Fabrication of CNT-SiC/SiC composites by electrophoretic deposition

Electrophoretic Deposition in Production of Ceramic Matrix Composites

“…The wide range of successful application of electrophoretic deposition in preparation of CNT reinforced SiO 2 , TiO 2 or MnO 2 ceramic matrix nanocomposites was recently reviewed by Boccaccini et al [10] CNTs have also opened new opportunities to significantly improve the performance of the SiC-based composites for structural applications in future fusion reactor, where high thermal conductivity in combination with high toughness is of outmost importance. Since both, SiC powder and CNTs have highly negative ζ-potential in alkaline region, it is possible to prepare a relatively stable mixed SiC-CNT suspension either in water or in ethanol [9,11]. In the case of long "spaghettilike" CNTs, however, the entanglement of the relatively rigid nanotubes in SiC particles limits the packing density in the composite.…”

“…Kaya et al [48] recently reported when the use of EPD to fabricate an NdPO 4 or ZrO 2 interphase layer on alumina (Nextel) fibre mats that helped to produce an oxide-based composite with improved mechanical properties. Silicon carbide fibres were electrophoretically coated with carbon nanotubes (CNT) [11], which can be used as a more thermally conductive alternative to interphase layer than the pyrolytic carbon.…”

“…In contrast to dip-coating and vacuum infiltration, the electrophoretic deposition on SiC fibres resulted in the surface of fibres wholly coated with flaky graphite particles including the fibres at the centre of the bundles. In a slightly different way König et al [11] prepared carbon nanotubes (CNTs) coating on SiC fibres. To optimise the process, ζ-potentials of CNTs were first analysed.…”

“…Figure 8.38d presents the fibres with partly removed coating; the thickness of the coating can be estimated to less than 100 nm. It is obvious, however, that the thickness can be adapted in accordance to the need just by variation of the deposition S. Novak et al [11] time. In the same study, König et al prepared CNT-SiC f /SiC composite, where the SiC-fibres mats where first electrophoretically coated by CNTs and then the fabric was infiltrated with SiC-powder aqueous suspension.…”

Ceramic Coatings Obtained by Electrophoretic Deposition: Fundamentals, Models, Post-Deposition Processes and Applications

“…CNTs have been also used to make more effective the interface between fibres and matrix in SiC/SiC composites for fusion reactor applications (König et al, 2010). EPD was used to deposit multi-walled CNTs onto SiC fibres and to infiltrate the CNTs coated fibres mats with SiC powder.…”