Microstructure and Thermal Expansion of Hybrid - Copper Alloy Composites Reinforced with both Tungsten and Carbon Fibres

Abstract:

Tungsten as refractory material and high thermal conductive carbon fibres are promising candidates for production of copper matrix composites for high temperature applications. Three types of rod-like samples were prepared by gas pressure infiltration of different carbon/tungsten fibre preforms with copper and/or copper alloy (Cu-0.5Cr) respectively. The fibres are aligned parallel to rod axis and were combined with the tungsten wire cloth. The microstructure of prepared hybrid composites was examined. The samples were thermally cycled 3 times up to 550 °C at a relatively high heating/cooling rate (10 K/min) to touch real condition in applications where high heat is formed during short time. The thermal expansion behaviour in radial direction was also analysed. Results show that a combination of both types of reinforcements in rod-shapes samples insures good protection against composite disintegration during high temperature thermal loading.

• Periodical: Materials Science Forum (Volume 782)
• Pages: 513-518
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.782.513
• Online since: April 2014
• Authors: Juraj Koráb*, Štefan Kavecký, Pavol Štefánik, Karol Iždinský, František Simančík, Tomáš Dvorák
• Keywords: Carbon Fiber (CF), Composite, Copper, Microstructure, Thermal Expansion, Tungsten Wire Cloth

References

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DOI: 10.4028/www.scientific.net/msf.782.519