Electrophoretic deposition of Ti 3 SiC 2 and texture development in a strong magnetic field

Mrinalini Mishra, Yoshio Sakka, Chungfeng Hu, Tohru Suzuki, Tetsuo Uchikoshi, Laxmidhar Besra

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Abstract

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 ΔG 0 SP , the specific free energy of adsorption between the surface sites and the adsorbing polyelectrolyte (PEI) (The value of ΔG 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(hk0) = 0.35 and f L(00l) = 0.75, respectively).

Original languageEnglish
Pages (from-to)2857-2862
Number of pages6
JournalJournal of the American Ceramic Society
Volume95
Issue number9
DOIs
Publication statusPublished - 2012 Sep 1
Externally publishedYes

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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