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应用化学镀铜方法对TiB2颗粒进行表面镀铜,采用微波烧结技术制备了含TiB2体积分数不同的TiB2/Cu复合材料,测试了试样在50~300℃区间的膨胀系数,探讨了TiB2含量及其表面改性对TiB2/Cu复合材料热膨胀系数的影响。结果表明:随着TiB2含量的增加,复合材料的膨胀系数降低;TiB2颗粒表面镀铜后,在TiB2相同含量条件下,TiB2/Cu复合材料的膨胀系数进一步降低;理论模型计算结果表明,TiB2未镀铜的TiB2/Cu复合材料的膨胀系数与ROM模型计算值相符合,而TiB2镀铜的TiB2/Cu复合材料的膨胀系数与Kerner模型计算值相符合,反映了TiB2颗粒镀铜后能很好地改善颗粒与基体的结合。
TiB2 particles were copper plated on the surface by electroless copper plating. The TiB2 / Cu composites with different volume fraction of TiB2 were prepared by microwave sintering technique. The coefficients of thermal expansion of the samples were measured in the range of 50 ~ 300 ℃. The effects of TiB2 content and Effect of Surface Modification on Thermal Expansion Coefficient of TiB2 / Cu Composites. The results show that with the increase of TiB2 content, the coefficient of thermal expansion of TiB2 / Cu composites decreases with the increase of TiB2 content. The TiB2 particles have the same Cu content, and the expansion coefficient of TiB2 / The expansion coefficient of the copper-plated TiB2 / Cu composites is consistent with the calculated value of the ROM model, while the expansion coefficient of the TiB2-coated TiB2 / Cu composites is consistent with the calculated Kerner model, reflecting that the TiB2 particles can be well plated To improve the combination of particles and matrix.