【摘要】 采用原位聚合的方法制备了高导热硼化物陶瓷颗粒（Zr/Ti）B₂填充的环氧树脂基复合材料,通过激光脉冲方法对复合材料的热导率进行测试,并利用有限元方法对其热导率进行模拟分析.实验结果表明,TiB₂/ZrB₂2种陶瓷颗粒的加入均能有效地提高环氧树脂基复合材料的热导率,且随着陶瓷颗粒填充量的增加,复合材料的热导率在一定的范围内均呈上升的趋势,相对于纯的环氧树脂,其复合材料热导的提升可分别高达100.7%和126.8%;相比之下,ZrB₂填充环氧树脂复合材料较TiB₂具有更高的热导值,分析认为这主要由于ZrB₂颗粒与环氧基体具有较低的界面热阻所致.有限元分析表明,2种复合材料热导的试验值与预测值基本吻合,且在较高体积分数下,ZrB₂复合材料热导两值的偏差较TiB₂的更小.更多还原

【Abstract】 The ceramic（Zr/Ti） B₂ particles with high thermal conductivity were introduced into epoxy matrix for the preparation of epoxy composites by in situ polymerization method. The laser ash method was taken to investigate the thermal conductivity of the epoxy composites,and a numerical analysis was applied to build up an ideal model for further discussion as well. The experimental results demonstrate that the introduction of TiB₂ and ZrB₂ particles can improve the thermal conductivity of the epoxy composites effectively. And within a certain range,the thermal conductivity of the epoxy composites was improved with the increasing content of the diboride ceramic fillers. The improvements of thermal conductivity of the epoxy composites filled with TiB₂ and ZrB₂ fillers were up to 100. 7% and 126. 8%,respectively,compared to the neat epoxy resin. Besides,the epoxy composites filled with ZrB₂ fillers show higher values of thermal conductivity than the TiB₂-filled ones,which is attributed to the lower interface resistance in the ZrB₂-epoxy system. The results of the numerical analysis exhibit that the experimental values of thermal conductivity of the epoxy composites are similar to those calculated in ideal models,where the deviations between experimental and ideal values in ZrB₂-filled epoxy composites are smaller than those in TiB₂-filled epoxy composites at high fractionlevels of the fillers.更多还原