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研究了金属间化合物厚度对蜂窝状棒材热性能和力学性能的影响。在200°C下采用重复静液挤压制备Al/Cu蜂窝状棒材。在制备过程中，Al/Cu界面生成1μm厚的金属间化合物层。经420°C退火0.5~2 h后续热处理后，可获得不同厚度的金属间化合物层，最厚可达10.1μm。经鉴定，金属间化合物层为 Al2Cu(θ)、AlCu(η2)和Al4Cu9(γ1)相。随着金属间化合物层厚度的增加，纵向和截面方向上的热导率分别减小11.9%(从(268±4.8)到(236±4.4)W/(m·K))和10.4%(从(210±3.2)到(188±2.8)W/(m·K))，Al/Cu蜂窝状棒材的抗拉强度和伸长率分别是(103±8.4) MPa和(73±6.2)%。当金属间化合物层厚度达到7.7μm时，抗拉强度增加至(131±6.5) MPa,随着金属间化合物层厚度增加至10.1μm时，抗拉强度降低至(124±3.9) MPa。随着金属间化合物层厚度增加，蜂窝状棒材的伸长率急剧下降至(29±2.5)%。

The effect of intermetallic compound (IMC) thickness on the thermal and mechanical properties of Al/Cu honeycomb rods was investigated. The Al/Cu honeycomb rods were fabricated using repeated hydrostatic extrusions at 200 °C. During the process, an IMC layer with 1μm in thickness was generated at the Al/Cu interface. Different IMC thicknesses were obtained by post-heat treatment at 420 °C for 0.5 to 2 h. The IMC thickness increased to 10.1μm. The IMC layers were identified as Al2Cu (θ), AlCu (η2), and Al4Cu9(γ1) phases. The thermal conductivities in the longitudinal direction and cross direction decreased by 11.9% ((268±4.8) to (236±4.4) W/(m·K)) and 10.4% ((210±3.2) to (188±2.8) W/(m·K)), respectively, with increasing IMC thickness. The ultimate tensile strength and elongation of the Al/Cu honeycomb rod are (103±8.4) MPa and (73±6.2)%, respectively. The ultimate tensile strength increased to (131±6.5) MPa until the IMC thickness reached 7.7μm. It subsequently decreased to (124±3.9) MPa until the IMC thickness reached 10.1μm. The elongation of the Al/Cu honeycomb rod then sharply decreased to (29±2.5)% with increasing IMC thickness.