AbstractEpoxy composites reinforced by Zirconium diboride (ZrB2) particles were investigated by finite element models (FEMs). It helped to explore the relationship between the thermal conductivity of composites and the volume fraction, size, shape, orientation, and arrangement of the ZrB2 particles. The results showed that the thermal conductivity performance of composites was improved effectively when filled with ZrB2 particles. Specifically, epoxy composites filled with 50 vol% spherical ZrB2 particles had 12.05 times the thermal conductivity of epoxy resin. At the same volume fraction, the number of ZrB2 particles in the epoxy matrix has little influence on thermal conductivity due to the dimensionless models. At a high volume fraction, rectangular ZrB2 particles improved thermal conductivity more effectively than spherical particles. In the comparison of thermal conductivities among composites reinforced by rectangular fillers, the thermal conductivities of composites were clearly affected by the length-width ratios of fillers, and this effect was monotonically increasing. The vertical orientations of particles could conduct heat most effectively compared with slant and parallel orientations. The agglomerate distribution of ZrB2 particles has the negative effect of thermal diffusion in a certain direction compared with homogeneous distribution.
Science and Engineering of Composite Materials – de Gruyter
Published: Mar 28, 2018
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