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Green forming with nanoparticles

journal contribution
posted on 22.01.2007, 16:44 by Yuncheng Liang, N. Gregory, J.G.P. Binner
The potential for green forming with nanosized yttria-doped, partially stabilised zirconia (YPSZ) powder using both uniaxial compaction and colloidal suspensions has been investigated. Green compacts were fabricated from a Y-PSZ nanopowder, a submicron powder of similar composition and combinations of the two by die pressing at varying axial stress, with the effect of a micronising milling process on the green density also being examined. Results indicated that the incorporation of the nanopowder into the submicron powder increased green density by up to 17% whilst micronising helped to achieve green densities as high as 60% of theoretical, even with the pure nanopowder. The zeta potential, viscosity and mean particle size of two different Y-PSZ nanosuspensions were measured for two different anionic polyelectrolytes, polyacrylic acid (PAA) and polymethacrylic acid (PMAA). The results showed that both led to flocculation under acidic conditions and hence increasing viscosity with increasing polyelectrolyte concentration.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Pages

434739 bytes

Citation

LIANG, GREGORY and BINNER, 2004. Green forming with nanoparticles. Key Engineering Materials, 264-268, pp. 2319-2322

Publisher

© Trans Tech

Publication date

2004

Notes

This is Restricted Access. This article was published in the journal, Key Engineering Materials [© Trans Tech] and is available at: www.scientific.net.

ISSN

1013-9826

Language

en