Aluminum powder prepared from scrap aluminum and multi-layer, po

Details Aluminum powder prepared from scrap aluminum and multi-layer, po Aluminum powder prepared from scrap aluminum and multi-layer, po

1992-10-13

1994-01-18

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder shape or size characteristics

419 32, 75249, 252 62, B22F 300, E04B 174

Patent

active

052797864

ABSTRACT:
Multi-layer, porous material and process of manufacturing same produced from aluminum scrap powder by means of a centrifugal atomizer for use in noise absorbing devices and filter elements. The multi-layers are arranged according to increasing particle size so that a first layer contains the largest particle size and a last layer contains the smallest particle size. Arranging the layer sin this manner produces a multilayer porous material having a shell configuration of a conch which effectively absorbs noise.

REFERENCES:
patent: 4147766 (1979-04-01), Kozischek
patent: 4283465 (1981-08-01), Morimoto et al.
patent: 4834281 (1989-05-01), Morimoto et al.

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