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- Title
Nickel-Alumina Functionally Graded Materials by Electrophoretic Deposition.
- Authors
Nagarajan, Nandakumar; Nicholson, Patrick S.
- Abstract
Electrophoretic deposition has been used to synthesize nickel- alumina, functionally graded materials from NiO and alumina suspensions in ethanol. Suspension stability and the kinetics of deposition were studied to determine optimum conditions. Deposition starts with an alumina suspension into which a stream of NiO suspension is injected at various flow rates to obtain the desired profiles. The latter were controlled by varying the deposition current density and component flow rate. The green bodies obtained were sintered in Ar/H2 atmosphere to reduce the NiO to nickel. Various gradation profiles were obtained illustrating the facility of EPD to synthesize continuously graded materials. NiO was used as the precursor for nickel to alleviate settling and rough columnar deposit problems.
- Subjects
ALUMINUM oxide; IRON metallurgy; ISOSTATIC pressing; POWDER metallurgy; ELECTROPHORETIC deposition; SEDIMENTATION &; deposition
- Publication
Journal of the American Ceramic Society, 2004, Vol 87, Issue 11, p2053
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1151-2916.2004.tb06359.x