Electrodeposition of nanostructured calcium phosphate coating under magnetic field

To obtain nanostructured calcium phosphate (CaP) and improve the adhesion of CaP coating to carbon/carbon (C/C) composites, the CaP coating was deposited on the substrate through electrodeposition under magnetic field. The effect of magnetic fields with different orientations on the morphology, phase and adhesion strength between the coating and C/C composites was investigated. The octacalcium phosphate coating was deposited on C/C composites under magnetic fields with different orientations. The morphology of the coating could be altered by superimposed magnetic field. Fishbone-like particles composed of nanofibred CaP were formed on the C/C when the magnetic field was oriented parallel to the current density. A homogeneous coating with a flower-like structure was formed when the magnetic field was applied perpendicularly to the electric field. The flower-like structure was composed of nanosized and plate-like crystals. The adhesion of the coating to the C/C substrate was improved by applying magnetic field, especially magnetic field perpendicular to the electric field.