[en] In this work the stability of TiN and TiC nanopowders in isopropyl alcohol as well as the fabrication of dense and well adhered thin coatings based on TiN and TiC by electrophoretic deposition (EPD) have been evaluated in terms of zeta potential and mass deposited when hydrazine is added. The surface of TiN and TiC nanoparticles has been modified to improve the dispersion in isopropyl alcohol adding a cationic polymer (polyethylenimine) as dispersant with two different molecular weights. The influence of acidic/basic character of the solvent also has been evaluated in order to reach the most efficient EPD process. It was found that the adsorption of polyethylenimine with higher molecular weight can preserve the homogeneity of TiC coatings. The surface of TiN nanoparticles can be tuned in order to achieve a similar polyethylenimine adsorption which also improves the deposition in basic media.
Disciplines :
Materials science & engineering
Author, co-author :
Mendoza Gallego, Carlos ; Spanish National Research Council > Instituto de Cerámica y Vidrio - CSIC
González, Zoilo; Spanish National Research Council > Instituto de Cerámica y Vidrio - CSIC
Castro, Yolanda; Spanish National Research Council > Instituto de Cerámica y Vidrio - CSIC
Ferrari, Begoña; Spanish National Research Council > Instituto de Cerámica y Vidrio - CSIC
Language :
English
Title :
Dispersion and stabilization of TiN and TiC nanoparticles in organic suspensions
Publication date :
2015
Event name :
5th International Conference on Electrophoretic Deposition: Fundamentals and Applications, EPD 2014
Event place :
Hernstein, Austria
Event date :
5-10 October 2014
By request :
Yes
Audience :
International
Journal title :
Key Engineering Materials
ISSN :
1013-9826
eISSN :
1662-9795
Publisher :
Trans Tech Publications, Aedermannsdorf, Switzerland
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