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Proceedings Paper

Spark plasma sintering of silver nanopowder
Author(s): H. B. Ng; C. Shearwood; T. J. White; L. G. Yu; K. A. Khor
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Paper Abstract

The spark plasma sintering behaviour of silver nanopowder prepared by the electro-explosion method was investigated. Consolidation was carried out from 50°C to 800°C for 5 mins at 34 MPa with differential scanning calorimetry indicating a sintering onset temperature as low as 160°C and an activation energy of 86±1 kJ/mol. Near full density resulted from treatment at 300°C, and at higher temperatures a normal Hall-Petch relation is obeyed. The enhancement of Vicker's hardness to 1000MPa for materials sintered at 300°C is three times greater than for silver annealed in a conventional way. While polysynthetic twinning contributes to superior hardness, the primary cause is the sub-micron grain size.

Paper Details

Date Published: 27 December 2007
PDF: 9 pages
Proc. SPIE 6799, BioMEMS and Nanotechnology III, 67990B (27 December 2007); doi: 10.1117/12.759383
Show Author Affiliations
H. B. Ng, Nanyang Technological Univ. (Singapore)
C. Shearwood, Nanyang Technological Univ. (Singapore)
T. J. White, Nanyang Technological Univ. (Singapore)
L. G. Yu, Nanyang Technological Univ. (Singapore)
K. A. Khor, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 6799:
BioMEMS and Nanotechnology III
Dan V. Nicolau; Derek Abbott; Kourosh Kalantar-Zadeh; Tiziana Di Matteo; Sergey M. Bezrukov, Editor(s)

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