Low-temperature spark plasma sintering of NiO nanoparticles

Rachman Chaim; Ram Reshef; Guanghua Liu; Zhijian Shen

doi:10.1016/j.msea.2010.11.050

Low-temperature spark plasma sintering of NiO nanoparticles

Rachman Chaim, Ram Reshef, Guanghua Liu, Zhijian Shen

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	2936-2940
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	528
Issue number	6
DOIs	https://doi.org/10.1016/j.msea.2010.11.050
State	Published - 15 Mar 2011
Externally published	Yes

Bibliographical note

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

Keywords

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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10.1016/j.msea.2010.11.050

Cite this

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title = "Low-temperature spark plasma sintering of NiO nanoparticles",

abstract = "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.",

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author = "Rachman Chaim and Ram Reshef and Guanghua Liu and Zhijian Shen",

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AU - Chaim, Rachman

AU - Reshef, Ram

AU - Liu, Guanghua

AU - Shen, Zhijian

N1 - Funding Information: The financial support by the Israel Ministry of Science under Contract #3-3429 and Swedish Research Council are gratefully acknowledged.

PY - 2011/3/15

Y1 - 2011/3/15

N2 - 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.

AB - 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.

KW - Densification

KW - Nanocrystalline

KW - NiO

KW - Particle sliding

KW - Spark plasma sintering

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JO - Materials Science and Engineering: A

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Low-temperature spark plasma sintering of NiO nanoparticles

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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