| LIU Bin,XIE Lan-sheng,CHEN Ming-he.Effects of Surface Morphology on Adhesive Bonding Properties of TB8 Titanium Alloy/Epoxy Resin[J],51(6):382-389 |
| Effects of Surface Morphology on Adhesive Bonding Properties of TB8 Titanium Alloy/Epoxy Resin |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.06.037 |
| KeyWord:TB8 titanium alloy plasma etching surface morphology chemical composition wettability adhesive bonding properties |
| Author | Institution |
| LIU Bin |
Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| XIE Lan-sheng |
Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| CHEN Ming-he |
Nanjing University of Aeronautics and Astronautics, Nanjing , China |
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| Abstract: |
| The work aims to improve the bonding strength between the epoxy resin and the titanium alloy by constructing different microstructures on the substrate surface. The plasma etching equipment was used to treat the TB8 titanium alloy samples by adjusting the gas flow rate, treatment time and RF power, and single-lap joints were prepared for the treated samples. The surface morphology of samples before and after plasma etching was studied by the scanning electron microscopy (SEM), the chemical composition changes of the sample surface before and after etching was analyzed by XPS, the wettability of the sample surface was characterized by the water contact angle, and the plasma etching treatment was carried out by electronic universal testing machine. The bond strength between the plasma-etched samples and epoxy resin was studied by electronic universal testing machine. When the samples were etched by CF4 plasma chemical etching, different types of surface microstructure were formed on the substrate surface at different etching time. The spherical granular structure had better surface bonding performance than the honey comb structure. When the samples were etched by plasma sputtering with Ar, nanoscale micro-pit structure was formed on the surface of the samples. The surface of titanium alloy was cleaner and its activity was enhanced after plasma etching. After plasma etching, the water contact angle was reduced to 0°, which indicated the wettability was improved significantly. Before plasma etching, the bonding strength between the samples and epoxy resin was 5.32 MPa; after plasma etching, the bond strength between the samples and epoxy resin was 23.25 MPa; and after sand blasting and plasma etching, the bond strength between the samples and epoxy resin was up to 30.29 MPa. The optimal plasma etching processing parameters were RF power 540 W, gas flow 120 mL/min, and treating time 50 min respectively. The optimal parameters of plasma etching after sandblasting are RF power 540 W, gas flow 120 mL/min and treatment time 40 min respectively. The Plasma etching treatment can significantly improve the adhesive bonding properties of TB8 titanium alloy, and the effect is better when combined with the sandblasting. |
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