US3418103A - Process for making tungsten and molybdenum alloys - Google Patents
Process for making tungsten and molybdenum alloys Download PDFInfo
- Publication number
- US3418103A US3418103A US417800A US41780064A US3418103A US 3418103 A US3418103 A US 3418103A US 417800 A US417800 A US 417800A US 41780064 A US41780064 A US 41780064A US 3418103 A US3418103 A US 3418103A
- Authority
- US
- United States
- Prior art keywords
- tungsten
- nickel
- copper
- refractory
- molybdenum
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 24
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 21
- 239000010937 tungsten Substances 0.000 title claims description 18
- 229910001080 W alloy Inorganic materials 0.000 title description 8
- 229910001182 Mo alloy Inorganic materials 0.000 title description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 28
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 229910052759 nickel Inorganic materials 0.000 claims description 13
- 229910052721 tungsten Inorganic materials 0.000 claims description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical class [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 239000011733 molybdenum Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910002065 alloy metal Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 description 16
- 229910052802 copper Inorganic materials 0.000 description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 239000000843 powder Substances 0.000 description 13
- 239000013078 crystal Substances 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 4
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- OWUGOENUEKACGV-UHFFFAOYSA-N [Fe].[Ni].[W] Chemical compound [Fe].[Ni].[W] OWUGOENUEKACGV-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- NBFQLHGCEMEQFN-UHFFFAOYSA-N N.[Ni] Chemical class N.[Ni] NBFQLHGCEMEQFN-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- ITZSSQVGDYUHQM-UHFFFAOYSA-N [Ag].[W] Chemical compound [Ag].[W] ITZSSQVGDYUHQM-UHFFFAOYSA-N 0.000 description 1
- LTOKVQLDQRXAHK-UHFFFAOYSA-N [W].[Ni].[Cu] Chemical compound [W].[Ni].[Cu] LTOKVQLDQRXAHK-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- QKSIFUGZHOUETI-UHFFFAOYSA-N copper;azane Chemical compound N.N.N.N.[Cu+2] QKSIFUGZHOUETI-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003657 tungsten Chemical class 0.000 description 1
- 150000003658 tungsten compounds Chemical class 0.000 description 1
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 description 1
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- 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
Definitions
- This process relates to a new method for the production of tungsten and molybdenum co-reduced metal powders for use by the refractory metal fabricating industry in producing parts via standard compacting and sintering techniques.
- the process has in its scope, applicability to the combination and/or alloying in any quantitative relationship elements as tungsten and/or molybdenum plus nickel, copper, iron, silver, uranium, etc. or any desired elements that can be reduced to their metallic state from either their soluble salts or from one of their oxides in a hydrogen atmosphere between 700 degrees centigrade and 1100 degrees centigrade.
- tungsten alloys are at present being produced by industry in important quantities. Alloys of tungsten, nickel, and copper, known and marketed under individual trade names, but generally referred to as heavy.
- alloys are used I as weighting devices, gyrorotors, flywheels, in radiation shielding, etc. They are also being employed on some of our most advanced missile systems.
- Tungsten-copper and tungsten-silver combinations are used in important quantities as electrical contact and welding materials.
- Tungsten-nickel, tungsten-nickel-iron and tungsten molybdenum, combinations have been under intense investigation for missile and atomic energy applications for some years. f
- my process provides 'a method for the metallic elements to be combined with tungsten or molybdenum in either of two ways: t (l) Blending at the atomic level, by providing an aqueous solution of all of the metallic elements in soluble compound form, and co-precipitating them prior to coreduction in hydrogen.
- the final dried salt will then contain tungsten, nickel and copper in the 90%5%5% proportion.
- This combined salt is then co-reduced in a hydrogen atmosphere, and by control of material bed depth, hydrogen flow, and moisture content, temperatures, and furnace residence time, the combined alloy powder is produced to the desired particle size, distribution density, etc.
- One such example might be a tungsten-iron-nickel al- 10y. powder.
- the salts used might be either ammonium para tungstate crystals, or ammonium tungstate solution plus either organic iron and nickel salts (formate, citrate, etc.) or iron and nickel nitrate.
- Proper choice of solvent would be either pure water or dil. or concentrated aqueous ammonia.
- tungstenmolybdenum alloy powder in any proportion such as %W-15Mo, 50W-50Mo.
- ammonium solution of silver in the form of its nitrate salt can be dissolved, blended and evaporated onto either tungstic acid,
- a method of producing an alloy powder of 5% nickel, 5% copper and 90% refractory comprising the steps vof: introducing an aqueous solution of nickel and copper to a dry salt of said refractory; coating refractory particles by continuous blending and evaporation of the said aqueous solution,
- said refractory selected from the group consisting of tungsten and molybdenum; and the step of coreduction to the alloy metal powder by use of hydrogen or carbon.
- a method of producing a homogenous alloy powder of a refractory metal-nickcl-copper comprising the steps of introducing an aqueous solution consisting of nickel and copper which decomposes at an elevated temperature to a dry salt of refractory metal crystals selected from the group consisting of tungsten and molybdenum, coating said refractory metal crystals with said nickel and said copper by continuous blending and evaporation of and co-reducing said coated particles in a reducing atmosphereat a temperature of about 700 to 1100 C., thereby producing a homogenous pow der alloy of a refractory metal-nickel-copper.
- a method of producing a homogenous alloy powder of a refractory metal-nickel-copper comprising the steps of introducing an aqueous solution consisting of nickel and copper ammonia complex which decomposes at an elevated temperature to a dry salt of tungsten crystals selected from the group consisting of ammonium para tungstate and ammonium tungstate, coating said tungsten crystals with said nickel and said copper by continuous blending and evaporation of said aqueous solution, and co-reducing said coated particles in a reducing atmosphere of hydrogen at a temperature of about 700 to 1100 C. thereby producing a homogenous powder alloy of tungsten-nickel-copper.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Description
United States Patent 3,418,103 PROCESS FOR MAKING TUNGSTEN AND MOLYBDENUM ALLOYS Lloyd Ivan Lasdon, Scarsdale, N.Y., assignor. to P. R.
Mallory & 'Co. Inc., Indianapolis, Ind., a corporation of Delaware No Drawing. Continuation of application Ser. No.
132,306, Aug. 8, 1961. This application Dec. 11,
1964, Ser. No. 417,800
3 Claims. (Cl. 75-.5)
This application is filed as a continuation of application Ser. No. 132,306 filed Aug. 8, 1961, and now abandoned.
This process relates to a new method for the production of tungsten and molybdenum co-reduced metal powders for use by the refractory metal fabricating industry in producing parts via standard compacting and sintering techniques. I
The process has in its scope, applicability to the combination and/or alloying in any quantitative relationship elements as tungsten and/or molybdenum plus nickel, copper, iron, silver, uranium, etc. or any desired elements that can be reduced to their metallic state from either their soluble salts or from one of their oxides in a hydrogen atmosphere between 700 degrees centigrade and 1100 degrees centigrade.
Currently, there is a great deal of development effort being expended in advanced technological areas on tungsten and molybdenum alloys fabricated by powder metallurgical techniques and in many cases in these alloys difficulties are being encountered that can be attributed to lack of suflicient density, uniformity of physical properties, and inconsistent chemical analysis in different areas of individual pieces, and the inability to provide reproducibility of characteristics in different lots.
Commercially, tungsten alloys are at present being produced by industry in important quantities. Alloys of tungsten, nickel, and copper, known and marketed under individual trade names, but generally referred to as heavy.
alloys are used I as weighting devices, gyrorotors, flywheels, in radiation shielding, etc. They are also being employed on some of our most advanced missile systems.
Tungsten-copper and tungsten-silver combinations are used in important quantities as electrical contact and welding materials.
Tungsten-nickel, tungsten-nickel-iron and tungsten molybdenum, combinations have been under intense investigation for missile and atomic energy applications for some years. f
Under existing processes, most of the above described alloys and metal combinations are produced by either intimately, mechanically blending the elements in fine metal owder form in their proper proportions prior to compacting and sintering, or by blending the fine oxides of the desired constituent metallic elements and by co-re- .ducing them in hydrogen atmosphere.
These methods provide, prior to sintering Where true alloys are formed, and generally Where they are not, mixtures of individual metal particles which may or may not be completely uniform throughout a given finished part. Furthermore based upon the facts that the two or more metal powders will have dilferent densities and almost always considerable differences in their particle size distributions, they tend to segregate on handling, prior to compacting. Individual pieces therefore, whether they form alloys or not, generally have inherent variations in structure.
In some areas where alloys between tungsten and molybdenum and the other constituent elements do not exist, combination commercially by a technique of infiltration is practiced, whereby a skeletal matrix of the re- "ice fractory metal is formed, filled with the liquid phase of the other element, then permitted to cool. Here again, lack of uniformity throughout a part occurs because of lack of uniformity of the skeletal matrix, and the natural resistance to penetration of the liquid phase element that some impurities impart. In addition, the same problem.
exists in some cases as with the previously described two processes, wherein the material is no more than a mixtureof crystals of the elements rather than the potentially more homogenous mixture would be at the atomic level.
Generally speaking, my process provides 'a method for the metallic elements to be combined with tungsten or molybdenum in either of two ways: t (l) Blending at the atomic level, by providing an aqueous solution of all of the metallic elements in soluble compound form, and co-precipitating them prior to coreduction in hydrogen.
(2) Coating of a precipitated or crystallized tungsten compound with the desired additive elements in aqueous solution with combined blending and drying followed by co-reduction.
(1) In the particular case where it is desired to produce an alloy of tungsten containing 5% nickel and 5% copper.
(a) By the use of our first process; to an ammoniumtungstate solution containing a given calculated amount of tungsten we add the theoretical quantity of copper and nickel in a solution prepared by dissolving their soluble salts (such as their nitrates) in pure aqueous ammonia. Soluble copper and nickel ammonia complexes are formed.
This total mixture is then evaporated with continuous agitation until crystallization is complete. The final dried salt will then contain tungsten, nickel and copper in the 90%5%5% proportion.
This combined salt is then co-reduced in a hydrogen atmosphere, and by control of material bed depth, hydrogen flow, and moisture content, temperatures, and furnace residence time, the combined alloy powder is produced to the desired particle size, distribution density, etc.
(b) In producing the same alloy as in Example 1 by the second process described; dry ammonium para-tungstate crystals (produced by standard existing techniques) of 99.9+% purity and fine particle size is weighed and calculated to a given quantity of tungsten. Into a steam jacketed blender a solution of nickel and copper pre pared as described in Example In containing the desired calculated quantities of each is added in addition to the dry tungsten salt. This mixture is then blended and evaporated slowly to dryness. The finished dry material then consisting of individual tungsten crystals coated with nickel and copper in the proper proportions is then coreduced as in Example 1. v
In a similar fashion as above provided, if it is desired to produce tungsten and/or molybdenum alloys containing other elements then those described soluble salts must first be found that are compatible; that do not volatilize in the high reduction temperatures (but rather decompose); that are economically practical and that are not significantly corrosive to the alloys of furnace construction.
One such example might be a tungsten-iron-nickel al- 10y. powder. The salts used might be either ammonium para tungstate crystals, or ammonium tungstate solution plus either organic iron and nickel salts (formate, citrate, etc.) or iron and nickel nitrate. Proper choice of solvent would be either pure water or dil. or concentrated aqueous ammonia.
Another example would be the production of tungstenmolybdenum alloy powder in any proportion such as %W-15Mo, 50W-50Mo. The ammonium solution of Again, silver in the form of its nitrate salt can be dissolved, blended and evaporated onto either tungstic acid,
oxide-ammonium tungstate molybdic oxide or ammonium molybdate in desired proportion.
With the processes described above, individual partices of the uncombined elements cannot exist. Homogeniety is assured by the fact that segregation cannot occur since each particle or crystal of metal to be compacted is in itself the desired combination of elements. Evaluation work done on samples of tungsten and molybdenum alloy powders prepared in the above manner. over the past two years have shown the following:
(1) Simplification of fabrication processes for these materials providing (more in the case of the coating process) economic advantages.
(2) Much greater uniformity of structure providing superior physical properties. I
(3) The greater ability in some cases to reach higher densities with lower sintering temperatures and shorter furnacing times.
(4) Greater machinability based upon variations in hardness, density, etc. i
(5) The ability to confer consistency and uniformity to large runs of similar parts. These processes can provide very large uniform lots which can be sampled and analyzed with greater significance than with existing processes.
It is apparent to those skilled in the art that various the elimination of changes and modifications may be made herein without departing from the spirit of the invention or from the scope of the appended claims.
I claim:
1. A method of producing an alloy powder of 5% nickel, 5% copper and 90% refractory comprising the steps vof: introducing an aqueous solution of nickel and copper to a dry salt of said refractory; coating refractory particles by continuous blending and evaporation of the said aqueous solution,
solution, said refractory selected from the group consisting of tungsten and molybdenum; and the step of coreduction to the alloy metal powder by use of hydrogen or carbon. t
2. A method of producing a homogenous alloy powder of a refractory metal-nickcl-copper comprising the steps of introducing an aqueous solution consisting of nickel and copper which decomposes at an elevated temperature to a dry salt of refractory metal crystals selected from the group consisting of tungsten and molybdenum, coating said refractory metal crystals with said nickel and said copper by continuous blending and evaporation of and co-reducing said coated particles in a reducing atmosphereat a temperature of about 700 to 1100 C., thereby producing a homogenous pow der alloy of a refractory metal-nickel-copper.
3. A method of producing a homogenous alloy powder of a refractory metal-nickel-copper comprising the steps of introducing an aqueous solution consisting of nickel and copper ammonia complex which decomposes at an elevated temperature to a dry salt of tungsten crystals selected from the group consisting of ammonium para tungstate and ammonium tungstate, coating said tungsten crystals with said nickel and said copper by continuous blending and evaporation of said aqueous solution, and co-reducing said coated particles in a reducing atmosphere of hydrogen at a temperature of about 700 to 1100 C. thereby producing a homogenous powder alloy of tungsten-nickel-copper.
References Cited UNITED STATES PATENTS 1,829,635 10/1931 Davey 75-55 2,410,717 11/1946 Cox 75--l76 L. DEWAYNE RUTLEDGE, Primary Examiner. WAYLAND W. STALLARD, Assistant Examiner.
Claims (1)
1. A METHOD OF PRODUCING AN ALLOY POWDER OF 5% NICKEL, 5% COPPER AND 90% REFRACTORY COMPRISING THE STEPS OF: INTRODUCING AN AQUEOUS SOLUTION OF NICKEL AND COPPER TO A DRY SALT OF SAID REFRACTORY; COATING REFRACTORY PARTICLES BY CONTINUOUS BLENDING AND EVAPORATION OF THE SOLUTION, SAID REFRACTORY SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN AND MOLYBDENUM; AND THE STEP OF COREDUCTION TO THE ALLOY METAL POWDER BY USE OF HYDROGEN OR CARBON.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US417800A US3418103A (en) | 1964-12-11 | 1964-12-11 | Process for making tungsten and molybdenum alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US417800A US3418103A (en) | 1964-12-11 | 1964-12-11 | Process for making tungsten and molybdenum alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3418103A true US3418103A (en) | 1968-12-24 |
Family
ID=23655448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US417800A Expired - Lifetime US3418103A (en) | 1964-12-11 | 1964-12-11 | Process for making tungsten and molybdenum alloys |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3418103A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770392A (en) * | 1971-05-10 | 1973-11-06 | Gen Electric | Molybdenum-base alloys |
| US4216009A (en) * | 1977-07-27 | 1980-08-05 | Sumitomo Electric Industries, Ltd. | Method of making alloy and carbide powders of molybdenum and tungsten |
| US4384884A (en) * | 1981-01-05 | 1983-05-24 | Sumitomo Electric Industries, Ltd. | Process for the production of a hard solid solution containing molybdenum |
| EP0324507A1 (en) * | 1988-01-14 | 1989-07-19 | GTE Products Corporation | Process for producing tungsten heavy alloy sheet by a loose fill hydrometallurgical process |
| EP0325179A1 (en) * | 1988-01-14 | 1989-07-26 | GTE Products Corporation | Process for producing tungsten heavy alloy sheet |
| EP0326861A1 (en) * | 1988-01-30 | 1989-08-09 | H.C. Starck GmbH & Co. KG | Composite agglomerated metal powder, process for manufacturing it an its use |
| US5118317A (en) * | 1987-04-21 | 1992-06-02 | U.S. Philips Corporation | Impregnated cathodes with a controlled porosity |
| US5897962A (en) * | 1993-07-16 | 1999-04-27 | Osram Sylvania Inc. | Method of making flowable tungsten/copper composite powder |
| US5956560A (en) * | 1994-12-22 | 1999-09-21 | Osram Sylvania Inc. | Tungsten-copper composite powder |
| US6174494B1 (en) * | 1993-07-06 | 2001-01-16 | Lockheed Martin Energy Systems, Inc. | Non-lead, environmentally safe projectiles and explosives containers |
| US6375708B1 (en) | 1994-12-22 | 2002-04-23 | Osram Sylvania Inc. | Alloy for electrical contacts and electrodes and method of making |
| US20030075018A1 (en) * | 2000-08-23 | 2003-04-24 | Helmut Meinhardt | Process for the production of composite components by powder injection molding, and composite powders suitable for this purpose |
| US6576037B1 (en) * | 1998-10-16 | 2003-06-10 | Eurotungstene Poudres | Metal micropowders based on tungsten and/or molybdenum and 3D transition metals |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1829635A (en) * | 1929-05-28 | 1931-10-27 | Gen Electric | Method of making alloys |
| US2410717A (en) * | 1942-10-10 | 1946-11-05 | Cutler Hammer Inc | Metallic compounds adapted to form an electrical contact |
-
1964
- 1964-12-11 US US417800A patent/US3418103A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1829635A (en) * | 1929-05-28 | 1931-10-27 | Gen Electric | Method of making alloys |
| US2410717A (en) * | 1942-10-10 | 1946-11-05 | Cutler Hammer Inc | Metallic compounds adapted to form an electrical contact |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770392A (en) * | 1971-05-10 | 1973-11-06 | Gen Electric | Molybdenum-base alloys |
| US4216009A (en) * | 1977-07-27 | 1980-08-05 | Sumitomo Electric Industries, Ltd. | Method of making alloy and carbide powders of molybdenum and tungsten |
| US4384884A (en) * | 1981-01-05 | 1983-05-24 | Sumitomo Electric Industries, Ltd. | Process for the production of a hard solid solution containing molybdenum |
| US5118317A (en) * | 1987-04-21 | 1992-06-02 | U.S. Philips Corporation | Impregnated cathodes with a controlled porosity |
| EP0324507A1 (en) * | 1988-01-14 | 1989-07-19 | GTE Products Corporation | Process for producing tungsten heavy alloy sheet by a loose fill hydrometallurgical process |
| EP0325179A1 (en) * | 1988-01-14 | 1989-07-26 | GTE Products Corporation | Process for producing tungsten heavy alloy sheet |
| EP0326861A1 (en) * | 1988-01-30 | 1989-08-09 | H.C. Starck GmbH & Co. KG | Composite agglomerated metal powder, process for manufacturing it an its use |
| US4915733A (en) * | 1988-01-30 | 1990-04-10 | Hermann C. Starck Berlin Gmbh & Co. Kg | Agglomerated metal composite powders |
| US6174494B1 (en) * | 1993-07-06 | 2001-01-16 | Lockheed Martin Energy Systems, Inc. | Non-lead, environmentally safe projectiles and explosives containers |
| US5897962A (en) * | 1993-07-16 | 1999-04-27 | Osram Sylvania Inc. | Method of making flowable tungsten/copper composite powder |
| US6103392A (en) * | 1994-12-22 | 2000-08-15 | Osram Sylvania Inc. | Tungsten-copper composite powder |
| US5956560A (en) * | 1994-12-22 | 1999-09-21 | Osram Sylvania Inc. | Tungsten-copper composite powder |
| US6375708B1 (en) | 1994-12-22 | 2002-04-23 | Osram Sylvania Inc. | Alloy for electrical contacts and electrodes and method of making |
| US6576037B1 (en) * | 1998-10-16 | 2003-06-10 | Eurotungstene Poudres | Metal micropowders based on tungsten and/or molybdenum and 3D transition metals |
| US20030075018A1 (en) * | 2000-08-23 | 2003-04-24 | Helmut Meinhardt | Process for the production of composite components by powder injection molding, and composite powders suitable for this purpose |
| US6858060B2 (en) * | 2000-08-23 | 2005-02-22 | H. C. Starck Gmbh & Co. Kg | Process for the production of composite components by powder injection molding, and composite powders suitable for this purpose |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3418103A (en) | Process for making tungsten and molybdenum alloys | |
| US2406172A (en) | Platinum or allied metals, or their alloys, and articles made therefrom | |
| EP0022980B1 (en) | Process for manufacturing silver powder | |
| US4808223A (en) | Silver/metal oxide material for electrical contacts and method of producing the same | |
| DE2833015A1 (en) | ALLOY CONTAINING MOLYBDA AND TUNGSTEN IN POWDER FORM AND USE OF THIS ALLOY | |
| US3468658A (en) | Method of producing dispersion strengthened metals | |
| Smith | Diffusion Mechanism for the Nickel‐Activated Sintering of Molybdenum | |
| DE3886921T2 (en) | METHOD FOR PRODUCING CHEVREL CONNECTIONS. | |
| EP0232772B1 (en) | Process for preparing a pulverulent amorphous material by way of a milling process | |
| US2866741A (en) | Control rod for a nuclear reactor and method of preparation | |
| US3375109A (en) | Process for preparing rheniumrefractory alloys | |
| US1878589A (en) | Manufacture of nickel iron alloys | |
| GB1102339A (en) | Dispersion-modified metals | |
| US3505065A (en) | Method of making sintered and infiltrated refractory metal electrical contacts | |
| US2119488A (en) | Alloys and process of making same | |
| DE2853931A1 (en) | METHOD FOR PRODUCING METALLIC POWDER | |
| Masumoto et al. | On a New C1b-Type Compound AuMnSb and Its Magnetic Properties | |
| DE2033100A1 (en) | Dispersions of nitrides in a metal or an alloy and process for their preparation | |
| Thomson | The crystal structure of Th3Pd5 and Th3Pt5 | |
| US3503720A (en) | Rhenium-refractory metal alloys | |
| US3737301A (en) | Process for producing iron-molybdenum alloy powder metal | |
| US2410717A (en) | Metallic compounds adapted to form an electrical contact | |
| US3753703A (en) | Sintered molybdenum boron alloy | |
| DE1483292B2 (en) | Process for the extensive prevention of hydrogen embrittlement of oxygen-containing, in particular tough-polar or dispersion-hardened copper or such a copper alloy | |
| US2476222A (en) | Production of powdered metal mixtures for sintering |