Electrophoretic Deposition of Nanocrystalline SiC Ceramics

S. Wildhack; Fritz Aldinger

doi:10.4028/www.scientific.net/KEM.314.33

Paper Titles

3D Particle Assembly in Micro-Scale by Using Electrophoretic Micro-Fabrication Technique
p.7

The Evolution of the Electrical Field Drop over the Suspension during EPD
p.13

Adsorption Processes at Solid Surfaces-Studied by Electrokinetic Investigations
p.19

Design of Alumina/Alumina Laminate Composites with Crystalline-Orientated Layers Produced by Electrophoretic Deposition under a High Magnetic Field
p.25

Electrophoretic Deposition of Nanocrystalline SiC Ceramics
p.33

Electrophoretic Deposition of Zeolite 5A for Use in Supported Gas Separation Membranes
p.39

Electrophoretic Deposition of Green Parts for LPS SiC-Based Ceramics
p.45

Electrophoretic Deposition of Ceramic Powders-Influence of Suspension and Processing Parameters
p.51

Fabrication of Microstructures by Means of Electrophoretic Deposition (EPD)
p.57

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Electrophoretic Deposition of Nanocrystalline SiC Ceramics

Abstract:

In the present contribution, the electrophoretic deposition (EPD) of nanocrystalline SiC powders will be discussed. In order to avoid the electrolysis of water during deposition as well as oxygen uptake of the nanocrystalline SiC by hydrolysis reactions, nonaqueous solvents were tested including ethanol and diethyl formamide. The solvents were compared regarding their effect on particle size distributions and sedimentation tests. Auxiliary information on the surface conditions as a function of the acidity of the suspension was drawn from aqueous zeta-potential measurements. The influence of dispersants, binders and the type of powder on the suspension properties was studied, and EPD was performed. For promising solvent-dispersant systems, the film thickness, current and deposition time at a given voltage were monitored during EPD.