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US4728359A
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Method of producing a dispersion-hardened metal alloy
Assignee: MTU Aero Engines AG
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Filing: 1986-10-04
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Granted: 1988-03-01
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Expires: 2006-10-04
Abstract
Abstract A method of producing a dispersion-hardened metal alloy in which oxide particles are distributed uniformly in the metal matrix. The oxide particles, in finely divided form, are added to a solution of the metal along with a deglomerating agent so as to be dispersed in the solution as a colloid. The colloid suspension is then atomized and reduced to form a powder of the alloy with the oxide particles uniformly dispersed therein.
Inventors
- 👤 Werner Huther
- 👤 Wolfgang Betz
- 👤 Gerhard Andrees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:46
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/20; Y; Y10; Y10S; Y10S75/00; Y10S75/956
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
A method of producing a metal powder suitable for the production of a dispersion-hardened metal alloy, the metal powder having a dispersed phase of metal oxide in a metal alloy, said method comprising: forming a liquid solution in which a metal alloy is dissolved; adding to said liquid solution first particles which are not reactive with said metal alloy and which are also not reactive with said solution, adding a deglomerating agent to said solution so that the first particles are suspended therein and form a resultant colloidal suspension, atomizing said colloidal suspension to form atomized second particles of the dissolved metal alloy and also atomizing said first particles, drying the said first and second atomized particles; and reducing said atomized second particles to produce metal alloy powder particles in which the oxide form of said first particles is uniformly dispersed
Claim 2
Independent Claim
141 words
A method of producing a metal powder suitable for the production of a dispersion-hardened metal alloy, the metal powder having a dispersed phase of metal oxide in a metal alloy, said method comprising: forming a liquid solution in which a metal alloy is dissolved; adding to said liquid solution first particles which are not reactive with said metal alloy and which are also not reactive with said solution, adding a deglomerating agent to said solution so that the first particles are suspended therein and form a resultant colloidal suspension, atomizing said colloidal suspension to form atomized second particles of the dissolved metal alloy and also atomizing said first particles, drying the said first and second atomized particles; and reducing said atomized second particles to produce metal alloy powder particles in which the oxide form of said first particles is uniformly dispersed
Claim 3
Dependent Claim
16 words
A method as claimed in claim 1 wherein said metal alloy is an alloy of nickel.
Claim 4
Dependent Claim
20 words
A method as claimed in claim 1 wherein said first particles are Y 2 O 3 or ThO 2 .
Claim 5
Dependent Claim
22 words
A method as claimed in claim 3 wherein said first particles have a size of about 0.01 μm to about 0.1 μm.
Claim 6
Dependent Claim
26 words
A method as claimed in claim 4 wherein said first particles are present in an amount of up to 75% by volume of the metal alloy.
Claim 7
Dependent Claim
17 words
A method as claimed in claim 1 wherein said deglomerating agent is aluminum phosphate or trisodium phosphate.
Claim 8
Dependent Claim
35 words
A method as claimed in claim 1 wherein said metal alloy is an alloy of nickel and chromium in a ratio of 80:20 and said alloy is dissolved in HCl to form said liquid solution.
Claim 9
Dependent Claim
22 words
A method as claimed in claim 1 wherein said metal alloy is an alloy of nickel chromium and Co, Al, or Ti.
Claim 10
Dependent Claim
37 words
A method as claimed in claim 7 wherein said collidal suspension is atomized in a trickle tower and the atomized particles are introduced into a reaction chamber where the second particles are reduced to said powder particles.
Claim 11
Dependent Claim
23 words
A method as claimed in claim 9 wherein said first and second atomized particles are dried before being introduced into the reaction chamber.
Claim 12
Dependent Claim
40 words
A method as claimed in claim 8 wherein said colloidal suspension is atomized in a trickle tower and the atomized first and second particles are introduced into a reaction chamber where the second particles are reduced to said powder particles.
Claim 13
Dependent Claim
23 words
A method as claimed in claim 11 wherein said first and second atomized particles are dried before being introduced into the reaction chamber.
References Cited (Backward Citations)
US3617253A
Cited
US3501287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |