Fabrication of al-matrix composites reinforced with amino functionalized boron nitride nanotubes

Sunil K. Singhal, Avanish K. Srivastava, Renu Pasricha, Rakesh B. Mathur

Research output: Contribution to journalArticle

Abstract

Amino functionalized boron nitride nanotubes were used as the reinforcement material for the fabrication of Al-matrix composites using powder metallurgy process. It was found that the mechanical properties of these composites were improved significantly as compared to pure Al composites fabricated under similar conditions. The microhardness of these composites was found to improve by five times and compressive strength by 300% as compared to pure Al composites under similar processing conditions. The enhanced mechanical properties of these composites can be attributed to the proper dispersion of boron nitride nanotubes (BNNTs) in Al matrix and the formation of a strong interfacial bonding between BNNTs and Al matrix under the processing conditions. Highresolution transmission electron microscopy studies revealed the formation of transition layer of AlB2 which might lead to a better load transfer from Al matrix to the BNNTs. Further, these composites are believed to withstand high temperatures as compared to Al matrix composites reinforced with carbon nanotubes and, therefore, can be used for applications where lightweight and high strength materials are desired with stability at elevated temperatures.

Original languageEnglish (US)
Pages (from-to)5179-5186
Number of pages8
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number6
DOIs
StatePublished - Dec 1 2011

    Fingerprint

Keywords

  • Amino functionalization
  • Ball milling
  • Boron nitride nanotubes
  • Composites
  • Microstructure

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

Cite this