Abstract
In the paper results of heat propagation at original stages of heating of unidirectional copper-carbon fibre (Cu-CF) composite materials in dependence on volume amount of fibres in composite and on the direction of heat propagation concerning the fibre arrangement are summarised. Samples of Cu-CF composites containing 40, 52 and 63 vol.% fibres as well as pure aluminium and copper were heated in central region and the dependence of temperature on heating time in various places of the specimen was fixed. An increase of fibre amount in composite results in a decrease of its thermal conductivity which is manifested in the increase of the growth rate of temperature in composite. From the obtained dependences of heat propagation it follows that in unidirectional composites the heat propagates easier in the direction of fibres, and thus more expressive differences can be obtained in composite containing more than 50 vol.% of fibres.

Key words
composite material, copper matrix, carbon fibre, heat transfer

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