The effect of deposition time on textured magnesium diboride thick films fabricated by electrophoretic deposition
Abstract
MgB2 powders suspended in ethanol were electrophoretically deposited on high purity molybdenum substrates by applying a current density of ~0.02 mA/cm2 and voltage of 600 V. The effect of deposition time was studied by varying it as follows: 15 sec, 30 sec, 1 min, and 2 min. MgB2 thick films were successfully fabricated for the deposition carried out for 2 minutes. Deposition times less than 2 minutes resulted in insufficient deposited powder hence formation of MgB2 was not facilitated. Films deposited at 15, and 30 secs had good surface characteristics, wherein no micro cracks were present. X-ray diffraction and surface image analysis reveal that the deposited films have a preferred orientation along the (10l) direction.