Patent JPS474600Y1 successfully refreshed from Google Patents.
US4909840A
Expired / Lapsed
US
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Process of manufacturing nanocrystalline powders and molded bodies
Assignee: FRIED
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Filing: 1988-04-07
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Granted: 1990-03-20
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Expires: 2008-04-07
Abstract
Abstract A process for the production of a secondary powder composition having a nanocrystalline structure and being comprised of binary or quasi-binary substances composed of at least one of the elements Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one of the elements V, Cr, Mn, Fe, Co, Ni, Cu and Pd, optionally also containing further ingredients, such as Si, Ge, B and/or oxides, nitrides, borides, carbides, and their possible mixed crystals. The components are in powdered form and are mixed in elementary form or as pre-alloys and have particle sizes ranging from 2 to 250 mu m. The powder components are subjected to high mechanical forces in order to produce secondary powders having a nanocrystalline structure. The secondary powders obtained in this way can be processed into molded bodies according to known compression molding processes, but at a temperature below the recrystallization temperature.
Inventors
- 👤 Wolfgang Schlump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:12
CPC Classifications
B; B82; B82Y; B82Y30/00; B22; B22F; B22F1/00; B22F1/05; B22F1/054; B22F1/09; B22F9/00; B22F9/02; B22F9/04; Y; Y10; Y10S; Y10S977/00; Y10S977/70; Y10S977/773; Y10S977/775; Y10S977/777
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
124 words
A process for the production of a secondary powder composition having a nanocrystalline structure and being comprised of binary or quasi-binary substances, the process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in elementary form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; and (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure.
Claim 2
Dependent Claim
124 words
A process for the production of a secondary powder composition having a nanocrystalline structure and being comprised of binary or quasi-binary substances, the process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in elementary form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; and (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure.
Claim 3
Dependent Claim
41 words
The process according to claim 1, wherein the powders to be mixed in step (a) further comprise at least one further ingredient selected from the group consisting of Si, Ge, B, and oxides, nitrides, borides, and carbides, and mixed crystals thereof.
Claim 4
Dependent Claim
14 words
The process according to claim 1, wherein step (b) is accomplished by cold forming.
Claim 5
Dependent Claim
15 words
The process according to claim 1, wherein step (b) is accomplished by high energy grinding.
Claim 6
Dependent Claim
15 words
The process according to claim 4, wherein high energy grinding is accomplished in an attritor.
Claim 7
Dependent Claim
136 words
A process for the production of a molded article having a nanocrystalline structure and comprised of binary or quasi-binary substances, the process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in elementary form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure; and (c) compression molding the secondary powder under conditions effective to provide the molded article.
Claim 8
Dependent Claim
136 words
A process for the production of a molded article having a nanocrystalline structure and comprised of binary or quasi-binary substances, the process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in elementary form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure; and (c) compression molding the secondary powder under conditions effective to provide the molded article.
Claim 9
Dependent Claim
32 words
The process according to claim 6, wherein the secondary powder has a recrystallization temperature and wherein step (c) proceeds at a temperature which is below the recrystallization temperature of the secondary powder.
Claim 10
Dependent Claim
15 words
The process according to claim 6, wherein step (c) is accomplished by hot isostatic pressing.
Claim 11
Dependent Claim
41 words
The process according to claim 6, wherein the powders to be mixed in step (a) further comprise at least one further ingredient selected from the group consisting of Si, Ge, B, and oxides, nitrides, borides, and carbides, and mixed crystals thereof.
Claim 12
Dependent Claim
14 words
The process according to claim 6, wherein step (b) is accomplished by cold forming.
Claim 13
Dependent Claim
15 words
The process according to claim 6, wherein step (b) is accomplished by high energy grinding.
Claim 14
Dependent Claim
15 words
The process according to claim 11, wherein high energy grinding is accomplished in an attritor.
Claim 15
Dependent Claim
121 words
A secondary powder composition having a nanocrystalline structure, being comprised of binary or quasi-binary substances, and being prepared by a process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in elementary form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; and (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure.
Claim 16
Dependent Claim
121 words
A secondary powder composition having a nanocrystalline structure, being comprised of binary or quasi-binary substances, and being prepared by a process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in elementary form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; and (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure.
Claim 17
Dependent Claim
43 words
The secondary powder composition according to claim 13, wherein the powders to be mixed in step (a) further comprise at least one further ingredient selected from the group consisting of Si, Ge, B, and oxides, nitrides, borides, and carbides, and mixed crystals thereof.
Claim 18
Dependent Claim
16 words
The secondary powder composition according to claim 13, wherein step (b) is accomplished by cold forming.
Claim 19
Dependent Claim
17 words
The secondary powder composition according to claim 13, wherein step (b) is accomplished by high energy grinding.
Claim 20
Dependent Claim
17 words
The secondary powder composition according to claim 16, wherein high energy grinding is accomplished in an attritor.
Claim 21
Dependent Claim
35 words
The secondary powder composition according to claim 13, wherein the powder mixture of step (a) is composed of one element selected from the first group and a plurality of elements selected from the second group.
Claim 22
Dependent Claim
35 words
The secondary powder composition according to claim 13, wherein the powder mixture of step (a) is composed of a plurality of elements selected from the first group and one element selected from the second group.
Claim 23
Dependent Claim
53 words
The secondary powder composition according to claim 13, wherein the powders mixed in step (a) comprise an alloy system, wherein the constitution/phase diagram exhibits a eutectic or eutectoid reaction, and wherein the powders are mixed in a mixing ratio selected to lie outside the marginal solubilities of the powders of the alloy system.
Claim 24
Dependent Claim
134 words
A molded article having a nanocrystalline structure, being comprised of binary or quasi-binary substances, and being prepared by a process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in pure form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure; and (c) compression molding the secondary powder under conditions effective to provide the molded article.
Claim 25
Dependent Claim
134 words
A molded article having a nanocrystalline structure, being comprised of binary or quasi-binary substances, and being prepared by a process comprising: (a) mixing powders of at least one element selected from a first group consisting of Y, Ti, Zr, Hf, Nb, Mo, Ta and W and at least one element selected from a second group consisting of V, Cr, Mn, Fe, Co, Ni, Cu and Pd to provide a powder mixture, said powders being in pure form or having the form of prealloys, and having a particle size ranging from 2 to 250 μm; (b) subjecting said powder mixture to high mechanical forces under conditions effective to convert the powder mixture to a secondary powder having a nanocrystalline structure; and (c) compression molding the secondary powder under conditions effective to provide the molded article.
Claim 26
Dependent Claim
33 words
The molded article according to claim 21, wherein the secondary powder has a recrystallization temperature and wherein step (c) proceeds at a temperature which is below the recrystallization temperature of the secondary powder.
Claim 27
Dependent Claim
16 words
The molded article according to claim 21, wherein step (c) is accomplished by hot isostatic pressing.
Claim 28
Dependent Claim
42 words
The molded article according to claim 21, wherein the powders to be mixed in step (a) further comprise at least one further ingredient selected from the group consisting of Si, Ge, B, and oxides, nitrides, borides, and carbides, and mixed crystals thereof.
Claim 29
Dependent Claim
15 words
The molded article according to claim 21, wherein step (b) is accomplished by cold forming.
Claim 30
Dependent Claim
16 words
The molded article according to claim 21, wherein step (b) is accomplished by high energy grinding.
Claim 31
Dependent Claim
16 words
The molded article according to claim 26, wherein high energy grinding is accomplished in an attritor.
Claim 32
Dependent Claim
34 words
The molded article according to claim 21, wherein the powder mixture of step (a) is composed of one element selected from the first group and a plurality of elements selected from the second group.
Claim 33
Dependent Claim
34 words
The molded article according to claim 21, wherein the powder mixture of step (a) is composed of a plurality of elements selected from the first group and one element selected from the second group.
Claim 34
Dependent Claim
52 words
The molded article according to claim 21, wherein the powders mixed in step (a) comprise an alloy system, wherein the alloy system exhibits a eutectic or eutectoid reaction, and wherein the powders are mixed in a mixing ratio selected to lie outside the marginal solubilities of the powders of the alloy system.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |