Electroless coating of Permalloy powder and DC-resistivity
of alloy composites
A.
Ozols a,⁎, M.
Pagnola a
, D.
Iñaki García b
, H.
Sirkin a
a
Laboratorio de Sólidos Amorfos, Facultad de Ingeniería, Universidad de Buenos Aires, Av.
Paseo Colón 850, 1063...
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Electroless coating of Permalloy powder and DC-resistivity
of alloy composites
A.
Ozols a,⁎, M.
Pagnola a
, D.
Iñaki García b
, H.
Sirkin a
a
Laboratorio de Sólidos Amorfos, Facultad de Ingeniería, Universidad de Buenos Aires, Av.
Paseo Colón 850, 1063 Buenos Aires, Argentina
b
Centro Nacional de Investigaciones Metalúrgicas CENIM/CSIC, Madrid, Spain
Received 16 March 2005; accepted in revised form 18 October 2005
Available online 2 December 2005
Abstract
A high-resistivity coating of Permalloy (Ni–17.
81Fe–1.
97Mo wt.
%) powders for soft magnetic composites, SMC, was developed and
characterized.
The coating was made using the electroless plating method employing an aqueous solution of sodium and nickel phosphates.
The
chemical process led to the formation of a layer up to 1 μm thick deposited on each particle surface and composed of a mixture of Ni(OH)2, P2O5 and
NaPO3 compounds, as shown by X-ray photoelectron spectrometry and X-ray powder diffraction studies.
The effect of c
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