The effect of nacre-inspired coating on the compression behaviour of carbon fibre composite
Author(s)
Gogoi, R
Anthony, DB
Eichhorn, SJ
Shaffer, MSP
Type
Conference Paper
Abstract
The failure mechanism of unidirectional fibre-reinforced polymers in compression is complex and relates to a progression of failure from fibre micro buckling upwards across multiple coupled length scales. The initial fibre instability relates to the shear properties of the matrix and the alignment (or waviness) of the fibre. The initiation may also be affected by local composition/fibre volume fractions, matrix defects (for instance voids), or geometric features of the specimen/component. The use of surface-modified carbon fibres could improve the longitudinal compressive performance of composites by suppressing or delaying the formation of kink bands. A nanostructured hierarchical coating inspired by the brick-and-mortar structure of natural nacre was deposited around each individual fibre in a tow. The nanostructured coating contains layered-double-hydroxide (LDH) platelets which are attached to the carbon fibre surface using a layer-by-layer deposition technique. LDH platelets were selected for their tuneable geometry and high surface charge density. Successful preparation of LDH platelets with an aspect ratio of 8 was confirmed by X-ray diffraction and transmission electron microscopy. The quality of the conformal LDH monolayer coating was assessed by scanning electron microscopy and preliminary results show the formation of a well-ordered LDH multi-layer coating. These coated fibre tows will be converted to unidirectional epoxy-matrix composites and tested in compression in future studies.
Date Issued
2023-07-30
Date Acceptance
2023-05-05
Citation
ICCM International Conferences on Composite Materials, 2023
Publisher
Queen's University Belfast
Journal / Book Title
ICCM International Conferences on Composite Materials
Copyright Statement
© 2023 The Author(s).
Identifier
10.1002/cepa.
Source
Twenty-third International Conference on Composite Materials [ICCM23]
Subjects
Additive manufacturing
Cylindrical shells
Digital image correlation (DIC)
Microstructure
Laser scanning
Powder bed fusion (PBF)
Stainless steel
Compression tests
Tensile coupon tests
3D printing
Publication Status
Published
Start Date
2023-07-30
Finish Date
2023-08-04
Coverage Spatial
Belfast, UK
Date Publish Online
2024-02-13