Metal Surface Nanopatterning for Enhanced Interfacial Adhesion in Fiber Metal Laminates

Jing Ye, Huan Wang, Jiale Dong, Cheng Liu, Yan Gao, Bowen Gong, Bo Su, Hua-Xin Peng*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

A nano-scale electrochemical sculpture (denoted here as NES) method has been developed to create TiO2 nanotube arrays on the surface of titanium sheets for improved bonding between titanium and carbon fiber reinforced epoxy composite laminates. For comparison, other surface treatments including anodization in NaOH, Na2SiO3, Na2C4H4O6 and EDTA electrolyte (denoted as NaTESi) and electrochemical etching in alkali solution (denoted as ALK) were carried out to investigate their effects on the surface morphology, wettability and the shear strength between titanium sheets and epoxy resin. The results from single-lap tests showed that the apparent shear strengths between titanium sheet and epoxy with NaTESi, ALK and optimized NES treatments have been improved by 37.2 %, 53.9 %, and 70.9 %, respectively, in comparison with that of non-treated pristine samples. The samples in single-lap tests showed a mixture mode of cohesive and interfacial failures where the interfacial failure occurred at the epoxy/metal-oxide interface and the oxide films formed during the surface treatments remained intact. Utilizing the treated titanium sheets, fiber metal laminates (FMLs) were fabricated and their interlaminar shear strengths (ILSS) were found to increase by 43.5 %, 56.1 %, and 75.0 %, respectively, compared to pristine samples, showing the promise of the nano-patterning technique
Original languageEnglish
Article number108651
Number of pages7
JournalComposites Science and Technology
Volume205
DOIs
Publication statusPublished - 22 Mar 2021

Bibliographical note

Funding Information:
HXP acknowledges the financial support from the National Natural Science Foundation of China under grant number 51731009 . BS and HXP acknowledge the support through ZJU's Overseas Academician Joint Lab for Advanced Composite Materials and Structures.

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Surface Treatments
  • Apparent shear strength
  • Ti02 nanotube arrays
  • Fiber metal laminates
  • interlaminar shear strength

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