激光加工双级结构对Al/CFRPEEK接头组织及性能的影响

doi:10.7527/S1000-6893.2020.24620

先进航空材料焊接/连接专栏

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激光加工双级结构对Al/CFRPEEK接头组织及性能的影响

徐孟嘉, 刘博生, 毕晓阳, 王振民

华南理工大学机械与汽车工程学院, 广州 510641

收稿日期:2020-08-10 修回日期:2020-09-05 发布日期:2020-10-16
通讯作者: 王振民 E-mail:wangzhm@scut.edu.cn
基金资助:
国家自然科学基金（52075185，51875212）

Effect of laser textured dual-scale structure on microstructure and mechanical property of Al/CFRPEEK joint

XU Mengjia, LIU Bosheng, BI Xiaoyang, WANG Zhenmin

School of Mechanical & Automatic Engineering, South China University of Technology, Guangzhou 510641, China

Received:2020-08-10 Revised:2020-09-05 Published:2020-10-16
Supported by:
National Natural Science Foundation of China (52075185, 51875212)

摘要/Abstract

摘要： 由于PEEK材料自然表面的极性基团较少，摩擦搭接焊方法难以直接连接碳纤维增强PEEK复合材料（CFRPEEK）和铝合金。通过表面激光加工的方法，在铝合金6061-T6表面加工微孔阵列结构，实现了CFRPEEK和6061-T6的摩擦搭接焊连接，CFRPEEK/6061-T6接头强度显著提高。结果表明，激光加工在6061-T6表面制备了微米尺度的孔阵列和纳米尺度的颗粒，形成双尺度分级结构，改变了6061-T6表面的润湿性；当6061-T6表面达到超疏水性，6061-T6与CFRPEEK之间具有更高的粘附性能和连接强度，并且6061-T6/CFRPEEK连接界面上未观察到孔洞；微尺度机械咬合是CFRPEEK与6061-T6连接的主要机制，是连接强度提高的主要原因。

关键词: 碳纤维增强PEEK复合材料, 激光表面纹理化加工, 超疏水表面, 铝合金, 摩擦搭接焊

Abstract: Non-polarity of the PEEK matrix makes it difficult to directly join metal and the carbon-fiber-reinforced-PEEK by friction lap joining. Laser surface texturing is proposed to assist the friction lap joining of the carbon-fiber-reinforced-PEEK, which is a nonpolar thermoplastic matrix, and 6061-T6 aluminum alloy, significantly enhancing the bonding strength of the carbon-fiber-reinforced-PEEK/6061-T6 joints. Results show that the laser surface texturing produces the dual-scale hierarchical structure of micro-pores and nano-particles on 6061-T6 surfaces, thereby changing the wettability of the surfaces. The superhydrophobic surface of 6061-T6 exhibits higher adhesion property with the carbon-fiber-reinforced-PEEK than the hydrophobic surface does. A flawless interface is observed in the joint of the carbon-fiber-reinforced-PEEK and 6061-T6 with the superhydrophobic surface. The micromechanical interlocking caused by micro-pores and nano-particles on 6061-T6 surfaces explains the enhancement of the bonding strength between the carbon-fiber-reinforced-PEEK and 6061-T6.

Key words: carbon-fiber-reinforced-PEEK, laser surface texturing, superhydrophobic surface, aluminum alloy, friction lap joining

中图分类号:

V261.3⁺4

徐孟嘉, 刘博生, 毕晓阳, 王振民. 激光加工双级结构对Al/CFRPEEK接头组织及性能的影响[J]. 航空学报, 2022, 43(2): 624620-624620.

XU Mengjia, LIU Bosheng, BI Xiaoyang, WANG Zhenmin. Effect of laser textured dual-scale structure on microstructure and mechanical property of Al/CFRPEEK joint[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(2): 624620-624620.

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E-mail：hkxb@buaa.edu.cn

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激光加工双级结构对Al/CFRPEEK接头组织及性能的影响

Effect of laser textured dual-scale structure on microstructure and mechanical property of Al/CFRPEEK joint

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