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WO2009062769A1 - Poudre métallique - Google Patents

Poudre métallique Download PDF

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Publication number
WO2009062769A1
WO2009062769A1 PCT/EP2008/062037 EP2008062037W WO2009062769A1 WO 2009062769 A1 WO2009062769 A1 WO 2009062769A1 EP 2008062037 W EP2008062037 W EP 2008062037W WO 2009062769 A1 WO2009062769 A1 WO 2009062769A1
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WO
WIPO (PCT)
Prior art keywords
less
metal powder
tungsten
ppm
powder
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.)
Ceased
Application number
PCT/EP2008/062037
Other languages
German (de)
English (en)
Inventor
Ronald Stief
Thomas Furche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HC Starck GmbH
Original Assignee
HC Starck GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HC Starck GmbH filed Critical HC Starck GmbH
Publication of WO2009062769A1 publication Critical patent/WO2009062769A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/062—Fibrous particles
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/068—Flake-like particles
    • 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
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
    • B22F9/26—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/08—Metallic material containing only metal elements
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • Rhenium is a refractory, which has a high melting point of 3180 0 C and a high elastic modulus. Rhenium components can undergo repeated heating and cooling cycles without significant mechanical damage. For these and other reasons, rhenium is often used in rocket nozzles and other thermally highly resilient parts. Usually complex components made of rhenium are produced by mechanical processing, which is complicated and expensive, which is why a need for near net shape sintered components of rhenium and its
  • alloys having a low rhenium content and a high content of tungsten metal are advantageous for the production of x-rayed clay hearths.
  • US 6551377 shows a process for producing spherical tungsten-rhenium alloy powders in a plasma flame to obtain spherical powders.
  • US 3623860 shows a process for producing tungsten-rhenium alloy powders wherein solutions of tungsten and rhenium salts are atomized and reduced in the hydrogen stream.
  • the atomization conditions are set, resulting in a high risk of contamination of the resulting alloy powder, or the methods do not provide a possibility to ensure a homogeneous distribution of the rhenium in the alloy particles, so that biphasic particles or a powder mixture of rhenium and tungsten particles are obtained. It was therefore the object of the present invention to provide a simple process for the production of high-purity, single-phase tungsten-rhenium alloy powders with homogeneous distribution of the alloy constituents in the individual particles, which allows high flexibility for adjusting the particle size distributions at the end of the process.
  • This object is achieved by a method for producing a metal powder consisting of 3% by weight to 15% by weight of rhenium and ad 100% by weight of tungsten, having less than 200 ppm of metallic impurities, a homogeneous distribution of rhenium and tungsten and consisting of non-spherical particulate, pinciform, acicular or flake-like particles, comprising the steps of: drying ammonium perrhenate
  • the drying of Ammoniumperrhenates is essential because it easily absorbs moisture from the air and accurate weighing is not possible.
  • the ammonium perrhenate is preferably used in a slight excess of from 1 mol% to 3 mol%.
  • the amount of ammonium perrhenate required is determined according to the rhenium content of the ammonium perrhenate and the desired rhenium content of the powder.
  • the drying can be carried out by conventional means, for example by drying at a temperature of 50 0 C to 110 0 C, preferably 65 ° C to 85 0 C, in particular 7O 0 C to 80 0 C, at atmospheric pressure or under reduced pressure for a time from about 2 to 20 hours, especially 3 to 10 hours or from 4 to 6 hours. In general, drying at normal pressure and a temperature of about 70 ° C. is sufficient for 3 to 5 hours, advantageously passing a gas stream through the drying device to remove the moisture.
  • the required amount of ammonium perrhenate is weighed and mixed with a maximum of 60% of the desired amount of tungsten tungsten powder.
  • the dried ammonium perrhenate and the tungsten powder can advantageously be mixed and screened off in customary devices, for example a stainless steel vessel.
  • the mixture is then mixed in an intensive mixer for 5 to 30 minutes, advantageously 10 to 20 minutes, and the first powder mixture is obtained.
  • the remaining amount of tungsten powder is then added and further mixed again for 10 to 40 minutes, especially 15 to 30 minutes, to obtain the second powder mixture.
  • the resulting second powder mixture is then pressed in a hydraulic press with a holding time of 1 to 60 seconds, in particular 3 to 10 seconds, and a compression pressure of 40 to 80 tons, preferably 50 to 60 tons, to form bodies. These shaped bodies are then sintered and reduced simultaneously in a hydrogen atmosphere. This step is carried out at a temperature of 700 0 C to 2000 0 C, advantageously at 1100 0 C to 2000 0 C, in particular at 1300 0 C to 1900 0 C.
  • This process step is carried out at atmospheric pressure at a hydrogen flow of about 1 to 4 m 3 / hour, advantageously at 1, 5 to 2 m 3 / h, so that in the reduction resulting water vapor is removed by the hydrogen stream.
  • the Haitezeit at the specified temperature is 3 to 8 hours, preferably 5 to 6 hours.
  • a stepwise heating wherein first heated within 60 to 120 minutes, in particular 80 or 90 to 100 minutes at 600 0 C to 800 ° C, in particular 68O 0 C to 72O 0 C and about 30 to 90 minutes, in particular 50 to 70 minutes at this temperature is maintained.
  • the cooling is allowed after switching off the furnace, this step advantageously also takes place in a stream of hydrogen or an inert gas such as helium, neon or nitrogen or any other gas to one to prevent possible oxidation or other reaction such as gas absorption during cooling.
  • an inert gas such as helium, neon or nitrogen or any other gas
  • the resulting sintered pieces are crushed, for example in a jaw crusher, so that advantageously pieces with a size of less than 3 mm are obtained.
  • This can be done by screening with a sieve of mesh size of about 3 mm and breaking the coarse fraction again.
  • the resulting fragments are ground, preferably in a screen ball mill using spherical or cylindrical steel or, advantageously, tungsten steel bodies.
  • the mesh size of the screen coverings used is selected according to the desired particle size distribution.
  • the fine powder can first be sieved off before a subsequent grinding step, so that only the particles which are larger than the sieve covering used in the subsequent grinding step are reground.
  • the powder obtained can be ground again in a counter-jet mill, for example a fluidized bed counter-jet mill, to obtain even finer powders. In this case, particle sizes of less than 15 microns can be achieved.
  • the tungsten-rhenium powder obtained in a first cleaning step, preferably in a plastic ceramic or glass container, in conc. Hydrochloric acid and stirred.
  • the temperature of the hydrochloric acid is 30 0 C to 80 0 C, advantageously 40 0 C to 70 0 C, in particular 50 0 C to 60 0 C, wherein the addition is such that the gas evolution is not too strong.
  • the temperature must not be too high, since the solubility of the hydrogen chloride then decreases and the concentration of the acid decreases.
  • the reaction rate is too low to achieve dissolution of the iron-containing impurities in a short time.
  • the powder is allowed to sediment at the selected temperature for 4 to 30 hours, advantageously 6 to 24 hours, in particular 8 to 18 hours, and the hydrochloric acid is then decanted off, in a second purification step then likewise Hydrochloric acid heated to 30 0 C to 80 0 C was added and stirred again for 30 to 120 minutes.
  • the hydrochloric acid is filtered off and the Füter Wegstand acid-free washed with distilled water, ie it is washed until no more hydrochloric acid is detectable in the filtrate. Then the residue of filtration is (also in a glass or ceramic vessel) dried, advantageously at less than 7O 0 C, especially at 30 to 50 ° C, being possible to work under reduced pressure and / or in a gas stream optional. Subsequently, lumps possibly formed can be dissolved by further screening.
  • the filtrate of the second purification step can be reused in the first purification step, but care must be taken that at least the hydrochloric acid used in the second purification step has a higher purity.
  • a more than three-time use of the hydrochloric acid in the first cleaning step does not lead to the desired cleaning effect.
  • the ratio (by weight) of tungsten-rhenium powder to hydrochloric acid is about 6 to 9 to 1, in particular 8 to 8.5 to 1 in the first purification step, in the second purification step, the same or a slightly lower addition of hydrochloric acid, such as 10 to 10.5 to 1, can take place.
  • a further process step can be carried out, regardless of how the tungsten-rhenium powder was ground or post-purified.
  • This reduction of the oxygen content is possible by a heat treatment of the obtained powder under reduced pressure.
  • the tungsten-rhenium powder is heated to a temperature of 1000 0 C to 1200 0 C, preferably 1050 0 C to 1150 0 C, the pressure less than 100 mbar, advantageously less than 50 mbar, in particular less than 15 mbar or less than 10 or 5 mbar. Under these conditions, the powder is heat-treated for 3 to 8 hours, especially 4 to 6 hours under reduced pressure.
  • the tungsten-rhenium Puiver Heat treatment under reduced pressure, the tungsten-rhenium Puiver reheated under reduced pressure under a hydrogen atmosphere.
  • the pressure in this step is less ais 10 mbar, advantageously less than 5 mbar, in particular less than 3 mbar Under these conditions, is heated to a temperature of 1000 0 C to 1200 0 C 1 advantageously 1050 ° C to 115o 0 C, and the temperature maintained for 3 to 8 hours, especially 4 to 6 hours. After cooling, any lumps that may be formed may be dissolved by further sieving.
  • the Sauerstoffgehait of the tungsten-rhenium powder is after completion of both steps for oxygen reduction is less than 400 ppm, advantageously less than 250 ppm, especially less than 100 ppm or 80 ppm f in particular less than 50 ppm.
  • the high purity of the powders according to the invention is advantageous to ensure by the process described above, when it is carried out under clean room conditions.
  • the room air is filtered with a dust filter F5 or the like, so that dust particles with a particle size of more than 12 microns to 100%, with a size of 10 microns to 50% and with a particle size of 0.5 microns to 15% retained.
  • the room is equipped with a lock to enter to prevent contamination, and only tungsten and rhenium are processed in this so-equipped room.
  • the metal powder according to the invention is thus a highly pure Woifram rhenium powder.
  • This metal powder consisting of 3 wt .-% to 15 wt .-% rhenium and ad 100 wt .-% tungsten, which has less than 200 ppm metallic impurities, a homogeneous distribution of rhenium and tungsten and from non-spherical particles with spratziger , pinciform, needle-shaped or flake-shaped.
  • the metal powder according to the invention has a uniform, uniform distribution of rhenium and tungsten, so that the individual particles of rhenium and tungsten, in which the alloying constituents are homogeneously mixed with each other and thus no discrete, X-ray detectable phases, such as ⁇ -ReW, ⁇ - form ReaW 3 or pure Re phases.
  • the metal powder according to the invention is thus a high-purity metal powder consisting of 3% by weight to 15% by weight of rhenium and ad 100% by weight of tungsten, which is less than 200 ppm metallic
  • rhenium is in the form of a WRe mixed crystal with tungsten structure.
  • no powder mixture of tungsten and rhenium particles before but advantageous are less than 0.1 wt .-% pure rhenium or wolf rampart.
  • the metal powder according to the invention does not vary on an area of 200 ⁇ m 2 the rhenium concentration by more than 15%, advantageously not more than 5%.
  • the metal powder has an oxygen content of less than 400 ppm, advantageously less than 250 ppm, in particular less than 100 ppm or 80 ppm, in particular less than 50 ppm.
  • the carbon content of the metal powder is less than 50 ppm, in particular less than 30 ppm.
  • the iron content is less than 50 ppm.
  • the contents of nickel, cobalt, copper, manganese or calcium are independently of one another and independently of the carbon or oxygen content less than 50 ppm, advantageously less than 20 ppm, in particular less than 10 ppm.
  • the contents of titanium and zirconium are independently less than 40 ppm, advantageously less than 20 ppm, in particular less than 10 ppm.
  • the average particle size distribution of the powder is less than 25 ⁇ m, D50 is less than 40 ⁇ m and D90 is less than 55 ⁇ m or the average particle size distribution D10 is less than 5 ⁇ m, D50 is less than 9 ⁇ m and D90 is less than 13 ⁇ m.
  • the particle size distribution is advantageously monomodal.
  • the obtained tungsten-rhenium powder is excellently suitable for vacuum plasma spray coating processes.
  • the suitable wells are particularly resilient in high temperature vacuum applications such as X-ray active layer on X-ray rotary anode plates.
  • the present invention therefore also relates to processes for the production of moldings, wherein the above-described metal powder according to the invention is applied by a vacuum plasma spraying process, in particular the production of X-ray divider dividers, the available molding and the use of metal powder according to the invention for vacuum plasma spraying and for the production of X-ray rotary anode denticles.
  • Ammonium perrhenate for producing a tungsten-rhenium metal powder mixed with a rhenium content of 10% was dried for 4 hours at 7O 0 C before weighing, passed in portions with twice the amount (by weight) of tungsten grinding media through a sieve with a mesh size of 0.04 mm and again for 4 hours at 70 0 C. dried. 60% of the tungsten powder was weighed and mixed with the total amount of ammonium perrhenate, in portions through a Stirlsieb with a
  • Example 1 The powder obtained in Example 1 was ground with tungsten grinding media in a sieve ball mill with a mesh of 0.04 mm and then further ground and simultaneously screened in an Alpine AFG 100 fluidized bed counter-jet mill. From this powder then 35kg of the fraction were taken 2-15 microns and in a beaker (portions of 5 kg) with KPG stirrer containing hydrochloric acid at 55 ° C, added in portions with a PVC spoon and about 10 minutes stirred with the KPG stirrer.
  • the procedure was as in Examples 1 and 2, but adjusted the amounts of tungsten and rhenium so that the rhenium content was 5%.
  • the powders had a tungsten content of 95% by weight and a rhenium content of 5% by weight in the chemical analysis.
  • X-ray diffractometry only reflections for tungsten were found, but no reflections indicating a rhenium lattice or ⁇ - or ⁇ -phase.
  • Comparative Examples 6 and 7 It was as in Example Be! 3 method and a tungsten-rhenium powder obtained with a rhenium content of 5%. It was not worked under clean room conditions and in premises in which other metals were processed powder metallurgy.
  • X-ray active layers were sprayed on X-ray rotary anode splitters by means of vacuum plasma spraying (VPS).
  • VPS vacuum plasma spraying
  • the powders according to the invention had no reflections indicating the presence of a rhenium metal lattice, although rhenium was detectable in the powder particles. This means that there are no or only very few pure rhenium particles present and that the existing rhenium in the form of a mixed crystal was present in tungsten.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

L'invention concerne une nouvelle poudre de métal réfractaire qui présente moins de 200 ppm d'impuretés métalliques et une répartition homogène, et qui est constituée de particules non sphériques de forme irrégulière, en plaquettes, en aiguilles ou en éclats. L'invention concerne également un procédé pour sa fabrication ainsi que son utilisation.
PCT/EP2008/062037 2007-11-14 2008-09-11 Poudre métallique Ceased WO2009062769A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007054665.5 2007-11-14
DE102007054665.5A DE102007054665B4 (de) 2007-11-14 2007-11-14 Metallpulver und Verfahren zur Herstellung des Metallpulvers

Publications (1)

Publication Number Publication Date
WO2009062769A1 true WO2009062769A1 (fr) 2009-05-22

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PCT/EP2008/062037 Ceased WO2009062769A1 (fr) 2007-11-14 2008-09-11 Poudre métallique

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WO (1) WO2009062769A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014214A3 (fr) * 2011-07-25 2013-06-13 Eckart Gmbh Procédé de revêtement mettant en oeuvre des matériaux de revêtement pulvérulents spéciaux et utilisation de tels matériaux de revêtement
CN108568529A (zh) * 2018-05-18 2018-09-25 海安南京大学高新技术研究院 球形Fe-Ni合金粉末的制备方法
CN110142415A (zh) * 2019-07-01 2019-08-20 北京工业大学 一种氧化物掺杂多合金相钨铼合金粉及制备方法
CN110396630A (zh) * 2019-09-06 2019-11-01 湖南铼因铼合金材料有限公司 钨铼铜合金及其制备方法、钨铼铜合金杆及其制备方法和针状电极
CN113894289A (zh) * 2021-09-30 2022-01-07 合肥工业大学 一种低氧含量的纳米钨铼粉末制备方法
CN117026051A (zh) * 2023-09-20 2023-11-10 中南大学 一种钨钽铼镍铁合金及其制备方法和应用
CN119501085A (zh) * 2024-09-09 2025-02-25 江西铜业集团有限公司 一种钨铼合金球形颗粒的制备方法

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WO2002090022A1 (fr) * 2001-03-19 2002-11-14 Rhenium Alloys, Inc. Poudre de rhenium spherique

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US4390368A (en) * 1981-04-01 1983-06-28 Gte Products Corporation Flame spray powder
EP0326861A1 (fr) * 1988-01-30 1989-08-09 H.C. Starck GmbH & Co. KG Poudre métallique composite agglomérée, son procédé de préparation et son utilisation
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014214A3 (fr) * 2011-07-25 2013-06-13 Eckart Gmbh Procédé de revêtement mettant en oeuvre des matériaux de revêtement pulvérulents spéciaux et utilisation de tels matériaux de revêtement
CN103827346A (zh) * 2011-07-25 2014-05-28 埃卡特有限公司 使用特殊粉末涂料材料的涂布方法以及这种涂料材料的用途
JP2014521836A (ja) * 2011-07-25 2014-08-28 エッカルト ゲゼルシャフト ミット ベシュレンクテル ハフツング 特殊粉末化コーティング物質を使用するコーティング方法、およびそのようなコーティング物質の使用
US9580787B2 (en) 2011-07-25 2017-02-28 Eckart Gmbh Coating method using special powdered coating materials and use of such coating materials
CN108568529A (zh) * 2018-05-18 2018-09-25 海安南京大学高新技术研究院 球形Fe-Ni合金粉末的制备方法
CN110142415A (zh) * 2019-07-01 2019-08-20 北京工业大学 一种氧化物掺杂多合金相钨铼合金粉及制备方法
CN110396630A (zh) * 2019-09-06 2019-11-01 湖南铼因铼合金材料有限公司 钨铼铜合金及其制备方法、钨铼铜合金杆及其制备方法和针状电极
CN113894289A (zh) * 2021-09-30 2022-01-07 合肥工业大学 一种低氧含量的纳米钨铼粉末制备方法
CN117026051A (zh) * 2023-09-20 2023-11-10 中南大学 一种钨钽铼镍铁合金及其制备方法和应用
CN119501085A (zh) * 2024-09-09 2025-02-25 江西铜业集团有限公司 一种钨铼合金球形颗粒的制备方法

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