Seminarium AMAS

The Use of Electrophoretic Deposition for the Fabrication of Ceramic Composites and Coatings

dr A.R. Boccaccini

wtorek, 13 stycznia 2004

14:00, room 108


Electrophoretic deposition (EPD) is a simple and cost-effective method for fabricating high-quality fibre reinforced ceramic matrix composites (CMCs) and ceramic coatings. In production of CMCs, EPD is used to infiltrate 2- or 3-dimensional fibre architectures using nanosized ceramic particles.

In this presentation, the use of the EPD technique to fabricate fibre reinforced ceramic matrix composites will be reviewed highlighting its advantages and limitations. A great variety of fibre and matrix combinations have been explored, including SiC, carbon, stainless steel and oxide ceramic fibre architectures and silica, borosilicate glass, alumina, zirconia, mullite, titania, hydroxyapatite, SiC and Si3N4 matrices. Most experimental results show that if the correct process parameters are chosen, good particle packing can be achieved, producing firm ceramic deposits well adhered to the fibres, which lead to pore-free composites. It will be shown that EPD is a versatile method for near-net shape fabrication of 3-D composite components of complex (e.g. non-planar) shapes, emphasizing that future R&D efforts should concentrate on the production of complex shape components, for which the EPD technique may represent the most technically viable and cost-effective fabrication option.

Particular examples to be discussed include: titania coatings on SiC, carbon and metallic fibres, as well as lead-zirconate-titanate (piezoelectric) coatings on metallic substrates, which are current interest in our Department.