In this study, a double-scale composite microgroove wick (DCMW) fabricated using crisscross plough-extrusion (CPE) method and subsequent chemical corrosion surface treatment is proposed for improving the heat transfer performance of copper‑aluminum composite vapor chambers (CACVCs). The wicking capability of a DCMW was characterized using a capillary rise experiment with ethanol as the working fluid. The wicking rise process was recorded using an infrared thermal imager, and the surface morphology and surface wettability of the DCMW were investigated. The effect of corrosion time on the wicking capability of the DCMW was also studied. The experimental results indicated that the equilibrium wicking height of the DCMW was significantly higher than that of an uncorroded microgroove wick. The optimal corrosion time was determined to be 15 min. DCMW with the optimal treatment exhibits a capillary performance parameter ($\frac{K}{R_{\mathrm{eff}}}$) of 3.81 μm and volumetric flow rate of 3.64 mm³/s, an increase of 442% and 127.5% relative to that of an uncorroded microgroove wick, respectively. Furthermore, the results indicated that the combination of the CPE process and chemical corrosion provides a simple and effective method for improving the wicking capabilities of the wicks and the thermal performances of CACVCs.

在这项研究中，提出了一种使用纵横犁挤压（CPE）方法和随后的化学腐蚀表面处理制造的双尺度复合微槽灯芯（DCMW），以提高铜铝复合均热板（CACVC）的传热性能。使用乙醇作为工作流体的毛细管上升实验表征 DCMW 的芯吸能力。使用红外热像仪记录芯吸上升过程，并研究 DCMW 的表面形态和表面润湿性。还研究了腐蚀时间对 DCMW 芯吸能力的影响。实验结果表明，DCMW 的平衡芯吸高度明显高于未腐蚀的微槽芯吸高度。最佳腐蚀时间确定为 15 分钟。$\frac{钾}{{\mathrm{电阻}}_{\mathrm{效果}}}$) 为 3.81 μm，体积流速为 3.64 mm ³ /s，相对于未腐蚀的微槽灯芯，分别增加了 442% 和 127.5%。此外，结果表明 CPE 工艺和化学腐蚀的结合为提高吸液芯的芯吸能力和 CACVC 的热性能提供了一种简单有效的方法。