Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1990-08-06
1992-04-07
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
294192, 29428, 295272, 16510426, 419 24, 419 30, 427 47, 427231, 427234, 4273768, F28D 1500
Patent
active
051015609
ABSTRACT:
A method for making an anisotropic or predominantly unidirectional wick primarily for use in heat pipes is disclosed unidirectional heat pipe wicks is made by supporting magnetically susceptible particles on a wire screen and moving the screen inside a magnetic field until the characteristic cone or point shapes assumed by the particles are aligned in a laid down orientation. The particles are then heat treated to yield a sintered wick. An example of a wick made with nickel powder demonstrates improved wicking in the direction pointed to by the laid down points. A wick is also made by the spinning pipe-slurry method for making heat pipe wicks. Magnetically susceptible powder is mixed into a viscous binder to make a slurry, then injected inside a rotating cylindrical heat pipe container. A magnetic field is created around the spinning container and varied to align the particles in a desired structure. The slurry is dried while still spinning to retain the desired structure and then heat treated to yield a sintered wick.
REFERENCES:
patent: 3762011 (1973-10-01), Staudhammer et al.
patent: 3840069 (1974-10-01), Fischer et al.
patent: 4274479 (1981-06-01), Eastman
patent: 4372377 (1983-02-01), Monis
patent: 4478275 (1984-10-01), Ernst
patent: 4515832 (1985-05-01), Roeder et al.
patent: 4674565 (1987-06-01), Beam
patent: 4940596 (1990-07-01), Wright
IBM Tech Disc Bulletin, vol. 14, No. 9, Feb. 1972, p. 2769, "Dendritic Wick for Heat Pipe Applications".
Hager Brian G.
Leonard John F.
Cuda Irene
Sinder Fredric L.
Singer Donald J.
The United States of America as represented by the Secretary of
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