Next Article in Journal
Magnetic Properties of the Ferromagnetic Shape Memory Alloys Ni50+xMn27−xGa23 in Magnetic Fields
Next Article in Special Issue
Drilling Damage in Composite Material
Previous Article in Journal
Optical Properties of Electrically Tunable Two-Dimensional Photonic Lattice Structures Formed in a Holographic Polymer-Dispersed Liquid Crystal Film: Analysis and Experiment
Previous Article in Special Issue
Titania Nanotubes Grown on Carbon Fibers for Photocatalytic Decomposition of Gas-Phase Aromatic Pollutants
Article Menu

Export Article

Open AccessArticle
Materials 2014, 7(5), 3699-3714; doi:10.3390/ma7053699

Fabrication of a Low Density Carbon Fiber Foam and Its Characterization as a Strain Gauge

1
Mechanical and Aerospace Engineering Department, Naval Postgraduate School, 700 Dyer Rd., Monterey 93943, CA, USA
2
Hartnell College, Salinas, CA—Naval Postgraduate School, Monterey 93943, CA, USA
3
Physics Department, Naval Postgraduate School, 833 Dyer Rd., Monterey 93943, CA, USA
*
Author to whom correspondence should be addressed.
Received: 30 January 2014 / Revised: 28 March 2014 / Accepted: 29 April 2014 / Published: 8 May 2014
(This article belongs to the Special Issue Carbon Fibers)
View Full-Text   |   Download PDF [953 KB, uploaded 8 May 2014]   |  

Abstract

Samples of carbon nano-fiber foam (CFF), essentially a 3D solid mat of intertwined nanofibers of pure carbon, were grown using the Constrained Formation of Fibrous Nanostructures (CoFFiN) process in a steel mold at 550 °C from a palladium particle catalysts exposed to fuel rich mixtures of ethylene and oxygen. The resulting material was studied using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDX), Surface area analysis (BET), and Thermogravimetric Analysis (TGA). Transient and dynamic mechanical tests clearly demonstrated that the material is viscoelastic. Concomitant mechanical and electrical testing of samples revealed the material to have electrical properties appropriate for application as the sensing element of a strain gauge. The sample resistance versus strain values stabilize after a few compression cycles to show a perfectly linear relationship. Study of microstructure, mechanical and electrical properties of the low density samples confirm the uniqueness of the material: It is formed entirely of independent fibers of diverse diameters that interlock forming a tridimensional body that can be grown into different shapes and sizes at moderate temperatures. It regains its shape after loads are removed, is light weight, presents viscoelastic behavior, thermal stability up to 550 °C, hydrophobicity, and is electrically conductive. View Full-Text
Keywords: carbon nanofiber; viscoelastic; strain gauge; low weight; porous; electrically conductive; hydrophobic carbon nanofiber; viscoelastic; strain gauge; low weight; porous; electrically conductive; hydrophobic
Figures

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Luhrs, C.C.; Daskam, C.D.; Gonzalez, E.; Phillips, J. Fabrication of a Low Density Carbon Fiber Foam and Its Characterization as a Strain Gauge. Materials 2014, 7, 3699-3714.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top