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Electrical Conductivity of Alumina/Aluminum Composites Synthesized by Directed Metal Oxidation
Author(s) -
Venugopalan Hari,
Tankala Kanishka,
DebRoy Tarasankar
Publication year - 1994
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.1151-2916.1994.tb04547.x
Subject(s) - composite number , electrical resistivity and conductivity , materials science , aluminium , metal , activation energy , conductivity , alloy , oxide , composite material , aluminium oxides , diffusion , aluminium oxide , metallurgy , chemistry , catalysis , biochemistry , physics , electrical engineering , thermodynamics , engineering
Electrical conductivities of Al 2 O 3 /A1 composite synthesized by directed oxidation of an aluminum alloy, and sintered Al 2 O 3 –4% MgO are measured. The high conductivity of the Al 2 O 3 /A1 composite compared to sintered Al 2 O 3 –4% MgO is shown as proof of the presence of continuous metal channels in the composite. Furthermore, the conductivity data are used to determine the activation energy for the diffusion of the dominant charge carrier in the oxide matrix.