pH localization: a case study during electrophoretic deposition of ternary MAX phase carbide-Ti₃SiC₂

• MISHRA Mrinalini

  National Institute for Materials Science University of Tsukuba

• SAKKA Yoshio

  National Institute for Materials Science University of Tsukuba

• UCHIKOSHI Tetsuo

  National Institute for Materials Science

• BESRA Laxmidhar

  Institute of Minerals and Materials Technology

抄録

The pH localization phenomenon during electrophoretic deposition (EPD) of the MAX phase-Titanium silicon carbide (Ti₃SiC₂), from suspension in aqueous and mixed (water-ethanol) solvent was experimentally verified in presence of a cationic dispersant, polyethyleneimine (PEI). The local pHs at the electrodes were dependent on solid loadings of the suspensions; pH localization was pronounced at lower solid loading. Higher solid loading resulted in thicker deposits, shielding the electrode surface and hindering direct interaction of the electrode with the particles, thereby suppressing the change in local pH. Comparison of local pH at cathode during EPD from aqueous and mixed solvent revealed a delay in the attainment of isoelectric point (IEP) at the vicinity of electrode and slower deposition rate for mixed solvent. A necessity of concurrence between the IEP of the material and the local pH at the deposition electrode for a given system was established for the formation of good deposits.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 121 (1412), 348-354, 2013

  公益社団法人 日本セラミックス協会

キーワード

• Electrophoretic deposition
• Electrolysis
• pH localization
• MAX phase
• Ti₃SiC₂

詳細情報

• CRID: 1390282680264249856
• NII論文ID: 130004950844
• DOI: 10.2109/jcersj2.121.348
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/121/1412/121_JCSJ-P12194/_pdf
• 本文言語コード: en
• データソース種別:
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