Effect of carbon nanotube additions on the microstructure of hot-pressed alumina

Jeong Wook An, Dae-Soon Lim

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Alumina/carbon nanotube (CNT) composites with different CNT contents were fabricated by hot-pressing to investigate the effect of CNT additions on the microstructure and mechanical properties of the composites. Alumina/CNT powders were obtained by forming the CNTs with the aid of catalyst particles supported on the alumina particles. The CNT contents were varied from 0 to 12.5 wt.% by changing the content of the iron nitrate catalyst precursor. The relative densities and the matrix grain size decreased with increasing CNT content. Hardness reached a maximum with about 4 wt.% added CNT. The effect of CNT additions on microhardness was explained by the matrix microstructure and reinforcement effect of CNT.

Original languageEnglish
Pages (from-to)201-204
Number of pages4
JournalJournal of Ceramic Processing Research
Volume3
Issue number3 PART 2
Publication statusPublished - 2002 Dec 1

Keywords

  • Alumina/CNT composite
  • Carbon nanotube (CNT)
  • Microstructure

ASJC Scopus subject areas

  • Ceramics and Composites

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