Increasing carbon fiber composite strength with a nanostructured “brick-and-mortar” interphase

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Title: Increasing carbon fiber composite strength with a nanostructured “brick-and-mortar” interphase
Authors: De Luca, F
Clancy, A
Rubio Carrero, N
Anthony, DB
De Luca, H
Shaffer, M
Bismarck, A
Item Type: Journal Article
Abstract: Conventional fiber-reinforced composites suffer from the formation of critical clusters of correlated fiber breaks, leading to sudden composite failure in tension. To mitigate this problem, an optimized “brick-and-mortar” nanostructured interphase was developed, in order to absorb energy at fiber breaks and alleviate local stress concentrations whilst maintaining effective load transfer. The coating was designed to exploit crack bifurcation and platelet interlocking mechanisms known in natural nacre. However, the architecture was scaled down by an order of magnitude to allow a highly ordered conformal coating to be deposited around conventional structural carbon fibers, whilst retaining the characteristic phase proportions and aspect ratios of the natural system. Drawing on this bioinspiration, a Layer-by-Layer assembly method was used to coat multiple fibers simultaneously, providing an efficient and potentially scalable route for production. Single fiber pull out and fragmentation tests showed improved interfacial characteristics for energy absorption and plasticity. Impregnated fiber tow model composites demonstrated increases in absolute tensile strength (+15%) and strain-to-failure (+30%), as compared to composites containing conventionally sized fibers.
Issue Date: 1-Jul-2018
Date of Acceptance: 21-Mar-2018
ISSN: 2051-6355
Publisher: Royal Society of Chemistry
Start Page: 668
End Page: 674
Journal / Book Title: Materials Horizons
Volume: 5
Copyright Statement: © The Royal Society of Chemistry 2018. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: AERO/RB1527
Publication Status: Published
Online Publication Date: 2018-03-22
Appears in Collections:Faculty of Engineering
Chemical Engineering
Faculty of Natural Sciences

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