放电等离子烧结制备Diamond/Al复合材料

采用放电等离子烧结法（SPS）制备了Diamond/Al复合材料，研究了金刚石粒径、成分配比、工艺参数等对复合材料的导热性能的影响。结果表明，SPS可以得到导热性能较好的Diamond/Al复合材料，致密度是影响该材料导热性能的最重要因素。在实验确定的金刚石体积分数50%，金刚石粒径70 μm，温度550℃、压力30 MPa的工艺条件下，所制备的材料致密度较高，热导率为182 W/(m·K)，比相同条件下纯铝粉烧结体的热导率提高了34.8%，表明金刚石的添加对烧结铝基材料导热性能有明显的改善作用。 

Diamond/Al composites fabricated by spark plasma sintering

Diamond/Al composites were fabricated by spark plasma sintering（SPS）. The thermal conductivity of the samples with different particle volumes and particle sizes was investigated，and the influence of the processing parameters on the thermal conductivity of the composites was also considered. The results show that diamond/Al composites with good thermal conductivity can be made by SPS，and the density is the most important factor which affects the thermal conductivity of the composites. The diamond/Al composite with the highest thermal conductivity can be obtained when the composite contains  50 vol% diamond particles of 70 μm sintered at 550℃，and its thermal conductivity is 182 W/(m·K)，which is 34.8% higher than that of the sample of the pure Al sintered under the same condition，showing that the diamond particle gives significant improvement of the thermal conductivity of Al matrix composites.