Spark plasma sintering of Al2O3-Ni nanocomposites using Ni nanoparticles produced by rotary chemical vapour deposition

Jianfeng Zhang, Rong Tu, Takashi Goto

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Al2O3-Ni nanocomposites were fabricated by spark plasma sintering (SPS) using Ni nanoparticle produced by rotary chemical vapour deposition. Carbon-free Ni nanoparticles were prepared by reacting NiCp2 with O2 to form NiO and then reducing to Ni by H2 for 30min at 823K. The highest Ni content and grain size were 7.8wt.% and 47.7nm, respectively, using a NiCp2 supply rate (Rs) of 1.67×10-6kgs-1. At a sintering temperature (TSPS) of 1573K, the hardness of Al2O3-3.8wt.% Ni was 20.5GPa, around 1GPa higher than that of monolithic Al2O3 sintered at the same temperature. The tensile strength of Al2O3-4.6wt.% Ni was 170MPa, 60MPa higher than that of Al2O3 sintered at 1573K.

Original languageEnglish
Pages (from-to)435-441
Number of pages7
JournalJournal of the European Ceramic Society
Volume34
Issue number2
DOIs
Publication statusPublished - 2014 Feb 1

Keywords

  • AlO-Ni nanocomposite
  • Rotary chemical vapour deposition
  • Spark plasma sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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