composite magnetic compacts and their forming methods

Details composite magnetic compacts and their forming methods composite magnetic compacts and their forming methods

1990-05-07

1991-03-26

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

148105, 148108, 252 6254, 252 6255, 419 19, 419 26, 419 27, 419 39, 419 48, 428469, 428900, B22F 326

Patent

active

050027271

ABSTRACT:
Composite magnetic compacts having good conductivity and excellent mechanical and magnetic properties and their forming methods. The composite magnetic compacts are basically made by forming mixtures consisting essentially of 1 to 50 percent by weight of a magnetic powder and the remaining percentage of a powder of superplastic Zn-22Al alloy. A drop in the strength of the compacts that occurs when the mixing percentage of the magnetic powder increases is made up for by the impregration of plastic in the compacts or the simpler addition of a plastic powder to the mixture of the powders of magnetic material and superplastic Zn-22Al alloy. The forming methods of the composite magnetic compacts are carried out at different temperatures and under different conditions depending on the composition of the powder mixtures and so on.

REFERENCES:
patent: 4020236 (1977-04-01), Aonuma et al.
patent: 4701301 (1987-10-01), Kuwahara et al.
patent: 4892596 (1990-01-01), Chatterjee

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