Spark plasma sintering of wire exploded tungsten nano-powder

C. Shearwood; H. B. Ng

doi:10.1117/12.759375

Spark plasma sintering of wire exploded tungsten nano-powder

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

7 Citations (SciVal)

Abstract

Mechanical and thermodynamic measurements are reported for specimens spark plasma sintered from tungsten nano-powder. A maximum Vickers hardness of 3.31 ±0.03 GPa, at a relative density of 0.98 was achieved at sintering temperature of 1,800°C and above. This corresponds to the value of hardness for bulk tungsten. Grain size analysis indicated a grain growth activation energy of 160±10% KJ/mol. Sintering temperatures were found to be as much as 270°C lower than previously reported. During the Spark Plasma Sintering (SPS), a reduction in the amount of tungsten oxide was observed, especially at temperatures above 1,500°C. A number of mechanisms are thought to be responsible including the SPS induced decomposition of the oxide into metallic tungsten.

Original language	English
Title of host publication	Microelectronics
Subtitle of host publication	Design, Technology, and Packaging III
Place of Publication	U. S. A.
Publisher	SPIE
ISBN (Print)	9780819469694
DOIs	https://doi.org/10.1117/12.759375
Publication status	Published - 7 Dec 2007
Event	Microelectronics: Design, Technology, and Packaging III - Canberra, ACT, Australia Duration: 5 Dec 2007 → 7 Dec 2007

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	6798
ISSN (Print)	0277-786X

Conference

Conference	Microelectronics: Design, Technology, and Packaging III
Country/Territory	Australia
City	Canberra, ACT
Period	5/12/07 → 7/12/07

Keywords

Grain growth
Hardness
Nanocrystalline materials
Sintering
Tungsten

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.759375

Cite this

Spark plasma sintering of wire exploded tungsten nano-powder. / Shearwood, C.; Ng, H. B.
Microelectronics: Design, Technology, and Packaging III. U. S. A.: SPIE, 2007. 67981B (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6798).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Shearwood, C & Ng, HB 2007, Spark plasma sintering of wire exploded tungsten nano-powder. in Microelectronics: Design, Technology, and Packaging III., 67981B, Proceedings of SPIE - The International Society for Optical Engineering, vol. 6798, SPIE, U. S. A., Microelectronics: Design, Technology, and Packaging III, Canberra, ACT, Australia, 5/12/07. https://doi.org/10.1117/12.759375

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abstract = "Mechanical and thermodynamic measurements are reported for specimens spark plasma sintered from tungsten nano-powder. A maximum Vickers hardness of 3.31 ±0.03 GPa, at a relative density of 0.98 was achieved at sintering temperature of 1,800°C and above. This corresponds to the value of hardness for bulk tungsten. Grain size analysis indicated a grain growth activation energy of 160±10% KJ/mol. Sintering temperatures were found to be as much as 270°C lower than previously reported. During the Spark Plasma Sintering (SPS), a reduction in the amount of tungsten oxide was observed, especially at temperatures above 1,500°C. A number of mechanisms are thought to be responsible including the SPS induced decomposition of the oxide into metallic tungsten.",

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N2 - Mechanical and thermodynamic measurements are reported for specimens spark plasma sintered from tungsten nano-powder. A maximum Vickers hardness of 3.31 ±0.03 GPa, at a relative density of 0.98 was achieved at sintering temperature of 1,800°C and above. This corresponds to the value of hardness for bulk tungsten. Grain size analysis indicated a grain growth activation energy of 160±10% KJ/mol. Sintering temperatures were found to be as much as 270°C lower than previously reported. During the Spark Plasma Sintering (SPS), a reduction in the amount of tungsten oxide was observed, especially at temperatures above 1,500°C. A number of mechanisms are thought to be responsible including the SPS induced decomposition of the oxide into metallic tungsten.

AB - Mechanical and thermodynamic measurements are reported for specimens spark plasma sintered from tungsten nano-powder. A maximum Vickers hardness of 3.31 ±0.03 GPa, at a relative density of 0.98 was achieved at sintering temperature of 1,800°C and above. This corresponds to the value of hardness for bulk tungsten. Grain size analysis indicated a grain growth activation energy of 160±10% KJ/mol. Sintering temperatures were found to be as much as 270°C lower than previously reported. During the Spark Plasma Sintering (SPS), a reduction in the amount of tungsten oxide was observed, especially at temperatures above 1,500°C. A number of mechanisms are thought to be responsible including the SPS induced decomposition of the oxide into metallic tungsten.

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Spark plasma sintering of wire exploded tungsten nano-powder

Abstract

Publication series

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Keywords

ASJC Scopus subject areas

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