Spark plasma sintering of wire exploded tungsten nano-powder

C. Shearwood; H. B. Ng

doi:10.1117/12.759375

21 December 2007 Spark plasma sintering of wire exploded tungsten nano-powder

C. Shearwood, H. B. Ng

Proceedings Volume 6798, Microelectronics: Design, Technology, and Packaging III; 67981B (2007) https://doi.org/10.1117/12.759375
Event: SPIE Microelectronics, MEMS, and Nanotechnology, 2007, Canberra, ACT, Australia

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.

Citation Download Citation

C. Shearwood and H. B. Ng "Spark plasma sintering of wire exploded tungsten nano-powder", Proc. SPIE 6798, Microelectronics: Design, Technology, and Packaging III, 67981B (21 December 2007); https://doi.org/10.1117/12.759375

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