Engineered nanostructures for multifunctional single-walled carbon nanotube reinforced silicon nitride nanocomposites

Erica L. Corral, Joseph Cesarano, Amit Shyam, Edgar Lara-Curzio, Nelson Bell, John Stuecker, Nicola Perry, Matthew Di Prima, Zuhair Munir, Javier Garay, Enrique V. Barrera

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)

    Abstract

    Colloidal processing was used to make highly dispersed aqueous composite suspensions containing single-wall carbon nanotubes (SWNTs) and Si 3N4 particles. The SWNTs and Si3N4 particles were stabilized into composite suspensions using a cationic surfactant at low pH values. Bulk nanocomposites containing 1.0, 2.0, and 6.0 vol% SWNTs were successfully fabricated using rapid prototyping. The survival of SWNTs was detected, using Raman spectroscopy, after high-temperature sintering, up to 1800°C. The nanocomposites have densities up to 97% of the composite theoretical density. The engineered nanostructures reveal an increase in grindability and damage tolerance behavior over the monolithic ceramic. We also observed toughening mechanisms such as SWNT crack bridging and pull-out, indicating that SWNTs have the potential to serve as toughening agents in ceramics. Increased fracture toughness values over the monolithic Si 3N4 were observed for the 2.0-vol% SWNT-Si 3N4 nanocomposite when a given sintered microstructure was present. We report here the effects of colloidal processing on mechanical behavior of SWNT reinforced nonoxide ceramic nanocomposites.

    Original languageEnglish
    Pages (from-to)3129-3137
    Number of pages9
    JournalJournal of the American Ceramic Society
    Volume91
    Issue number10
    DOIs
    Publication statusPublished - Oct 1 2008

    All Science Journal Classification (ASJC) codes

    • Ceramics and Composites
    • Materials Chemistry

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