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采用霍尔源放电等离子体对碳纤维/树脂复合材料表面进行活化,通过直流磁控溅射技术在其表面沉积Al涂层。利用红外光谱、X射线衍射和扫描电子显微镜分析基体表面极性和涂层组织结构,自行设计垂直拉伸装置测定涂层与基体间的结合强度,并探究不同活化功率和活化前后不同涂层厚度对膜基结合强度的影响。研究结果表明,制备涂层为纯净的多晶态Al膜,表现为(111)方向择优取向生长。等离子体活化后,基体表面极性增强,膜基结合强度显著上升,且随活化功率的增大先上升再降低,在功率为300 W时最佳。同时活化后膜基结合强度随涂层厚度增加而降低的趋势减弱,在涂层厚度达到25μm时,膜基结合强度仍较大,为2.88 MPa,而未经等离子体活化时仅为1.22 MPa。
The surface of carbon fiber / resin composite was activated by Hall-source discharge plasma, and the Al coating was deposited on the surface by DC magnetron sputtering. The polarities of the surface of the substrate and the microstructure of the coating were analyzed by infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The vertical tensile device was designed to measure the bonding strength between the coating and the substrate. The effects of different activation powers and coating thickness before and after activation On the film-based bonding strength. The results show that the coating is pure polycrystalline Al film, the performance of the (111) direction preferred orientation growth. After the activation of the plasma, the surface polarity of the substrate is enhanced, the bonding strength of the film base is significantly increased, and then increases and then decreases with the increase of the activation power, which is best at the power of 300W. When the coating thickness reaches 25μm, the bonding strength of the film base is still 2.88 MPa, which is only 1.22 MPa when the thickness of the film is not activated by plasma.