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Nanostructured Bulk Solids by Field Activated Sintering

R. Vidu, D. Quach and J.R. Groza
University of California Davis, US

Keywords:
nanocrystalline, nanosize powders, sintering, plasma, densification

Abstract:
Field activated sintering is a novel processing technique with a high potential to process bulk nanomaterials with good interparticle bonding. The external field application is capable to induce fast densification and reasonable control of grain growth during sintering of nanocrystalline powders. The process has been applied for the densification of a variety of materials, electrically conductive, semiconductors or insulators. This presentation will overview examples of field sintered nanomaterials and focus on studies of electrical field effects in sintering. The main mechanisms involved during electrical field densification and the interplay between the applied electrical current and densifying materials during field assisted sintering (electrical discharge, constriction resistance, current uniformity, heating rate and pressure effects) will be addressed.

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