W-Cu合金中Cu相纯度对热导的影响

来源期刊：中南大学学报(自然科学版)1999年第2期

论文作者：王志法 姜国圣 刘正春

文章页码：76 - 78

关键词：W-Cu合金;热导值;铜相纯度

Key words：W-Cu alloy; thermal conductivity; Cu phase purity

摘    要：为了探讨提高W-Cu合金热导(TC值)的途径，采用A种不同纯度的铜，用熔渗工艺制备W-15(Cu质量分数，%)复合材料试样，并用CO_２激光仪测试熔渗试样的TC值．研究发现，铜相纯度的微小变化对W-Cu合金的TC值产生重大影响．并对铜相纯度影响W-Cu合金TC值的机制进行分析和探讨．实验证明，用99.9%的铜，并用适当的熔渗工艺，可以得到TC值为200 w·m^－１·K^－１的W-15Cu合金．

Abstract: Four kinds of metal coppers with different purity were used to make W-Cu composites by infiltrating process. The thermal conductivities of the specimens were measured by laser flash technique. The experiment results show that a small variation in Cu purity has a dramatic effect on the thermal conductivity of the material. The mechanism of Cu purity's effect was analyzed. The experiments show that the thermal conductivity of 200 W·m ^-1 ·K ^-1 can be obtained for W 15Cu composite by using 99 9% pure copper and properly infiltrating process.