高压烧结镀Cr、Ti膜金刚石/铜复合材料热导率研究

 采用磁控溅射方法，在金刚石表面镀覆活性金属Cr膜和Ti膜，在高温高压下合成了镀活性金属膜金刚石/铜复合材料。实验发现，活性金属的加入增强了金刚石与铜界面间的结合强度，减少了界面热阻，提高了复合材料的热导率。复合材料热导率随着金刚石体积分数的增加而降低，随着金刚石的粒度增大而提高。这主要是由界面热阻引起的，可以通过增大金刚石粒度和改善界面状态来提高复合材料热导率。

Research on Thermal Conductivity of Diamond with Cr,Ti Coating/Copper Composite Materials by Sintering under High Pressure

Cr or Ti is coated on diamond surface by magnetron sputtering,and diamond with active metal coating/copper composite materials is sintered under high temperature and high pressure.The experimental results show that the introduction of active metals enhances the bond strength between diamond and copper,reduces the thermal boundary resistance and improves the thermal conductivity of diamond/copper composite materials.In addition,the experiments indicate that the thermalconductivity of the composites decreases with increasing diamond content and the reducing grain size of diamond.This phenomenon is attributed to the thermal boundary-resistance.The thermal conductivity of diamond/copper composite materials can be increased by increasing the grain size of diamond and improving the interface of diamond and copper.