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采用原位聚合的方法制备了高导热硼化物陶瓷颗粒(Zr/Ti)B_2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,TiB_2/ZrB_22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,ZrB_2填充环氧树脂复合材料较TiB_2具有更高的热导值,分析认为这主要由于ZrB_2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,ZrB_2复合材料热导两值的偏差较TiB_2的更小.
The in-situ polymerization method was used to prepare epoxy resin-based composites filled with high thermal conductivity boride ceramic particles (Zr / Ti) B_2. The thermal conductivity of the composites was tested by laser pulse method. Thermal conductivity.The results show that the addition of TiB_2 / ZrB_22 ceramic particles can effectively improve the thermal conductivity of the epoxy resin matrix composites, and with the increase of the amount of ceramic particles, the thermal conductivity of the composite Compared with the pure epoxy resin, the thermal conductivity of the composites can be as high as 100.7% and 126.8%, respectively; in contrast, ZrB_2-filled epoxy resin composites are more effective than TiB_2 Which is mainly due to the lower thermal interface resistance between ZrB 2 particles and the epoxy matrix.The finite element analysis shows that the experimental values of the two kinds of composites are in good agreement with the predicted values and At higher volume fraction, the thermal conductivity of the ZrB 2 composite deviates less than TiB 2.