Mechanical properties and electrical conductivity in a carbon nanotube reinforced silicon nitride composite

A. Kovalčikova, C. Balázsi, J. Dusza, O. Tapasztó

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The influence of carbon nanotubes (CNTs) addition on basic mechanical, thermal and electrical properties of the multiwall carbon nanotube (MWCNT) reinforced silicon nitride composites has been investigated. Silicon nitride based composites with different amounts (1 or 3 wt%) of carbon nanotubes have been prepared by hot isostatic pressing. The fracture toughness was measured by indentation fracture and indentation strength methods and the thermal shock resistance by indentation method. The hardness values decreased from 16.2 to 10.1 GPa and the fracture toughness slightly decreased by CNTs addition from 6.3 to 5.9 MPa m1/2. The addition of 1 wt% CNTs enhanced the thermal shock resistance of the composite, however by the increased CNTs addition to 3 wt% the thermal shock resistance decreased. The electrical conductivity was significantly improved by CNTs addition (2 S/m in 3% Si3N 4/CNT nanocomposite).

Original languageEnglish
Pages (from-to)527-533
Number of pages7
JournalCeramics International
Volume38
Issue number1
DOIs
Publication statusPublished - Jan 2012

Fingerprint

Carbon Nanotubes
Silicon nitride
Carbon nanotubes
Mechanical properties
Composite materials
Thermal shock
Indentation
Fracture toughness
Hot isostatic pressing
Electric Conductivity
silicon nitride
Nanocomposites
Electric properties
Thermodynamic properties
Hardness

Keywords

  • C. Electrical conductivity
  • C. Mechanical properties
  • C. Thermal shock resistance
  • SiN-CNT composites

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Mechanical properties and electrical conductivity in a carbon nanotube reinforced silicon nitride composite. / Kovalčikova, A.; Balázsi, C.; Dusza, J.; Tapasztó, O.

In: Ceramics International, Vol. 38, No. 1, 01.2012, p. 527-533.

Research output: Contribution to journalArticle

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