NDLI: Electrophoretic deposition of ZrO$_{2}$–Y$_{2}$O$_{3}$: a bi-component study concerning self-assemblies

Content Provider	Springer Nature Link
Author	Castro, Ricardo H. R. Kodama, Paulo K. Gouvêa, Douglas Muccillo, R.
Copyright Year	2009
Abstract	There are many industrial advantages of using mechanical multi-oxides mixtures to obtain ceramic parts by electrophoretic deposition (EPD). This is mainly because one could avoid complex chemical synthesis routes to achieve a desirable composition. However, EPD of these suspensions is not an easy task as well since many different surfaces are present, leading to unexpected suspension behavior. The particles surface potentials and interactions can, however, be predicted by an extension of the DLVO theory. Using this theory, one can control the suspension properties and particles distribution. The objective of this work was to apply the colloidal chemistry theories to promote the formation of a heterocoagulation between ZrO$_{2}$ and Y$_{2}$O$_{3}$ particles in ethanol suspension to achieve a suitable condition for EPD. After identifying a condition where those particles had opposite surface charges and adequate relative sizes, heterocoagulation was observed at operational pH 7.5, generating an organized agglomerate with ZrO$_{2}$ particles surrounding Y$_{2}$O$_{3}$, with a net zeta potential of −16.6 mV. Since the agglomerates were stable, EPD could be carried out and homogeneous deposits were obtained. The deposited bodies were sintered at 1600 °C for 4 h and partially stabilized ZrO$_{2}$ could be obtained without traces of Y$_{2}$O$_{3}$ second phases.
Starting Page	1851
Ending Page	1857
Page Count	7
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	44
Issue Number	7
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2009-02-03
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics Crystallography Continuum Mechanics and Mechanics of Materials Polymer Sciences Characterization and Evaluation of Materials Materials Science
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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