Low-temperature spark plasma sintering of NiO nanoparticles

Rachman Chaim, Ram Reshef, Guanghua Liu, Zhijian Shen

Research output: Contribution to journalArticlepeer-review


NiO nanoparticles of 20nm in diameter were spark plasma sintered between 400°C and 600°C for 5 and 10min durations. Application of 100MPa pressure from room temperature resulted in densities between 75% and 92%. The final grain size was between 26nm and 68nm. Lower densities were recorded when 100MPa was applied at the SPS temperature. Two shrinkage rate maxima of ∼3.4×10-3s-1 and ∼2×10-3s-1 were observed around 390±10°C and at the SPS temperature. The two shrinkage rate maxima were related to densification by particle sliding followed by diffusional grain boundary sliding during the heating. The strong effects of the surface and interfacial processes which are active during the SPS were highlighted.

Original languageEnglish
Pages (from-to)2936-2940
Number of pages5
JournalMaterials Science and Engineering: A
Issue number6
StatePublished - 15 Mar 2011
Externally publishedYes

Bibliographical note

Funding Information:
The financial support by the Israel Ministry of Science under Contract #3-3429 and Swedish Research Council are gratefully acknowledged.


  • Densification
  • Nanocrystalline
  • NiO
  • Particle sliding
  • Spark plasma sintering

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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