Cu/FeNi系复合材料的热膨胀性能

THERMAL EXPANSION PROPERTIES OF Cu/FeNi COMPOSITE

在实验的基础上研究了低膨胀高导热Ｃｕ／ＦｅＮｉ粉末冶金复合材料膨胀性能的影响因素。实验表明，随着Ｃｕ含量增加、烧结温度升高、轧制率减小，材料的膨胀系数增加；而ＦｅＮｉ粒度对材料膨胀系数的影响较复杂。这是由ＦｅＮｉ和Ｃｕ之间的相互配比、相互扩散、ＦｅＮｉ合金的特别性质以及ＦｅＮｉ、Ｃｕ在复合材料中的分布状态共同决定的。

On the basis of experiments, the affecting factors of the thermal expansion coefficient of low thermal expansion, high thermal conductivity composite Cu/FeNi made by powder metallurgy have been investigated. The experimental results show that, the thermal expansion of this material increases with the increase of rolling ratio, while the effect of the size of FeNi on it is more complicated. It is considered that, all properties above are determined by the ratio of Cu content to FeNi content, the diffusion between FeNi and Cu, the special properties of FeNi and the distrubution of FeNi and Cu in this composite.