Electrophoretic deposition interface coatings processing

This chapter reviews the novel fabrication process of continuous SiC SiC composites based on electrophoretic deposition (EPD). EPD process is very effective for achieving relatively homogeneous carbon coating with the thickness of several tens to hundreds nanometers on SiC fibers. Carbon interface with the thickness of at least 100 nm formed by EPD acts effectively for inducing interfacial debonding and fiber pullout during fracture, and the SiCj/SiC composites show excellent mechanical properties. From these results, it is demonstrated that the fabrication process based on EPD method is expected to be an effective way to control the interfaces of SiC SiC composites and to obtain high-performance SiC SiC composites. 

A novel processing route uses in situ electrophoretic deposition of submicron sized colloidal particles of borosilicate sol onto nickel coated carbon fibers to give a dense fully infiltrated product, which is followed by pressureless sintering. Catastrophic crack growth was prevented by constrained plastic deformation of the interface, fiber debonding and pullout [136]. 

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