Premium
Electrophoretic Deposition of Ti 3 SiC 2 and Texture Development in a Strong Magnetic Field
Author(s) -
Mishra Mrinalini,
Sakka Yoshio,
Hu Chungfeng,
Suzuki Tohru S.,
Uchikoshi Tetsuo,
Besra Laxmidhar
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05296.x
Subject(s) - dispersant , electrophoretic deposition , materials science , suspension (topology) , surface charge , texture (cosmology) , electrophoresis , adsorption , deposition (geology) , dispersion (optics) , chemical engineering , analytical chemistry (journal) , composite material , chemistry , chromatography , optics , physics , coating , organic chemistry , image (mathematics) , paleontology , homotopy , sediment , pure mathematics , mathematics , artificial intelligence , computer science , engineering , biology
In this study,we have shown the applicability of electrophoretic deposition ( EPD ) for shape‐forming in Ti 3 SiC 2 —a representative MAX phase; and viability of texture development thereof by application of a strong magnetic field (12 T). The dispersion characteristics of Ti 3 SiC 2 suspension were investigated in terms of surface charge, rheological measurement, and adsorption study. Polyethyleneimine has been used as dispersant to stabilize the suspension. It was found that the iso‐electric point ( IEP ) of Ti 3 SiC 2 powder was pH IEP ~ 4. The surface charge of powder changed in presence of the Polyethyleneimine dispersant and IEP shifted significantly towards basic pH ~ 10. The shift in IEP has been quantified in terms of Δ G 0 SP , the specific free energy of adsorption between the surface sites and the adsorbing polyelectrolyte ( PEI ) (The value of Δ G 0 SP obtained is −9.521 RT units). The optimized suspension parameters for EPD were determined as 10 vol% Ti 3 SiC 2 and 1 dwb PEI in 50% ethanolic water at pH ~ 7. X ‐ray diffraction analysis of the textured samples developed, revealed that the preferred orientation of Ti 3 SiC 2 grains parallel to the magnetic field direction was along the a , b ‐axis (The Lotgering orientation factors on the textured top surface and textured side surface were determined as f L( hk 0) = 0.35 and f L(00 l ) = 0.75, respectively).