Method for sealing porous metals

Details Method for sealing porous metals Method for sealing porous metals

1985-02-19

1986-05-27

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 8, 419 31, 419 32, 419 36, 419 38, 419 47, 419 54, 419 55, 419 57, 419 58, 419 60, 4273761, 4273837, 428550, 428682, 428704, B22F 700

Patent

active

045914800

ABSTRACT:
A method for sealing porous metals, which comprises applying powder of a eutectic alloy containing an element having a good diffusibility in a porous metal or powder of a mixture of metals capable of forming the eutectic alloy, to the surface of a porous metal member and heating the surface applied with the powder at a temperature higher than the eutectic temperature of the eutectic alloy to thereby cause the molten eutectic alloy to intrude into pores from the surface of the porous metal member, whereby the melting point of the molten alloy in the pores is promptly increased by diffusion of the element in the porous metal member to solidify the molten metal in the pores, sealing only pores present in the vicinity of the surface of the porous metal member.

REFERENCES:
patent: 4000980 (1977-01-01), Marishita
patent: 4223434 (1980-09-01), Wang et al.
Metal Surface Technique, vol. 32, No. 8.

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