The determination of carbon fibre bundle sizes by electrochemical impedance spectroscopy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Colleges, School and Institutes


Electrochemical Impedance Spectroscopy (EIS) has been used to measure the diameter of single carbon fibres to within 3% of the actual value measured by Scanning Electron Microscopy (SEM). The precision of the technique developed also allows for the accurate determination of the number of fibres present in a carbon fibre bundle, such data are important for the calculation of fibre tensile strength from the tensile force applied to carbon fibre bundles. The impedance of a single carbon fibre and carbon fibre bundles of up to 20 fibres have been measured, with results showing good agreement with theoretical values. The impedance of multiple lengths of carbon fibres ranging from 80-300 mm has also been studied, with the impedance being directly proportional to the fibre length, as per electrical theory. This technique will be suitable for determining the number of fibres in a virgin or recycled carbon fibre bundle.


Original languageEnglish
Title of host publication16th European Conference on Composite Materials, ECCM 2014
Publication statusPublished - 1 Jan 2014
Event16th European Conference on Composite Materials, ECCM 2014 - Seville, Spain
Duration: 22 Jun 201426 Jun 2014


Conference16th European Conference on Composite Materials, ECCM 2014
Abbreviated titleECCM 2014


  • Carbon fibre, Electrical properties, Non-destructive testing, Recycling

ASJC Scopus subject areas