US2362147A - Removal of silicon from aluminum and aluminum alloys - Google Patents
Removal of silicon from aluminum and aluminum alloys Download PDFInfo
- Publication number
- US2362147A US2362147A US521682A US52168244A US2362147A US 2362147 A US2362147 A US 2362147A US 521682 A US521682 A US 521682A US 52168244 A US52168244 A US 52168244A US 2362147 A US2362147 A US 2362147A
- Authority
- US
- United States
- Prior art keywords
- aluminum
- magnesium
- silicon
- alloy
- alloys
- 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
- 229910052710 silicon Inorganic materials 0.000 title description 56
- 239000010703 silicon Substances 0.000 title description 56
- 229910000838 Al alloy Inorganic materials 0.000 title description 38
- 229910052782 aluminium Inorganic materials 0.000 title description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 56
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 47
- 229910052749 magnesium Inorganic materials 0.000 description 47
- 239000011777 magnesium Substances 0.000 description 47
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 28
- 229910000861 Mg alloy Inorganic materials 0.000 description 22
- 239000007787 solid Substances 0.000 description 16
- 229910045601 alloy Inorganic materials 0.000 description 15
- 239000000956 alloy Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 14
- YTHCQFKNFVSQBC-UHFFFAOYSA-N magnesium silicide Chemical compound [Mg]=[Si]=[Mg] YTHCQFKNFVSQBC-UHFFFAOYSA-N 0.000 description 13
- 229910021338 magnesium silicide Inorganic materials 0.000 description 13
- 239000000155 melt Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 229910021332 silicide Inorganic materials 0.000 description 7
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 2
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241001424413 Lucia Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Definitions
- My invention relates to the separation of excessive amounts of silicon from aluminum or aluminum alloys containing the same.
- silicon is very effectively removed from aluminum or aluminum alloys by providing "a melt comprising said silicon-containing aluminum or aluminum alloy and not less than a certain minimum amount of magnesium, hereinafter set forth, allowing the melt to stand in a substantially quiescent state, at a temperature at which the aluminum-magnesium alloy which is formed remains fluid, until the silicon settles out in the form of solid magnesium silicide (MgzSi), and thereafter separating the fluid aluminum-magnesium alloy from the solid silicon compound.
- This latter separation may be effected in any suitable manner as, for example, by decantation or the like.
- the amount of magnesium required may be determined by calculation or simple experiment.
- the amount of magnesium employed is determined by using approximately 1.73 times the amount of silicon contained in the aluminum alloy to be treated plus the amount of magnesium required to be combined with that amount of aluminum contained in the aluminum alloy to be treated so as to obtain an aluminum-magnesium alloy containing in excess of 60% magnesium.
- the amount of magnesium required to be added to accomplish my results is important, as I have indicated hereinabove.
- additions of magnesium in such proportions are ineffective about to about by weight, of mag- I to precipitate any appreciable amounts of silicon in a form where the same settle; out on standing.
- Example I To a molten aluminum alloy containing a high content of silicon, an amount of magnesium was Per cent Aluminum 28.62 Silicon 0.09 Iron 0.02 Magnesium 71.27
- the melt comprising the silicon-containing aluminum or aluminum alloy and magnesium is maintained in a substantially quiescent state until the magnesium silicide has settled to the bottom in solid form.
- the temperature at which the melt is held in such quiescent state should not be substantially less than 450 degrees C. I prefer, however, that the temperature be maintained at approximately 475 degrees C. to 575 degrees C.
- the temperature should be high enough so that the molten aluminum-magnesium alloy which is formed is suillciently fluid to enable it to be separated emcaciously from the solids which settle to the bottom of the crucible or other vessel in which the melt is contained, and, of course, the temperature must be such that the magnesium silicide is in a solid condition. It is, of course, possible to allow the settling of the magnesium silicide to occur at temperatures slightly below 450 degrees 0., after which the melt may be heated up to a temperature suflicient to allow the aluminum-magnesium alloy to be poured oil.
- a highpurity aluminum may be recovered. for example, by distilling oil. the magnesium. The latter may. then, be reused in the process for the removal of silicon from additional quantities of silicon-containing aluminum or aluminum alloys.
- the aluminummagnesium alloys which are obtained contain not substantially more than 0.1% of silicon and preierably substantially less.
- a. method of removing excessive amounts of silicon from aluminum alloys containing the same and simultaneously forming an aluminummagnesium alloy containing in excess of 60% magnesium the steps which include providing a melt containing said silicon-containing aluminum alloy and added magnesium, allowing the mass to stand in a substantially quiescent state under temperature conditions such that the resulting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of solid magnesium silicide, and separating the fluid aluminum-magnesium alloy from the solid silicide, the amount of magnesium added to the silicon-containing aluminum alloy being such that the aluminum-magnesium alloy contains in excess of 60%, by weight, of magnesium.
- a method of removing excessive amounts of silicon from aluminum alloys containing the same and simultaneously forming an aluminummagnesium alloy containing from about 70% to about 75% magnesium the steps which include melting said silicon-containing aluminum alloy, admixing magnesium therewith, allowing the mass to stand in a substantially quiescent state under temperature conditions such that the resuiting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of magnesium silicide, and separating the fluid aluminum-magnesium alloy from the solid silicide, the amount of magnesium added to the siliconcontaining aluminum alloy being such that the aluminum-magnesium alloy contains from about 70% to about 75%, by weight, of magnesium.
- steps which include providing a melt containing said silicon-containing aluminum alloy and added magnesium, allowing the mass to stand in a substantially quiescent state under temperature conditions such that the resulting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of solid magnesium silicide, and separating the fluid aluminum-magnesium alloy from the solid silicide while maintaining the mass at a temperature not substantially below 450 degrees C., the amount of magnesium added to the silicon-containing aluminum alloy being such that the aluminum-magnesium alloy contains from about to about by weight, of magnesium.
- steps which include forming a melt containing said silicon-containing aluminum alloy and added magnesium, allowing the melt to stand in a substantially quiescent state under temperature conditions such that the resulting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of solid magnesium silicide, and thereafter separating the fluid aluminum-magnesium alloy from the solid silicide, the amount of magnesium added to the silicon-containing aluminum alloy being such that the aluminum-magnesium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Silicon Compounds (AREA)
Description
\ Patented Nov 7 1944 REMOVAL OF SILICON FROM ALUMINUM AND ALUMINUM ALLOYS Lucia 1''. Mondolfo, Chicago, Ill.
No Drawing. Application February 9, 1944. Serial No. 521,882
5 Claims.
My invention relates to the separation of excessive amounts of silicon from aluminum or aluminum alloys containing the same.
Numerous eiforts have heretofore been made to remove silicon from aluminum or aluminum alloys containing the same but, to my knowledge, none of these efforts has proven to be fully satisfactory. Thus, for example, it has been proposed to treat the molten silicon-containing aluminum or aluminum alloy with zinc to form a zinc-aluminum alloy, the silicon freezing out as metallic silicon together with other impurities and the zinc-aluminum alloy being separated by nitration or the like. In place of zinc, the use of tin and mercury and alloys thereof has been suggested. In all cases, the zinc, tin or mercury, whichever is used, is eliminated from the alloy formed with the aluminum by distillation, electrolysis or extraction in accordance with known practices. While such procedures are somewhat effective in bringing about removal of silicon, they have certain marked disadvantages among which may be mentioned the necessity for using large amounts of zinc, tin or mercury in relation to the amount of the pure aluminum recovered.
In accordance with my invention silicon is very effectively removed from aluminum or aluminum alloys by providing "a melt comprising said silicon-containing aluminum or aluminum alloy and not less than a certain minimum amount of magnesium, hereinafter set forth, allowing the melt to stand in a substantially quiescent state, at a temperature at which the aluminum-magnesium alloy which is formed remains fluid, until the silicon settles out in the form of solid magnesium silicide (MgzSi), and thereafter separating the fluid aluminum-magnesium alloy from the solid silicon compound. This latter separation may be effected in any suitable manner as, for example, by decantation or the like.
As I have stated. a certain minimum amount of magnesium must be added to the silicon-"containing aluminum or aluminum alloy if the advantages obtainable by the practice of the invention are fully realized. I have found this minimum amount of magnesium to be such that the aluminum-magnesium alloy which is formed and separated in the fluid state from the solid silicide contains in excess of 60%, by
weight, of magnesium. Especially satsfactorynesium; This requires the employment of materially greater amounts of magnesium that would, in theory, be needed to produce an aluminum-magnesium alloy containing the stated amounts of magnesium because of some losses due to oxidation and to the fact that the magnesium combines with the silicon-to form a silicide. The amount of magnesium required may be determined by calculation or simple experiment. By way of calculation, the amount of magnesium employed is determined by using approximately 1.73 times the amount of silicon contained in the aluminum alloy to be treated plus the amount of magnesium required to be combined with that amount of aluminum contained in the aluminum alloy to be treated so as to obtain an aluminum-magnesium alloy containing in excess of 60% magnesium. It will, of course, as indicated, vary, depending upon the particular content of silicon in and the particular composition of the aluminum alloy to be treated. While the primary object of the invention is to effect the separation of silicon, other elements, depending on their nature, such as tungsten, vanadium, chromium and manganese, present in the silicon-containing aluminum or aluminum alloys may also settle out together or'along with the magnesium silicide. Such, however, is incidental to the practice of my invention which, as stated, is concerned with the separation or removal of silicon.
The amount of magnesium required to be added to accomplish my results is important, as I have indicated hereinabove. Thus, for example, whereas it has been proposed to remove iron from aluminum or aluminum alloys by means of the addition to a molten mass thereof of from 5% to 60% magnesium, additions of magnesium in such proportions are ineffective about to about by weight, of mag- I to precipitate any appreciable amounts of silicon in a form where the same settle; out on standing.
In order that those skilled in the artmay more fully understand the nature and scope of my invention, the following examples of the practice of my invention are given. It will be understood that they are simply illustrative and are not limitative of the full scope of my invention which is set out in the claims. Thus, for example, different silicon-containing aluminum alloy may be treated, having varying proportions of silicon, the temperatures may be varied within limits, fluxes or protective atmospheres may be employed, the melt may be subjected to slight vibratory action to enhance settling out of the magnesium silicide, and other changes ciples which are disclosed herein.
- Example I To a molten aluminum alloy containing a high content of silicon, an amount of magnesium was added so that the melt analyzed, by weight, 20%
aluminum, 70% magnesium, 9% silicon, and 1% iron. The resulting allby was heated to 900 degrees C.', cooled, and held for approximately one hour at a temperature between 550 and 600 degrees C. The top layer was poured out and the resulting alloy showed, on analysis, the following proportions by weight:
. Per cent Aluminum 30.98 Silicon 0.08 Iron .0.02 Magnesium 68.92
Example I] To a molten aluminum alloy containing a high content of silicon, an amount of magnesium was Per cent Aluminum 28.62 Silicon 0.09 Iron 0.02 Magnesium 71.27
As I have pointed out hereinabove, the melt comprising the silicon-containing aluminum or aluminum alloy and magnesium is maintained in a substantially quiescent state until the magnesium silicide has settled to the bottom in solid form. In general, the temperature at which the melt is held in such quiescent state should not be substantially less than 450 degrees C. I prefer, however, that the temperature be maintained at approximately 475 degrees C. to 575 degrees C. The temperature should be high enough so that the molten aluminum-magnesium alloy which is formed is suillciently fluid to enable it to be separated emcaciously from the solids which settle to the bottom of the crucible or other vessel in which the melt is contained, and, of course, the temperature must be such that the magnesium silicide is in a solid condition. It is, of course, possible to allow the settling of the magnesium silicide to occur at temperatures slightly below 450 degrees 0., after which the melt may be heated up to a temperature suflicient to allow the aluminum-magnesium alloy to be poured oil.
It will be appreciated that the length of time that the melt is allowed to sand in a quiescent state before settling out of the magnesium silicide and such as other impurities may be present and settle out along with the magnesium silicide, is
variable. In some cases only a few minutes standor modifications may'be made within the spirit 0! the invention in the light of the guiding prinalso within the scope oi my invention to melt the silicon-containing aluminum or aluminum alloy together with the magnesium or, alternatively, the magnesium may be initially melted and the silicon-containing aluminum or aluminum alloy may be added thereto. In general, it is within the scope of my invention to add the magnesium in solid or liquid form or even in the vapor state t6 the silicon-containing aluminum alloy.
From the aluminum-magnesium alloys which result from the practice of my invention, a highpurity aluminum may be recovered. for example, by distilling oil. the magnesium. The latter may. then, be reused in the process for the removal of silicon from additional quantities of silicon-containing aluminum or aluminum alloys.
While my invention is applicable to the treatment of aluminum or aluminum alloys containing various percentages of silicon which are deemed excessive, it has particular utility for the treatment of such alloys which contain upwards of 60% of aluminum, by weight, together with up wards of 2% of silicon, by weight. In the preferred practice of my invention, the aluminummagnesium alloys which are obtained contain not substantially more than 0.1% of silicon and preierably substantially less.
In order to simplify the word definition of the invention, it will be understood that, wherever reference is made in the claims to the removal of silicon from aluminum alloys containing the same, such alloys may contain, in addition to the silicon and aluminum, other elements as well.
While I prefer to use commercially pure magnesium in the practice of my invention, I find that impure magnesium-or magneshun-base alloys may be used efiectively. Wherever magnesium is referred to in the claims in relation to its addition to the silicon-containing aluminum alloy, it will be understood that the term magnesium is intended to include impure magnesium and magnesium-base alloys.
Although my invention has been described in detail, it will be understood that it is not to be limited except as defined in the claims.
What I claim as new and desire to protect by Letters Patent of the United States is:
1. In a. method of removing excessive amounts of silicon from aluminum alloys containing the same and simultaneously forming an aluminummagnesium alloy containing in excess of 60% magnesium, the steps which include providing a melt containing said silicon-containing aluminum alloy and added magnesium, allowing the mass to stand in a substantially quiescent state under temperature conditions such that the resulting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of solid magnesium silicide, and separating the fluid aluminum-magnesium alloy from the solid silicide, the amount of magnesium added to the silicon-containing aluminum alloy being such that the aluminum-magnesium alloy contains in excess of 60%, by weight, of magnesium.
2. In a method of removing excessive amounts of silicon from aluminum alloys containing the same and simultaneously forming an aluminummagnesium alloy containing from about 70% to about 75% magnesium, the steps which include melting said silicon-containing aluminum alloy, admixing magnesium therewith, allowing the mass to stand in a substantially quiescent state under temperature conditions such that the resuiting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of magnesium silicide, and separating the fluid aluminum-magnesium alloy from the solid silicide, the amount of magnesium added to the siliconcontaining aluminum alloy being such that the aluminum-magnesium alloy contains from about 70% to about 75%, by weight, of magnesium.
3. In a method of removing excessive amounts of silicon from aluminum alloys containing the same and simultaneously forming an aluminummagnesium alloy containing in excess of 60% magnesium, the steps which include melting said silicon-containing aluminum alloy, admixing magnesium therewith, allowing the mass to stand in a substantially quiescent state under temperature conditions such that the resulting aluminum-magnesium alloy remains fluid and the silicon settles out. in the form of solid magnesium silicide, and separating the fluid aluminum-magnesium alloy from the solid silicide, the amount of magnesium added to the silicon-containing aluminum alloybeing such that the aluminummagnesium alloy contains in excess of 60%, by weight, of magnesium.
4. In a method of removing excessive amounts of silicon from aluminum alloys containing the same and simultaneously forming an aluminummagnesium alloy containing from about 70% to about 75% magnesium, the steps which include providing a melt containing said silicon-containing aluminum alloy and added magnesium, allowing the mass to stand in a substantially quiescent state under temperature conditions such that the resulting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of solid magnesium silicide, and separating the fluid aluminum-magnesium alloy from the solid silicide while maintaining the mass at a temperature not substantially below 450 degrees C., the amount of magnesium added to the silicon-containing aluminum alloy being such that the aluminum-magnesium alloy contains from about to about by weight, of magnesium.
5. In a method of removing excessive amounts of silicon from aluminum alloys containing upwards of 60% aluminum and upwards of 2% silicon and simultaneously forming an alumi hum-magnesium alloy containing in excess of 60% magnesium, the steps which include forming a melt containing said silicon-containing aluminum alloy and added magnesium, allowing the melt to stand in a substantially quiescent state under temperature conditions such that the resulting aluminum-magnesium alloy remains fluid and the silicon settles out in the form of solid magnesium silicide, and thereafter separating the fluid aluminum-magnesium alloy from the solid silicide, the amount of magnesium added to the silicon-containing aluminum alloy being such that the aluminum-magnesium
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US521682A US2362147A (en) | 1944-02-09 | 1944-02-09 | Removal of silicon from aluminum and aluminum alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US521682A US2362147A (en) | 1944-02-09 | 1944-02-09 | Removal of silicon from aluminum and aluminum alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2362147A true US2362147A (en) | 1944-11-07 |
Family
ID=24077692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US521682A Expired - Lifetime US2362147A (en) | 1944-02-09 | 1944-02-09 | Removal of silicon from aluminum and aluminum alloys |
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| Country | Link |
|---|---|
| US (1) | US2362147A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2665223A (en) * | 1949-12-31 | 1954-01-05 | Nat Res Corp | Process for depositing an aluminum film on a substrate by thermal vaporization |
| US2867527A (en) * | 1955-10-05 | 1959-01-06 | Andrieux Jean Lucien | Process of simultaneously producing calcium metal and a silicon-aluminum alloy |
| FR2393074A1 (en) * | 1977-06-03 | 1978-12-29 | Nl Industries Inc | PROCESS FOR SEPARATING MAGNESIUM FROM AN ALUMINUM ALLOY |
| EP0289294A1 (en) * | 1987-04-29 | 1988-11-02 | Alcan International Limited | Aluminium alloy treatment |
| US5676774A (en) * | 1995-02-10 | 1997-10-14 | Kb Alloys, Inc. | Magnesium alloy as an aluminum hardener |
| US20080116148A1 (en) * | 2004-02-17 | 2008-05-22 | John Henry Courtenay | Treatment of Metal Melts |
-
1944
- 1944-02-09 US US521682A patent/US2362147A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2665223A (en) * | 1949-12-31 | 1954-01-05 | Nat Res Corp | Process for depositing an aluminum film on a substrate by thermal vaporization |
| US2867527A (en) * | 1955-10-05 | 1959-01-06 | Andrieux Jean Lucien | Process of simultaneously producing calcium metal and a silicon-aluminum alloy |
| FR2393074A1 (en) * | 1977-06-03 | 1978-12-29 | Nl Industries Inc | PROCESS FOR SEPARATING MAGNESIUM FROM AN ALUMINUM ALLOY |
| EP0289294A1 (en) * | 1987-04-29 | 1988-11-02 | Alcan International Limited | Aluminium alloy treatment |
| US4917728A (en) * | 1987-04-29 | 1990-04-17 | Alcan International Limited | Aluminium alloy treatment |
| US5676774A (en) * | 1995-02-10 | 1997-10-14 | Kb Alloys, Inc. | Magnesium alloy as an aluminum hardener |
| US20080116148A1 (en) * | 2004-02-17 | 2008-05-22 | John Henry Courtenay | Treatment of Metal Melts |
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