Influence of the Low-Pressure Cold Spray Operation Parameters on Coating Properties in Metallization of Ceramic Substrates Using Copper and Aluminum Composite Powder

热喷涂技术 Pub Date : 2021-06-15 DOI:10.31399/asm.cp.itsc2021p0147

Minjae Yu, Hiroki Saito, C. Bernard, Y. Ichikawa, K. Ogawa

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引用次数: 1

Abstract

The low-pressure cold spray (LPCS) technique could be an attractive method for copper metallization of ceramic substrates to power module applications due to its one-step quick and lowtemperature process. However; manufacturing pure copper coating on a ceramic substrate by LPCS is still challenging due to its low deposition efficiency and poor adhesion strength. Our previous study successfully demonstrated the possibility of obtaining a zirconia substrate's metallization by using a feedstock powder mixture of copper and aluminum. However; the copper content in the coating was not high enough for power module applications. Therefore; in this study; we aim to improve the copper content in the coating layer composed of the composite powder deposited by LPCS on alumina and zirconia substrates. The influence of the gas pressure and standoff distance on the copper content and coating thickness are evaluated. The coating build-up with a high copper content and thickness is highly dependent on the kinetic energy of particles; enhanced by high gas pressure and short stand-off distance.

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低压冷喷涂操作参数对铜铝复合粉末陶瓷基板金属化涂层性能的影响

低压冷喷涂(LPCS)技术因其一步快速、低温的工艺而成为功率模块陶瓷基板铜金属化的一种有吸引力的方法。然而;由于LPCS沉积效率低，附着力差，在陶瓷基板上制备纯铜涂层仍然具有挑战性。我们之前的研究成功地证明了通过使用铜和铝的混合粉末来获得氧化锆衬底金属化的可能性。然而;涂层中的铜含量不够高，不适合功率模块应用。因此;在本研究中;我们的目标是提高LPCS沉积在氧化铝和氧化锆基体上的复合粉末涂层中铜的含量。评价了气体压力和隔层距离对铜含量和镀层厚度的影响。具有高铜含量和厚度的涂层的形成高度依赖于粒子的动能;气体压力高，距离短。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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热喷涂技术

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