Spark plasma sintering microscopic mechanisms of metallic systems: Experiments and simulations

The microscopic densification mechanisms of metallic systems (TiAl, Ag‐Zn) by spark plasma sintering ( SPS ) have been studied by simulations and experiments. Finite element simulations showed that, despite very high current densities at the necks between metallic powder particles (≈5 × 10 4 A/cm 2...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2019-02, Vol.102 (2), p.654-661
Main Authors: Trzaska, Zofia, Collard, Christophe, Durand, Lise, Couret, Alain, Chaix, Jean‐Marc, Fantozzi, Gilbert, Monchoux, Jean‐Philippe
Format: Article
Language:English
Subjects:
Activation energy
Condensed Matter
Densification
Diffusion rate
Dislocation mobility
Energy measurement
Engineering Sciences
Experiments
Foils
Hot pressing
Intermetallic compounds
Ion beams
Materials
Materials Science
Mechanics
Mechanics of materials
Metal powders
Overheating
Physics
Plasma sintering
Plastic properties
Reaction kinetics
Recrystallization
Silver
Simulation
Spark plasma sintering
Titanium aluminides
Zinc
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Summary:The microscopic densification mechanisms of metallic systems (TiAl, Ag‐Zn) by spark plasma sintering ( SPS ) have been studied by simulations and experiments. Finite element simulations showed that, despite very high current densities at the necks between metallic powder particles (≈5 × 10 4 A/cm 2 ), only very limited Joule overheating can be expected at these locations (1000 A/cm 2 ) on diffusion kinetics. Consequently, densification by SPS occurs by classical mechanisms not affected by the current.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.15999