Patent US525785A successfully refreshed from Google Patents.
US4405535A
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Preparation of rapidly solidified particulates
Assignee: Battelle Memorial Institute Inc
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Filing: 1981-10-29
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Granted: 1983-09-20
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Expires: 2001-10-29
Abstract
Abstract Normally solid materials, e.g. metals or metal alloys, are provided as solid particulates, and preferably as fine spherical to almost spherical, as well as fiber-like, particulates, including solid particulates of a metallic glassy structure, by contacting a molten stream of the material, which at a temperature within 25 percent of its equilibrium melting point °K. has a surface tension of 10 to 2500 dynes/cm. and a viscosity of 0.001 to 1 poise, preferably from 10° C. to 100° C. above its melting point, with a rapidly moving wall of a centrifugally disposed rotating liquid quench fluid, e.g. water or an oil, etc., in a manner adapted to disrupt the stream with breaking of the stream into molten globules or particles and to quench rapidly those globules or particles into the solid particulates. The produced solid particulates subsequently are separated from the liquid quench fluid and classified to find utility for example in powder metallurgical applications.
Inventors
- 👤 Ramaswamy V. Raman
- 👤 Robert E. Maringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:33
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/10; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B22F2009/0804; B22F2009/0812; B22F9/082; B22F2009/084; B22F2009/086; B22F2009/0864; B22F2009/0872
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
106 words
A method of preparing solid particulates comprising the steps of (a) heating a solid material to a molten state adapted to provide a molten unbroken stream of the material which at a temperature within 25 percent of its equilibrium melting point in °K. has a surface tension in the range of 10 to 2500 dynes/cm. and a viscosity in the range of 0.001 to 1 poise; and (b) flowing the molten unbroken stream into contact with a moving wall of a centrifugally disposed rotating liquid quench fluid in a manner adapted to subdivide the molten stream and to quench into solid particulates within the quench fluid.
Claim 2
Independent Claim
106 words
A method of preparing solid particulates comprising the steps of (a) heating a solid material to a molten state adapted to provide a molten unbroken stream of the material which at a temperature within 25 percent of its equilibrium melting point in °K. has a surface tension in the range of 10 to 2500 dynes/cm. and a viscosity in the range of 0.001 to 1 poise; and (b) flowing the molten unbroken stream into contact with a moving wall of a centrifugally disposed rotating liquid quench fluid in a manner adapted to subdivide the molten stream and to quench into solid particulates within the quench fluid.
Claim 3
Dependent Claim
20 words
The method of claim 1 including a subsequent step of separating and recovering the solid particulates from the quench fluid.
Claim 4
Dependent Claim
24 words
The method of claim 2 including a subsequent step of cooling of quench fluid with a recirculation thereof for contacting by the molten stream.
Claim 5
Dependent Claim
24 words
The method of claim 1 in which the moving wall of said quench fluid is at a speed between about 140 to 30,000 ft./min.
Claim 6
Independent Claim
102 words
A method for preparing metal particulates, which method comprises: (a) contacting a molten stream of metal or metal alloy, which at a temperature within 25 percent of its equilibrium melting point in °K. has a surface tension in the range of 10 to 2500 dynes/cm. and a viscosity in the range of 0.001 to 1 poise, and a moving wall of a centrifugally disposed rotating liquid quench fluid in a manner adapted to disrupt said stream with breaking of the stream into molten particles and to quench into solid particulates; and (b) separating and recovering the solid particulates from the quench fluid.
Claim 7
Independent Claim
102 words
A method for preparing metal particulates, which method comprises: (a) contacting a molten stream of metal or metal alloy, which at a temperature within 25 percent of its equilibrium melting point in °K. has a surface tension in the range of 10 to 2500 dynes/cm. and a viscosity in the range of 0.001 to 1 poise, and a moving wall of a centrifugally disposed rotating liquid quench fluid in a manner adapted to disrupt said stream with breaking of the stream into molten particles and to quench into solid particulates; and (b) separating and recovering the solid particulates from the quench fluid.
Claim 8
Dependent Claim
31 words
The method of claim 5 in which the molten stream is at a temperature of between 10° C. to 100° C. above the liquidus temperature of the metal or metal alloy.
Claim 9
Dependent Claim
28 words
The method of claim 6 in which the moving wall of the centrifugally disposed rotating liquid quench fluid is moving at a velocity of at least 7500 ft./min.
Claim 10
Dependent Claim
12 words
The method of claim 7 employing water as said liquid quench fluid.
Claim 11
Dependent Claim
13 words
The method of claim 7 employing an oil as said liquid quench fluid.
Claim 12
Independent Claim
156 words
A method of making solid particulates from normally solid metal or metal alloy, which comprises the steps of: (a) melting said metal or metal alloy and providing a molten stream thereof, which at a temperature within 25 percent of its equilibrium melting point in °K. has a surface tension in the range of 10 to 2500 dynes/cm. and a viscosity in the range of 0.001 to 1 poise; (b) providing a moving cylindrical ring-like mass of a centrifugally disposed rotating liquid quench fluid; (c) directing the molten stream into contact with a moving wall of the moving cylindrical ring-like mass of the centrifugally disposed rotating liquid quench fluid in a manner adapted to disrupt the molten stream and with breaking of the stream into molten particles and with cooling by said centrifugally disposed rotating quench fluid of the molten particles to solid particulates; and (d) separating and recovering the solid particulates from the liquid quench fluid.
Claim 13
Independent Claim
156 words
A method of making solid particulates from normally solid metal or metal alloy, which comprises the steps of: (a) melting said metal or metal alloy and providing a molten stream thereof, which at a temperature within 25 percent of its equilibrium melting point in °K. has a surface tension in the range of 10 to 2500 dynes/cm. and a viscosity in the range of 0.001 to 1 poise; (b) providing a moving cylindrical ring-like mass of a centrifugally disposed rotating liquid quench fluid; (c) directing the molten stream into contact with a moving wall of the moving cylindrical ring-like mass of the centrifugally disposed rotating liquid quench fluid in a manner adapted to disrupt the molten stream and with breaking of the stream into molten particles and with cooling by said centrifugally disposed rotating quench fluid of the molten particles to solid particulates; and (d) separating and recovering the solid particulates from the liquid quench fluid.
Claim 14
Dependent Claim
25 words
The method of claim 10 employing a metal alloy and adapted to provide a significant amount of solid spherical particulates in a metallic glassy state.
Claim 15
Dependent Claim
45 words
The method of claim 11 in which the moving cylindrical ring-like mass is moving at a velocity of at least 7500 ft./min. and the molten stream is at a temperature between 10° C. and 100° C. above the melting point of the employed metal alloy.
Claim 16
Dependent Claim
18 words
The method of claim 10 in which the stream is of a diameter less than about 0.04 in.
Claim 17
Dependent Claim
11 words
The method of claim 10 employing tin for the solid metal.
Claim 18
Dependent Claim
14 words
The method of claim 10 employing a nickel-base alloy for the solid metal alloy.
Claim 19
Dependent Claim
12 words
The method of claim 10 employing water for said liquid quench fluid.
Claim 20
Dependent Claim
13 words
The method of claim 10 employing an oil for said liquid quench fluid.
Claim 21
Dependent Claim
15 words
The method of claim 10 employing a gas pressure for forcefully directing the molten stream.
Claim 22
Dependent Claim
30 words
The method of claim 10 in which following the separating and recovering there is performed a size classification providing spherical and fiber fine-sized solid particulates of a metallic glassy structure.
Claim 23
Dependent Claim
28 words
The method of claim 10 in which quench fluid is removed, cooled and returned to said moving cylindrical ring-like mass to maintain said mass at a desired temperature.
Claim 24
Dependent Claim
27 words
The method of claim 10 in which the directing of the molten stream into said contact includes passage of the molten stream through an inert gaseous environment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |