Mechanical And Electrical Properties Of Carbon Nanotube Buckypaper Reinforced Silicon Carbide Nanocomposites

Keywords

B. Interfaces; B. Nanocomposites; C. Electrical conductivity; C. Hardness; C. Toughness and toughening

Abstract

The nanocomposite was produced via phenolic resin infiltrating into a carbon nanotube (CNT) buckypaper preform containing B4C fillers and amorphous Si particles followed by an in-situ reaction between resin-derived carbon and Si to form SiC matrix. The buckypaper preform combined with the in-situ reaction avoided the phase segregation and increased significantly the volume fraction of CNTs. The nanocomposites prepared by this new process were dense with the open porosities less than 6%. A suitable CNT-SiC bonding was achieved by creating a B4C modified interphase layer between CNTs and SiC. The hardness increased from 2.83 to 8.58 GPa, and the indentation fracture toughness was estimated to increase from 2.80 to 9.96 MPa m1/2, respectively, by the reinforcing effect of B4C. These nanocomposites became much more electrically conductive with high loading level of CNTs. The in-plane electrical resistivity decreased from 124 to 74.4 μω m by introducing B4C fillers.

Publication Date

3-1-2016

Publication Title

Ceramics International

Volume

42

Issue

4

Number of Pages

4984-4992

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.ceramint.2015.12.011

Socpus ID

84955577714 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84955577714

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