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Comment Heat Transfer

This carbon-fiber composite material is good at dissipating heat

By Gerald Ondrey |

A technology that increases the heat-dissipating properties of carbon-fiber-reinforced plastic (CFRP) to that of metals has been developed by Toray Industries, Inc. (Tokyo, Japan; www.toray.com). Applying this technology to CFRP dissipates heat effectively from their sources through thermal conduction paths inside that material. This can help suppress battery degradation in mobility applications while boosting performance in electronic device applications, says the company. CFRP is less thermally conductive than aluminum alloys and other metals. This has prompted efforts to enhance heat dissipation by employing external or internal graphite sheets offering excellent thermal conductivity and heat dissipation and diffusion. However, these sheets are easy to fracture, scatter and damage, which compromises the performance of CFRP. Toray has created a heat-conductive layer employing a porous CFRP support that safeguards the graphite sheets (diagram). Laminating CFRP prepreg on this thermally conductive layer enabled Toray to attain a thermal conductivity above that of metals, which would be impossible with regular CFRP, without compromising the mechanical properties and quality of that material. Prepreg is a sheet-like intermediate material…
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