High-pressure cold spray (HP-CS) was used to deposit aluminum onto polyetherketoneketone (PEKK) composite substrates. Aluminum powders were sprayed using N2 and He carrier gas and a bond layer (BL) of commercial-purity Al (CP Al). Dense 7075 and CP Al deposits were achieved via combinations of BL-N2, 7075/BL-N2, and 7075/BL-He. Cold spray using 7075 Al particles or using He carrier gas yielded thinner deposits because of self-erosion and bond layer erosion. Substrate roughening was more severe when using He gas and generated more polymer debris at the deposit–substrate interface, yielding lower adhesive strength values between the deposit and the composite substrates. Adhesive strength depended on the bonding of initial particle layers that fused with the substrate.

中文翻译：

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通过冷喷涂将铝沉积到 PEKK 复合材料上

高压冷喷涂 (HP-CS) 用于将铝沉积到聚醚酮酮 (PEKK) 复合基材上。使用 N2 和 He 载气以及商业纯铝 (CP Al) 的粘合层 (BL) 喷涂铝粉。通过 BL-N2、7075/BL-N2 和 7075/BL-He 的组合实现了致密的 7075 和 CP Al 沉积物。由于自腐蚀和粘合层腐蚀，使用 7075 Al 颗粒或使用 He 载气的冷喷涂会产生更薄的沉积物。使用氦气时，基材粗糙化更严重，并在沉积物 - 基材界面处产生更多聚合物碎片，从而导致沉积物和复合基材之间的粘合强度值较低。粘合强度取决于与基材融合的初始颗粒层的粘合。