Stabilization of acicular, ferromagnetic metal powders essential

Details Stabilization of acicular, ferromagnetic metal powders essential Stabilization of acicular, ferromagnetic metal powders essential

1992-05-06

1993-04-06

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148287, H01F 102

Patent

active

051999986

ABSTRACT:
Acicular, ferromagnetic metal powders essentially consisting of iron are stabilized against oxidation and corrosion by a two-stage reaction of the metal powder with an oxygen-containing inert gas, by a process in which this gas mixture has a water vapor content of from 70 to 95% relative humidity in the second stage and the oxygen content is from 10 to 20%.

REFERENCES:
patent: 3967986 (1976-07-01), Rau et al.
patent: 4420330 (1983-12-01), JaKusch et al.
patent: 4960462 (1990-10-01), Mueller et al.
An Analytical Model of the Write Process in Digital Magnetic Recording, Williams et al. (AIP Conf. Proc. 5 (1971), 738-743.

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