Thermal Conductivity Carbon Fiber Laminate

On the one hand these carbonaceous fillers possess high thermal conductivity which act as functional component to enhance the thermal conductivity of composite laminate.

Thermal conductivity carbon fiber laminate. Emissivity and thermal conductivity of carbon fiber epoxy laminates were characterized beforehand. However the thermal conductivities of these cfrp materials are generally poor due to low axial thermal conductivity of pan based carbon fiber which greatly limits their application in the satellite structure panels. Starting with thermal conductivity components for the individual continuous unidirectional fiber reinforced lamina or ply a method has been developed to determine global conductivities in a laminated carbon carbon composite. Assuming that all laminae are identical in thickness and in fiber content effective thermal conductivity in each global direction is determined for the laminated composite.

The thermal conductivity of a sample with laminate plys in the configuration 45 90 0 3 90 45 has also been measured. Infrared image analysis was used to determine the emissivity of the composite. For the multidirectional sample the thermal conductivity ranges from 0 22 w mk at 5 7 k to 2 98 w mk. On the other hand these fillers may bridge continuous carbon fiber reinforcements to transfer heat more effectively or directly form continuous through thickness conductive network.

The in plane thermal conductivity of cfrp is expected to attain to 120 w m k thermal conductivity of 2024 t3 aluminum alloys is about 120 w m k in the satellite structure. Incorporating multi walled carbon nanotubes into cfrp composites is more advantageous for improving electrical conductivity whereas incorporating gnps is more beneficial for enhancing thermal conductivity. T700 and m55j are the most common carbon fiber types.