Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1988-10-24
1989-12-05
Echols, P. W.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
291573R, 291573H, 419 8, 419 36, 419 40, B22F 500
Patent
active
048851299
ABSTRACT:
A new method for making a sintered metal heat pipe wick is practiced by mixing nickel powder into a slurry with a viscous binder comprising water. Polyox and Methocel. The mixture is then injected inside a rotating stainless steel cylindrical heat pipe container, or pipe, to completely coat the inside surface of the pipe. The rotational rate of the pipe is then increased to force the slurry to level out to a uniform depth set by the thickness of sleeves attached at each end of the pipe. Forced air is then blown through the inside of the rotating pipe to dry the slurry and form a green wick. After stopping rotation of the pipe, it is then heated inside a sintering oven in a reducing atmosphere to disintegrate the binder and leave a sintered metal final composition of the wick. Thus produced wicks prevent "hot spots" because they have a more uniform thickness and are attached more evenly and securely than prior art heat pipe wicks to the inside walls of the heat pipe container.
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Beam Jerry E.
Leonard John F.
Cuda Irene
Echols P. W.
Sinder Fredric L.
Singer Donald J.
The United States of America as represented by the Secretary of
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