Thermoplastic coated magnetic powder compositions and methods of making same
AssigneeHoeganaes Corporation
InventorsHoward G. Rutz, Christopher Oliver, Brooks Quin
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Abstract
An iron powder composition comprising an iron powder coated with a substantially uniform coating of a thermoplastic material and admixed with a boron nitride powder and a method of utilizing the mixture to produce a magnetic core component is provided. The iron powder mixture is formulated with up to about 1% by weight of boron nitride which reduces the stripping and sliding die ejection pressures during high temperature molding and also improves the permeability of the magnetic part over an extended frequency range.
Claims14
A ferromagnetic powder composition for molding magnetic components comprising
- iron core particles having a substantially uniform coating of a thermoplastic material surrounding the iron particles, said thermoplastic material constituting from about 0.001% to about 15% by weight of the iron particles as coated;
- and
- boron nitride powder admixed with said coated particles in an amount up to about 1% by weight of the coated particles.
Dependencies are inferred from the claim text.