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US5366691A
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Hyper-eutectic aluminum-silicon alloy powder and method of preparing the same
Assignee: Toyo Aluminum KK
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Filing: 1991-10-31
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Granted: 1994-11-22
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Expires: 2011-10-31
Abstract
Abstract A hyper-eutectic aluminum-silicon powder containing extremely fine primary crystal silicon, is prepared by atomizing. First, a molten metal of a hyper-eutectic aluminum-silicon alloy containing phosphorus is prepared. This molten metal or melt is atomized with air or an inert gas and quench-solidified. Aluminum-silicon alloy powder containing primary crystal silicon of not more than 10 μm in crystal grain size is obtained. This aluminum-silicon alloy powder contains at least 12 percent by weight and not more than 50 percent by weight of silicon and at least 0.0005 percent by weight and not more than 0.1 percent by weight of phosphorus. When this hyper-eutectic aluminum-silicon alloy powder is employed, it is possible to prepare a consolidate of powder which has improved mechanical properties, and provides a high yield.
Inventors
- 👤 Yoshinobu Takeda
- 👤 Tetsuya Hayashi
- 👤 Toshihiko Kaji
- 👤 Yusuke Odani
- 👤 Kiyoaki Akechi
- 👤 Jun Kusui
- 👤 Takamasa Yokote
- 👤 Akiei Tanaka
- 👤 Takashi Watsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/0408; C22C1/0416
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
89 words
A hyper-eutectic aluminum-silicon alloy powder, comprising primary crystal silicon within the range of at least 12 percent by weight and at the most 50 percent by weight of said alloy powder, and phosphorus within the range of at least 0.0005 percent by weight and at the most 0.1 percent by weight of said alloy powder, said primary crystal silicon having a grain size of 10 μm at the most, said alloy powder having a particle size of 400 μm at the most, the remainder being aluminum and unavoidable impurities.
Claim 2
Dependent Claim
89 words
A hyper-eutectic aluminum-silicon alloy powder, comprising primary crystal silicon within the range of at least 12 percent by weight and at the most 50 percent by weight of said alloy powder, and phosphorus within the range of at least 0.0005 percent by weight and at the most 0.1 percent by weight of said alloy powder, said primary crystal silicon having a grain size of 10 μm at the most, said alloy powder having a particle size of 400 μm at the most, the remainder being aluminum and unavoidable impurities.
Claim 3
Dependent Claim
34 words
The hyper-eutectic aluminum-silicon alloy powder of claim 1, wherein said phosphorus is within the range of at least 0.0005 percent by weight and at the most 0.05 percent by weight of said alloy powder.
Claim 4
Dependent Claim
34 words
The hyper-eutectic aluminum-silicon alloy powder of claim 1, wherein said phosphorus is within the range of at least 0.02 percent by weight and at the most 0.1 percent by weight of said alloy powder.
Claim 5
Dependent Claim
82 words
The hyper-eutectic aluminum-silicon alloy powder of claim 1, further comprising at least 2.0 percent by weight and at the most 3.0 percent by weight of copper, at least 0.5 percent by weight and at the most 1.5 percent by weight of magnesium, at least 0.2 percent by weight and at the most 0.8 percent by weight of manganese, and at least 0.0005 percent by weight and at the most 0.05 percent by weight of phosphorus, the remainder being aluminum and unavoidable impurities.
Claim 6
Independent Claim
143 words
A method of producing a hyper-eutectic aluminum-silicon alloy powder, comprising the following steps: (a) melting aluminum-silicon alloy to form a melt, (b) preparing a refiner containing phosphorus as a crystal silicon refiner; (c) adding said refiner to said melt to such an extent that said melt contains phosphorus within the range of 0.0005 percent by weight and at the most 0.1 percent by weight of said melt to form an aluminum-silicon alloy melt comprising 12 percent by weight to at the most 50 percent by weight of silicon, the remainder being aluminum and unavoidable impurities, (d) atomizing said aluminum-silicon alloy melt containing said phosphorus with one of air and an inert gas to form powder particles, and (e) classifying said powder particles by sifting through a respective screen, so that said alloy powder has a particle size of 400 μm at the most.
Claim 7
Independent Claim
143 words
A method of producing a hyper-eutectic aluminum-silicon alloy powder, comprising the following steps: (a) melting aluminum-silicon alloy to form a melt, (b) preparing a refiner containing phosphorus as a crystal silicon refiner; (c) adding said refiner to said melt to such an extent that said melt contains phosphorus within the range of 0.0005 percent by weight and at the most 0.1 percent by weight of said melt to form an aluminum-silicon alloy melt comprising 12 percent by weight to at the most 50 percent by weight of silicon, the remainder being aluminum and unavoidable impurities, (d) atomizing said aluminum-silicon alloy melt containing said phosphorus with one of air and an inert gas to form powder particles, and (e) classifying said powder particles by sifting through a respective screen, so that said alloy powder has a particle size of 400 μm at the most.
Claim 8
Dependent Claim
30 words
The method of claim 5, further comprising solidifying said aluminum-silicon alloy melt containing said phosphorus to form an ingot, and remelting said ingot prior to said atomizing and solidifying steps.
Claim 9
Dependent Claim
50 words
The method of claim 5, wherein said step of atomizing and solidifying said alloy melt is performed while maintaining said alloy melt at a temperature within the range of at least a level exceeding the liquidus temperature of said aluminum-silicon alloy by 100° C. and 1300° C. at the most.
Claim 10
Dependent Claim
49 words
The method of claim 5, wherein said step of atomizing and solidifying said alloy melt is performed after holding said melt at a temperature within the range of at least a level exceeding the liquidus temperature of said aluminum-silicon alloy by 100° C. and 1300° C. at the most.
Claim 11
Dependent Claim
17 words
The method of claim 5, wherein said powder particles are quench solidified prior to said classifying step.
Claim 12
Independent Claim
72 words
A method of preparing a hyper-eutectic aluminum-silicon alloy powder, comprising the following steps: (a) preparing a molten metal of a hyper-eutectic aluminum-silicon alloy containing phosphorus, (b) preparing a hyper-eutectic aluminum-silicon alloy powder rapid solidified by atomizing said molten metal with air to form powder particles, and (c) classifying said powder particles by sifting through a respective screen so that said alloy powder has a particle size of 400 μm at the most.
Claim 13
Independent Claim
72 words
A method of preparing a hyper-eutectic aluminum-silicon alloy powder, comprising the following steps: (a) preparing a molten metal of a hyper-eutectic aluminum-silicon alloy containing phosphorus, (b) preparing a hyper-eutectic aluminum-silicon alloy powder rapid solidified by atomizing said molten metal with air to form powder particles, and (c) classifying said powder particles by sifting through a respective screen so that said alloy powder has a particle size of 400 μm at the most.
Claim 14
Dependent Claim
21 words
The method of claim 10, wherein said step of sifting selects a powder particle size of 200 μm at the most.
Claim 15
Dependent Claim
21 words
The method of claim 10, wherein said step of sifting selects a powder particle size of 100 μm at the most.
Claim 16
Dependent Claim
21 words
The method of claim 10, wherein said step of sifting selects a powder particle size of 50 μm at the most.
Claim 17
Dependent Claim
17 words
The method of claim 10, wherein said powder particles are quench solidified prior to said classifying step.
References Cited (Backward Citations)
GB1000323A
Cited
US3532775A
Cited
US3899820A
Cited
SU467945A1
Cited
US3953202A
Cited
US4113473A
Cited
JPS5937339A
Cited
US4669019A
Cited
US4592781A
Cited
US4808375A
Cited
JPS63266004A
Cited
JPH01147038A
Cited
JPH02213401A
Cited
US5009844A
Cited
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| 3.5 Years (Year 4) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
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