碳纤维表面沉积铜工艺及其参数影响机理研究

碳纤维增强铝基复合材料因具备碳纤维与铝的优良性能,高比强度、比模量,良好的热稳定性及性能与功能的可设计性等特点,在光机结构、航空航天结构件等方面具有广阔的应用前景。为了改善碳纤维与铝基体的界面润湿性能和抑制基体与纤维的界面反应,需要在碳纤维表面沉积铜界面层。本文通过对传统电镀装置的改进,采用了超声振荡分散的电镀装置在碳纤维表面沉积了铜界面层,通过对电镀前碳纤维的预处理、电镀液成分的优选调配,解决了碳纤维铜界面层沉积过程中因纤维束丝难以分散而出现的“夹心”问题(束丝内部纤维难以沉积或不能均匀沉积)；在此基础上,详细研究了电镀液添加剂、电镀液PH值、电镀时间等工艺参数对铜界面层的微观结构、铜界面层质量及影响机制,为制备碳纤维增强铝基复合材料提供了一定的技术支持。

Deposition of Cu on carbon fibers and influence mechanisms

Carbon fiber reinforced aluminum matrix composite is a very attractive material for the aerospace technologies. However, the poor wetting ability and the chemical reaction between the carbon fibers and aluminum make some difficulties for the fabrication of such composite. In order to improve the wetting behavior and refrain the chemical reaction, to prepare an interphase between carbon fiber and aluminum matrix is essential. In this paper, conventional electroplating equipment was improved to deposit copper interphase on the carbon fibers. It was found the improved equipment could effectively prepare a homogeneous interphase on carbon fibers with the help of plating additives. On this basis, the influence of fiber pretreatment, PH value of electroplating solution and plating time on the quality of copper interphase was investigated. The scanning electron microscopy and X-ray diffractometer were applied to characterize the interphase.