Section: Resultsmentioning

confidence: 91%

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Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo₂C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

et al. 2015

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Carbon/carbon-copper(C/C-Cu) composites were fabricated by pressure-less infiltration of Cu into carbon/carbon (C/C) preforms modified with Mo 2 C interlayer by a molten salt method. Cu filled the pores inside the Mo 2 C-modified preforms fully, and retained an interconnected net-like distribution in the C/C-Cu composites. The electrical resistivity and flexural strength increased, whereas impact toughness decreased with the increase of preform density. Fiber pull-out and crack propagation along the interface contributed to the pseudo-plastic behavior of the composites. The tribological performance was improved with the increase of preform density due to the better lubrication of transfer films.

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Section: Resultsmentioning

confidence: 91%

“…According to our previous study, after infiltration of pure copper, the composites were composed of C, Cu, and Mo 2 C phases. The XRD analysis in this investigation shows similar results and will not be presented here.…”

Section: Resultsmentioning

confidence: 99%

Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo₂C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

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“…Wen Yan Zhou [43] focused his research on modifying a carbon matrix with Mo 2 C to improve the wettability between Cu and C/C. As a result, he published two related articles on this topic.…”

Section: Modification Of Carbon Matrixmentioning

confidence: 99%

“…The trend is to use as small as possible size of carbide forming elements. For example, the highest flexural strength of 254.9 MPa is possessed by the composite where the carbon preform was coated with Mo 2 C [43], the carbon preform thickness was below 1 micron and interlayer thickness was around 1 micron.…”

Section: Observed Mechanical and Physical Properties Of Cu/carbon Com...mentioning

confidence: 99%

“…C/C preforms are formed by stacking on more than one layer [39,41,45,51] and then compacted with CVI [38][39][40]45] and CVD [43,44]. The preforms are often pyrolized (P y C) thus changing the carbon structure in preforms and also affecting the resulting interface phases after the infiltration process [37].…”

Section: Observed Mechanical and Physical Properties Of Cu/carbon Com...mentioning

confidence: 99%

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Review of Recent Development in Copper/Carbon Composites Prepared by Infiltration Technique

Cantürk

Kováčik

2022

Energies

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The liquid metal infiltration of carbon preformed with copper and its alloys is already an established and well-known process. It is extensively used by the electronic industry to produce heat sinks of power electronics and electric contacts and sliding electric contacts. The advantage of the process is its ability to produce near net shape components with high volume fractions of carbon at a relatively low price. The process is carried out in a vacuum and with low applied pressure. However, a strong dependence on the temperature of infiltration and its precise control is significant for the sound final product. For certain pair carbon matrix–copper alloys, different results could be obtained according to the infiltration temperature. If the temperature is too low, the solidification may occur prior to complete infiltration (high final porosity). When the temperature is too high, undesirable reactions may occur at the fiber–matrix interface (e.g., corrosive carbides). Therefore, there are still a lot of scientific papers pushing this technology to new directions and over old limits. Publications inside scientific journals within this field deal with composite materials for sliding electrical contact and electrical contact materials, sealing materials, parts of brake disks, pantograph strips for high-speed railways, other electric and mechanical applications and even for wall surface shields in future fusion devices. The present paper reviews used carbon preforms, copper alloys, technological parameters, properties of prepared composites prepared via infiltration during the last 12 years. It can be stated that 1/3 of the papers were published within the last 3 years. Moreover, renewed interest in this low-cost technique could be expected within the next few years due to climate programs and increasing prices of the energy resources.

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Effect of Graphitization on the Microstructure and Properties of Mo₂C‐Modified C/C–Cu Composites

et al. 2015

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Carbon/carbon–copper(C/C–Cu) composites are fabricated by infiltration of Cu into Mo2C interlayer‐modified carbon/carbon(C/C) preforms. Effect of graphitization on the microstructure and properties of the C/C–Cu composites is studied. The C/C–Cu composite with graphitization shows lower electrical resistivity, thermal expansion coefficient, friction coefficient, and an obvious higher thermal conductivity due to higher graphitization degree. However, it presents lower flexural strength, impact toughness, and higher wear rate. The composite with graphitization exhibits mainly abrasive wear while that without graphitization exhibits mainly adhesion wear, and both composites show oxidation wear.

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Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

Cited by 49 publications

References 17 publications

Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo₂C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo₂C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

Review of Recent Development in Copper/Carbon Composites Prepared by Infiltration Technique

Effect of Graphitization on the Microstructure and Properties of Mo₂C‐Modified C/C–Cu Composites

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Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

Cited by 49 publications

References 17 publications

Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo2C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo2C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

Review of Recent Development in Copper/Carbon Composites Prepared by Infiltration Technique

Effect of Graphitization on the Microstructure and Properties of Mo2C‐Modified C/C–Cu Composites

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Product

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Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo₂C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

Effect of Carbon/Carbon Preform Density on the Microstructure and Properties of Mo₂C Interlayer‐Modified Carbon/Carbon–Copper Composites for Sliding Contact Materials

Effect of Graphitization on the Microstructure and Properties of Mo₂C‐Modified C/C–Cu Composites