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Anodic Spark Deposition from Aqueous Solutions of NaAlO 2 and Na 2 SiO 3
Author(s) -
BROWN S. D.,
KUNA K. J.,
VAN TRAN BAO
Publication year - 1971
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1971.tb12328.x
Subject(s) - anode , microprobe , deposition (geology) , constant current , electron microprobe , scanning electron microscope , aqueous solution , analytical chemistry (journal) , current density , materials science , spark (programming language) , current (fluid) , chemistry , mineralogy , composite material , metallurgy , physics , thermodynamics , electrode , paleontology , sediment , chromatography , quantum mechanics , computer science , biology , programming language
Coatings were deposited on Cu 0 , Ni 0 , and Al 0 anodes from aqueous solutions of NaAlO 2 and Na 2 SiO 3 by anodic spark deposition. Some coatings formed at constant current density (1.0 A/cm 2 ) were characterized by scanning electron microscopy, electron beam microprobe analysis, X‐ray diffraction, and emission spectroscopy. A relation for the current decay during a multiple‐spark, constant‐voltage process was determined. This relation, which describes the behavior of most of the systems studied, iswhere φ t , φ 0 , and φ ∞ are the current densities at time t , at the start of the decay ( t =0), and at the steady state, respectively. K is a constant that is voltage and system dependent.