Al-Cu二元合金相变储热机理研究
Study on Mechanism of Phase Change Heat Storage in Al-Cu Alloy
程晓敏, 张适阔, 吴兴文
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作者单位：(武汉理工大学 材料科学与工程学院, 湖北 武汉 430070)
中文关键字：Al-Cu合金； 凝固潜热； 电子结构； EET理论
英文关键字：Al-Cu alloy; latent heat; electronic structure; EET theory
中文摘要：对3种不同成分的Al-Cu合金的储热性能进行了测试。结果表明，随Cu含量的增加，合金的凝固潜热呈下降趋势。运用EET理论对Al-Cu二元合金价电子结构进行了计算。结果表明，θ相比α相的最强键要强，两相的键能与析出量直接影响合金的凝固潜热的大小。
英文摘要：The heat storage properties of Al-Cu alloys with different composition were studied. The results show that the latent heat of the alloy decreases with the increase of copper content. The electronic structure of the alloy was calculated using empirical electron theory (EET) in solid. The strongest bonding of θ phase is stronger than that of α phase. The latent heat of solidification is directly determined by the bonding energy of two-phase and the precipitation amounts.