EP0232772B1 - Procédé de préparation d'un matériau pulvérulent amorphe par un procédé de broyage - Google Patents
Procédé de préparation d'un matériau pulvérulent amorphe par un procédé de broyage Download PDFInfo
- Publication number
- EP0232772B1 EP0232772B1 EP87100949A EP87100949A EP0232772B1 EP 0232772 B1 EP0232772 B1 EP 0232772B1 EP 87100949 A EP87100949 A EP 87100949A EP 87100949 A EP87100949 A EP 87100949A EP 0232772 B1 EP0232772 B1 EP 0232772B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- amorphous
- boron
- starting components
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000003801 milling Methods 0.000 title description 2
- 239000000843 powder Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 27
- 229910052796 boron Inorganic materials 0.000 claims description 18
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 15
- 239000000956 alloy Substances 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 229910052726 zirconium Inorganic materials 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 8
- 229910052723 transition metal Inorganic materials 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 150000003624 transition metals Chemical class 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 5
- 239000011812 mixed powder Substances 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 229910052768 actinide Inorganic materials 0.000 claims description 3
- 150000001255 actinides Chemical class 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 150000001639 boron compounds Chemical class 0.000 claims description 2
- 239000010419 fine particle Substances 0.000 claims description 2
- 229910052752 metalloid Inorganic materials 0.000 description 10
- 238000005551 mechanical alloying Methods 0.000 description 9
- 150000002738 metalloids Chemical class 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000002074 melt spinning Methods 0.000 description 2
- 239000005300 metallic glass Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910002058 ternary alloy Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 229910005805 NiNb Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000005280 amorphization Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 239000013080 microcrystalline material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/006—Amorphous articles
- B22F3/007—Amorphous articles by diffusion starting from non-amorphous articles prepared by powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/002—Making metallic powder or suspensions thereof amorphous or microcrystalline
- B22F9/004—Making metallic powder or suspensions thereof amorphous or microcrystalline by diffusion, e.g. solid state reaction
- B22F9/005—Transformation into amorphous state by milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
Definitions
- the invention relates to a method for producing a powdery amorphous material, in which at least two powdery, at least partially crystalline, starting components are mechanically alloyed by means of a grinding process.
- a method for producing an amorphous alloy is e.g. in the publication "Applied Physics Letters", Vol. 43, No. 1, 1.12.1983, pages 1017 to 1019.
- Such amorphous alloys have a glass-like, amorphous structure instead of a crystalline one and have a number of extraordinary properties or combinations of properties, e.g. high wear or corrosion resistance, high hardness and tensile strength with good ductility as well as if necessary. special magnetic properties.
- microcrystalline materials with interesting properties can be produced (see e.g. DE-PS 28 34 425).
- a process which has been known for a long time for the industrial production of new materials is the so-called "mechanical alloying" (cf. for example "Metallurgical Transactions", vol. 5, August 1974, pages 1929 to 1934, or "Scientific American", vol. 234, 1976, Pages 40 to 48).
- powders of the starting elements or compounds of the desired alloy are ground together in a ball mill to form a mixed powder.
- the grinding process is carried out until a homogeneous alloy of the components involved has formed.
- the object of the present invention is now to design the method mentioned at the outset in such a way that it can also be used to produce amorphous metal-metalloid systems which contain boron as the metalloid using the method of mechanical alloying.
- the invention is based on the known fact that the application of the mechanical alloying method in a known manner does not lead to success when using boron powders. It has been shown that boron cannot be alloyed mechanically due to its great hardness. The advantages associated with the invention can thus be seen in particular in that, despite these difficulties, it is possible to produce amorphous materials from special metal-metalloid systems, it also being possible to add boron powder to the powdery starting components and to use the mechanical alloying process .
- the metal-metalloid systems are distinguished from metal-metal systems e.g. by a much higher hardness, but also by their special magnetic and corrosive properties, so that they are of particular importance with regard to their technical applications.
- the powdery starting components in elemental form or in the form of alloys or compounds can be provided for Mi and M 2 in general, the alloy M 1 , M 2 of which can be obtained in amorphous form by the known mechanical alloying.
- Mi and M 2 can in particular be transition metals such as Fe and Zr. Accordingly, a metallic glass made of a ternary alloy FeZrB is assumed as an exemplary embodiment.
- amorphous powder from this alloy powders of the two starting components Fe and Zr and B powder together with hardened steel balls are first placed in a suitable grinding bowl, the ratio of the three powder types of this powder mixture being determined by the predetermined resulting atomic concentration of the powder to be produced from these powders Material is determined.
- proportions (in atomic%) of the three components with 20 x x 4 80 and with 4 sy 30 30 are advantageously selected.
- a weight ratio of the three elementary powders can be provided which corresponds to FesoZr 2 oB 2 o after alloying.
- the size of the individual powders can be arbitrary; however, a similar size distribution of the two starting components involved is expedient in a range between 5 ⁇ m and 1 mm, preferably between 50 ⁇ m and 0.5 mm.
- the B powder should be as fine as possible, advantageously a size of the powder particles below 10 ⁇ m, preferably below 1 ⁇ m. This can be largely amorphous B powder.
- the three powders with the corresponding powder particle sizes are placed in a planetary ball mill (Fritsch brand: type "Pulverisette-5"), the steel balls of which, for example, have a diameter of 100 mm.
- the grinding intensity can be influenced as desired with a variation of the ball diameter and the number of balls.
- the grinding speed and the ratio of the steel balls to the amount of powder are further parameters which determine the grinding time required for amorphization.
- the mill's steel grinding container is kept under protective gas, for example under argon, and is only opened again after the grinding process has ended.
- protective gas for example under argon
- finely layered powder grains are formed, which consist of Fe and Zr layers.
- the B particles are embedded both at the Fe / Zr interfaces and in the elemental metals.
- this layer structure becomes finer and finer until amorphous FeZr is present at the end of the grinding process after about 10 to 30 hours, in or on the powder particles of which B-particles are incorporated or attached.
- the individual powder particles of the resulting mixed powder have a diameter of approximately 10 to 200 ⁇ m.
- the amorphous FeZr material thus formed which is an alloy component of the ternary alloy to be produced, has good thermal stability, so that annealing at temperatures up to 600 ° C. does not lead to crystallization. Accordingly, the mixed powder thus produced is subjected to an annealing treatment below the crystallization temperature of the amorphous alloy component FeZr from the two starting components Fe and Zr for a few hours. After about 4 hours at 600 ° C, the B atoms have diffused into the amorphous FeZr, whereby amorphous Fe 6 oZr zo Bzo has formed. The amorphicity of this powder formed in this way can be demonstrated by X-ray examinations.
- the powder of a metal-metalloid system produced in accordance with the invention in this way can then be further processed in a known manner to form a body or workpiece with the desired shape and dimension by compacting and, if appropriate, in further shaping steps.
- This body has the characteristic properties of the amorphous material, e.g. great strength at high temperatures.
- the method according to the invention explained on the basis of the exemplary embodiment described above is limited to alloys which consist of three or more components or elements. At least two of the metallic components must be able to be amorphized by mechanical alloying.
- the one starting component M 1 should be a late transition metal such as Fe, Ni, Co, Cu, Au, Re, Cr, Mn and the second starting component M 2 should be an early transition metal such as Zr, Ti, Hf, W, Nb, V, Mo or a rare earth metal or an actinide metal.
- the boron provided for the process according to the invention does not always have to be provided in elemental form, but can also be partially replaced by another metalloid such as Si, P, C, Ge, if necessary.
- the metalloid components are advantageously added in elemental form, and the boron can also be in amorphous form. In special cases, however, these elements can also be added in the form of alloys or compounds, such as intermetallic phases FezB or FeB.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Claims (9)
1. Procédé de préparation d'un matériau amorphe pulvérulent, qui consiste à allier mécaniquement, par un processus de broyage, au moins deux constituants pulvérulents de départ qui sont d'abord, au moins en partie, cristallins, caractérisé en ce qu'il consiste
- à ajouter aux poudres des constituants de départ un constituant pulvérulent au bore, en bore élémentaire ou en un composé de bore ou en un alliage de bore,
- à soumettre ensuite ce mélange de poudres au processus de broyage, en formant un constituant d'alliage amorphe à partir des constituants de départ, avec incorporation ou fixation de fines particules du constituant au bore,
- à soumettre enfin la poudre mixte ainsi formée à un traitement de recuit en dessous du point de cristallisation du constituant d'alliage amorphe, pour faire diffuser le bore dans le constituant d'alliage amorphe.
2. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à choisir des constituants de départ avec lesquels on peut former un système amorphe métal-métal.
3. Procédé suivant la revendication 2, caractérisé en ce qu'il consiste à choisir comme premier constituant de départ un métal du groupe des derniers métaux de transition de la classification périodique des éléments.
4. Procédé suivant les revendications 2 ou 3, caractérisé en ce qu'il consiste à choisir comme second constituant de départ un métal du groupe des premiers métaux de transition, des terres rares ou des actinides dans la classification périodique des éliminents.
5. Procédé suivant l'une des revendications 1 à 4, caractérisé en ce qu'il consiste à choisir des constituants de départ ayant des granulométries comprises entre 50 µm et 1 mm, et de préférence, entre 50 µm et 0,5 mm.
6. Procédé suivant l'une des revendications 1 à 5, caractérisé en ce qu'il consiste à mélanger un constituant pulvérulent au bore, ayant une granulométrie inférieure à 10 µm et, de préférence, inférieure à 1 µm.
7. Procédé suivant l'une des revendications 1 à 6, caractérisé en ce qu'il consiste à prévoir comme constituant de départ Fe et Zr, les proportions en pourcentage atomique des constituants de la poudre amorphe de composition (Feioo-xZrx)ioo-yBy satisfaisant aux relations:
20 ≤ x ≤ 80;
4 ≤ x ≤ 30.
8. Procédé suivant la revendication 7, caractérisé en ce qu'il consiste à broyer le mélange de poudres des constituants de départ et du constituant à base de bore, pendant au moins 10 heures, et de préférence entre 10 et 30 heures.
9. Procédé suivant la revendication 7 ou 8, caractérisé en ce qu'il consiste à effectuer un traitement de recuit entre 500°C et 600°C environ.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3603549 | 1986-02-05 | ||
| DE3603549 | 1986-02-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0232772A1 EP0232772A1 (fr) | 1987-08-19 |
| EP0232772B1 true EP0232772B1 (fr) | 1989-12-27 |
Family
ID=6293443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87100949A Expired EP0232772B1 (fr) | 1986-02-05 | 1987-01-23 | Procédé de préparation d'un matériau pulvérulent amorphe par un procédé de broyage |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4735770A (fr) |
| EP (1) | EP0232772B1 (fr) |
| JP (1) | JPS62185801A (fr) |
| DE (1) | DE3761255D1 (fr) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3763888D1 (de) * | 1986-03-27 | 1990-08-30 | Siemens Ag | Verfahren zur herstellung eines dauermagnetwerkstoffes aus pulverfoermigen ausgangskomponenten. |
| DE3714239C2 (de) * | 1987-04-29 | 1996-05-15 | Krupp Ag Hoesch Krupp | Verfahren zur Herstellung eines Werkstoffs mit einem Gefüge nanokristalliner Struktur |
| US4762677A (en) * | 1987-11-03 | 1988-08-09 | Allied-Signal Inc. | Method of preparing a bulk amorphous metal article |
| US4762678A (en) * | 1987-11-03 | 1988-08-09 | Allied-Signal Inc. | Method of preparing a bulk amorphous metal article |
| DE3741119A1 (de) * | 1987-12-04 | 1989-06-15 | Krupp Gmbh | Erzeugung von sekundaerpulverteilchen mit nanokristalliner struktur und mit versiegelten oberflaechen |
| DE3813224A1 (de) * | 1988-04-20 | 1988-08-25 | Krupp Gmbh | Verfahren zur einstellung feinstkristalliner bis nanokristalliner strukturen in metall-metallmetalloid-pulvern |
| US5383615A (en) * | 1989-10-03 | 1995-01-24 | The Australian National University | Ball milling apparatus |
| JPH0693301A (ja) * | 1992-09-16 | 1994-04-05 | Harumatsu Miura | 機械的エネルギー制御を用いたメカニカルアロイングによるアモルファス合金粉末の製造方法 |
| US5624475A (en) * | 1994-12-02 | 1997-04-29 | Scm Metal Products, Inc. | Copper based neutron absorbing material for nuclear waste containers and method for making same |
| DE10304849A1 (de) * | 2003-02-06 | 2004-08-19 | Institut für Neue Materialien gemeinnützige Gesellschaft mit beschränkter Haftung | Chemomechanische Herstellung von Funktionskolloiden |
| CN102328935B (zh) * | 2011-04-12 | 2012-11-28 | 西安交通大学 | 一种耐锌液腐蚀块体Fe2B化合物制备方法 |
| TWI581470B (zh) * | 2016-03-11 | 2017-05-01 | 國立臺灣科技大學 | 熱電結構 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3785801A (en) * | 1968-03-01 | 1974-01-15 | Int Nickel Co | Consolidated composite materials by powder metallurgy |
| US4126449A (en) * | 1977-08-09 | 1978-11-21 | Allied Chemical Corporation | Zirconium-titanium alloys containing transition metal elements |
| FI65274C (fi) * | 1982-06-14 | 1984-04-10 | Neste Oy | Foerfarande foer termisk krackning av kolvaeteolja |
| US4564396A (en) * | 1983-01-31 | 1986-01-14 | California Institute Of Technology | Formation of amorphous materials |
| US4640816A (en) * | 1984-08-31 | 1987-02-03 | California Institute Of Technology | Metastable alloy materials produced by solid state reaction of compacted, mechanically deformed mixtures |
| DE3515167A1 (de) * | 1985-04-26 | 1986-10-30 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur herstellung eines metallischen koerpers aus einer amorphen legierung |
| DE3518706A1 (de) * | 1985-05-24 | 1986-11-27 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Verfahren zur herstellung von formkoerpern mit verbesserten, isotropen eigenschaften |
| US4624705A (en) * | 1986-04-04 | 1986-11-25 | Inco Alloys International, Inc. | Mechanical alloying |
-
1987
- 1987-01-23 DE DE8787100949T patent/DE3761255D1/de not_active Expired - Fee Related
- 1987-01-23 EP EP87100949A patent/EP0232772B1/fr not_active Expired
- 1987-01-29 US US07/008,785 patent/US4735770A/en not_active Expired - Fee Related
- 1987-02-02 JP JP62022268A patent/JPS62185801A/ja active Granted
Non-Patent Citations (2)
| Title |
|---|
| CHEMICAL ABSTRACTS, Band 103, Nr. 17, 28. Oktober 1985, Seite 719, Zusammenfassung Nr. 152451f, Columbus, Ohio, US; & JP-A-60 91 601 (SUMITOMO SPECIAL METALS CO.) 23.05.1985 * |
| FRANKFURTER ZEITUNG:"Blick durch die Wirtschaft", 1.2.1984, Nr. 23, Seite 5 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0232772A1 (fr) | 1987-08-19 |
| US4735770A (en) | 1988-04-05 |
| DE3761255D1 (de) | 1990-02-01 |
| JPH0356281B2 (fr) | 1991-08-27 |
| JPS62185801A (ja) | 1987-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69025295T2 (de) | Amorphe Legierungen mit erhöhter Bearbeitbarkeit | |
| DE69014442T2 (de) | Amorphe Legierungen mit hoher mechanischer Festigkeit, guter Korrosionsbeständigkeit und hohem Formänderungsvermögen. | |
| DE69304231T2 (de) | Hochfeste Aluminiumlegierung | |
| DE68907837T2 (de) | Hochfeste Legierungen auf Magnesiumbasis. | |
| DE3935698C2 (de) | Legierungstarget für die Herstellung eines magneto-optischen Aufzeichnungsmediums | |
| DE3687680T2 (de) | Verwendung polykristalliner magnetischer substanzen zur magnetischen abkuehlung. | |
| EP2209621B1 (fr) | Procédé de production d'un élément de palier lisse présentant une couche de glissement contenant du bismuth, et élément de palier lisse | |
| EP0232772B1 (fr) | Procédé de préparation d'un matériau pulvérulent amorphe par un procédé de broyage | |
| DE4408114B4 (de) | Magnetisches Material | |
| DE3035433A1 (de) | Ferromagnetische amorphe legierung | |
| EP0200079B1 (fr) | Préparation d'une ébauche métallique d'un alliage amorphe | |
| DE60029364T2 (de) | Automatenlegierung | |
| DE19814441B4 (de) | Permanentmagnet-Material und Verbundmagnet | |
| DE69318682T2 (de) | Magnetpulver vom Typ SE-Fe-B, Sintermagnete daraus und Herstellungsverfahren | |
| EP0213410B1 (fr) | Procédé de préparation d'une ébauche métallique en un alliage amorphe avec des composants au moins partiellement magnétiques | |
| EP0502397B1 (fr) | Procédé de fabrication d'un matériau magnétiquement doux à base de fer à haute magnétisation de saturation et à structure de graines ultrafine | |
| EP0988124B1 (fr) | Procede et poudre pour la production de modeles fonctionnels metalliques | |
| EP0243641B1 (fr) | Procédé de préparation d'un matériau à propriété magnétique permanente à partir de poudre | |
| DE69218109T2 (de) | Verdichtete und verfestigte Wirkstoffe aus Aluminium-Legierung | |
| EP0016961B1 (fr) | Procédé de fabrication d'un matériau composite à base de fibres supraconductrices par métallurgie des poudres | |
| DE2137650A1 (de) | Carbid Metall Verbundstoff und Ver fahren zu dessen Herstellung | |
| DE69308402T2 (de) | Hochfestige Legierung auf Aluminiumbasis und verdichteter und verfestigter Werkstoff daraus | |
| DE3709138C2 (de) | Verfahren zur Herstellung eines magnetischen Werkstoffes aus pulverförmigen Ausgangskomponenten | |
| DE10117657A1 (de) | Komplex-Borid-Cermet-Körper, Verfahren zu dessen Herstellung und Verwendung dieses Körpers | |
| DE2033100A1 (de) | Dispersionen von Nitriden in einem Metall oder einer Legierung und Verfahren zu deren Herstellung |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| 17P | Request for examination filed |
Effective date: 19870925 |
|
| 17Q | First examination report despatched |
Effective date: 19880423 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
| REF | Corresponds to: |
Ref document number: 3761255 Country of ref document: DE Date of ref document: 19900201 |
|
| ET | Fr: translation filed | ||
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19921222 Year of fee payment: 7 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19930121 Year of fee payment: 7 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19940123 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19940123 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19940930 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19950321 Year of fee payment: 9 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19961001 |