EP0709478A1 - Alloy based or silicides and further containing chromium and molybdenum - Google Patents
Alloy based or silicides and further containing chromium and molybdenum Download PDFInfo
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- EP0709478A1 EP0709478A1 EP94116323A EP94116323A EP0709478A1 EP 0709478 A1 EP0709478 A1 EP 0709478A1 EP 94116323 A EP94116323 A EP 94116323A EP 94116323 A EP94116323 A EP 94116323A EP 0709478 A1 EP0709478 A1 EP 0709478A1
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- EP
- European Patent Office
- Prior art keywords
- alloy
- molybdenum
- atomic percent
- chromium
- silicides
- Prior art date
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 43
- 239000000956 alloy Substances 0.000 title claims abstract description 43
- 229910052750 molybdenum Inorganic materials 0.000 title claims abstract description 15
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 12
- 229910021332 silicide Inorganic materials 0.000 title claims abstract description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims description 15
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title claims description 14
- 239000011733 molybdenum Substances 0.000 title claims description 14
- 239000011651 chromium Substances 0.000 title claims description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 9
- 239000010937 tungsten Substances 0.000 claims description 9
- 229910052727 yttrium Inorganic materials 0.000 claims description 9
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 8
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910000676 Si alloy Inorganic materials 0.000 claims 1
- 230000003647 oxidation Effects 0.000 description 14
- 238000007254 oxidation reaction Methods 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910021357 chromium silicide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 or under vacuum Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
-
- 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
- C22C27/06—Alloys based on chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/18—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on silicides
Definitions
- Alloys based on a silicide containing at least chromium and molybdenum are characterized by high oxidation and corrosion resistance at high temperatures and can be used in parts of thermal machines that are exposed to high thermal loads, oxidizing and / or corrosive effects. It is an additional advantage for the use of these alloys as a construction material that they have a lower density than the commonly used nickel-based superalloys.
- an oxidation and corrosion-resistant alloy based on a silicide containing at least chromium and molybdenum is described in EP 0 425 972 B1.
- this alloy has a chromium content of 60 and more atom percent and is then characterized by good mechanical resistance at temperatures up to 1000 ° C., with good resistance to oxidation and corrosion.
- the oxidation resistance of this alloy is not sufficient for certain practical applications.
- the invention is based on the object of developing an alloy based on a silicide containing at least chromium and molybdenum, which has excellent oxidation resistance and good mechanical properties at temperatures of more than 1000 ° C.
- the alloy according to the invention is distinguished in that it has a considerably improved oxidation resistance at temperatures around 1250 ° C. compared to comparable known alloys based on a silicide containing at least chromium and molybdenum.
- their ductility and mechanical strength at high temperatures are sufficient to particularly favor their suitability as a construction material in components which are exposed to temperatures of 1000 to 1400 ° C. in an oxidizing and / or corrosive atmosphere.
- the alloy according to the invention can also be produced inexpensively by melting and casting.
- alloys with the composition given in the table below were atomized in percent by atom from the elements present in predetermined stoichiometric ratios.
- D E F G chrome 60 60 51 50 50 40 53 molybdenum 15 15 14 15 15 30th 13 Silicon 25th 25th 35 30th 30th 30th 34 tungsten - - - 5 5 - - yttrium - 0.05 - - 0.02 0.02 -
- the melts were poured into castings with a diameter of approx. 40 mm and a height of approx. 50 mm. From this, platelets with a surface area of approx. 1 cm2 and a thickness of approx. and creep tests.
- Alloys A - F made from the castings were heated to 1250 ° C. in air.
- the mass loss or mass increase caused by oxidation and / or corrosion of each of the platelets was determined thermogravimetrically after 12 hours 40 minutes and sometimes also after 100 hours.
- the loss of mass or the increase in mass ⁇ W [mg] based on the size of the surface A0 [cm2] of each of the platelets, is then a measure of the oxidation and corrosion resistance of the alloys A - F and is summarized in the table below.
- alloy A which served as a comparison alloy, and alloy B with a relatively large addition of yttrium, have a substantially reduced resistance to oxidation and corrosion compared to alloys C - F according to the invention.
- Alloy C has a particularly favorable resistance to oxidation, the mass loss or mass increase of which changes only slightly between 12h 40min and 100h.
- alloys D and E By alloying tungsten and / or yttrium to the slightly modified alloy C (alloys D and E), the oxidation resistance compared to alloy C was somewhat reduced, but the oxidation resistance of alloys according to the prior art was considerably exceeded and at the same time a particularly good mechanical strength reached.
- test specimens for the creep rupture tests were heated to 1300 ° C. and the true creep rate as a function of the true voltage was determined at this temperature. It was found that alloying tungsten and / or yttrium doubled or even tripled the creep resistance.
- the ductility of the alloy according to the invention was determined indirectly on the basis of compression tests.
- the test specimens intended for compression tests were compressed at temperatures of 1100, 1200, 1300 and 1400 ° C and at every temperature the compression pressure is determined at the 0.2% proof stress. This resulted in the compression pressure values summarized in the following table: Temperature [° C] Pressure at the 0.2% proof stress [MPa] alloy C.
- D E G 1100 795 - - - 1200 507 - - 625 1300 351 374 601 396 1400 204 199 348 214
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Powder Metallurgy (AREA)
- Supercharger (AREA)
Abstract
Description
Legierungen auf der Basis eines zumindest Chrom und Molybdän enthaltenden Silicids zeichnen sich bei hohen Temperaturen durch hohe Oxidations- und Korrosionsbeständigkeit aus und können in thermisch hoch belasteten, oxidierenden und/oder korrodierenden Wirkungen ausgesetzten Teilen thermischer Maschinen eingesetzt werden. Hierbei ist es für die Verwendung dieser Legierungen als Konstruktionswerkstoff von zusätzlichem Vorteil, dass sie gegenüber den üblicherweise verwendeten Nickelbasis-Superlegierungen eine geringere Dichte aufweisen.Alloys based on a silicide containing at least chromium and molybdenum are characterized by high oxidation and corrosion resistance at high temperatures and can be used in parts of thermal machines that are exposed to high thermal loads, oxidizing and / or corrosive effects. It is an additional advantage for the use of these alloys as a construction material that they have a lower density than the commonly used nickel-based superalloys.
Eine oxidations- und korrosionsbeständige Legierung auf der Basis eines zumindest Chrom und Molybdän enthaltenden Silicids ist in EP 0 425 972 B1 beschrieben. Diese Legierung weist in bevorzugten Ausführungsformen einen Chromgehalt von 60 und mehr Atomprozent auf und zeichnet sich dann bei guter Oxidations- und Korrosionsbeständigkeit durch eine hohe mechanische Festigkeit bei Temperaturen bis zu 1000°C aus. Für bestimmte praktische Anwendungen reicht die Oxidationsbeständigkeit dieser Legierung jedoch noch nicht aus.An oxidation and corrosion-resistant alloy based on a silicide containing at least chromium and molybdenum is described in EP 0 425 972 B1. In preferred embodiments, this alloy has a chromium content of 60 and more atom percent and is then characterized by good mechanical resistance at temperatures up to 1000 ° C., with good resistance to oxidation and corrosion. However, the oxidation resistance of this alloy is not sufficient for certain practical applications.
Eine weitere Legierung auf der Basis eines zumindest Chrom und Molybdän enthaltenden Silicids ist aus dem von S.V.Raj, NASA Lewis Research Center, Cleveland/OH, erstellten Bericht "A Preliminary Assessment of the Properties of a Chromium Silicide Alloy for Aerospace Applications", (submitted to Mater. Sci. Eng. and Proc. 3rd. International Conf. on High-Temperature Intermetallics, May 9, 1994) bekannt. Bei der in diesem Bericht beschriebene Legierung Cr₄₀Mo₃₀Si₃₀ wurde gegenüber anderen Siliciden eine besonders gute Oxidationsbeständigkeit festgestellt. Es wird aber darauf hingewiesen, dass aufgrund einer äusserst geringen Duktilität an einen praktischen Einsatz dieser Legierung nicht zu denken sei.Another alloy based on a silicide containing at least chromium and molybdenum is from the report "A Preliminary Assessment of the Properties of a Chromium Silicide prepared by SVRaj, NASA Lewis Research Center, Cleveland / OH Alloy for Aerospace Applications ", (submitted to Mater. Sci. Eng. And Proc. 3rd. International Conf. On High-Temperature Intermetallics, May 9, 1994). In the alloy Cr₄₀Mo₃₀Si₃₀ described in this report was a special compared to other silicides good resistance to oxidation was found, but it should be noted that due to its extremely low ductility, this alloy cannot be used in practice.
Der Erfindung, wie sie in Patentanspruch 1 angegeben ist, liegt die Aufgabe zugrunde, eine Legierung auf der Basis eines zumindest Chrom und Molybdän enthaltenden Silicids zu entwickeln, welche bei Temperaturen von mehr als 1000°C eine hervorragende Oxidationsbeständigkeit und gute mechanische Eigenschaften aufweist.The invention, as specified in claim 1, is based on the object of developing an alloy based on a silicide containing at least chromium and molybdenum, which has excellent oxidation resistance and good mechanical properties at temperatures of more than 1000 ° C.
Die erfindungsgemässe Legierung zeichnet sich dadurch aus, dass sie gegenüber vergleichbaren bekannten Legierungen auf der Basis eines zumindest Chrom und Molybdän enthaltenden Silicids bei Temperaturen um 1250°C eine erheblich verbesserte Oxidationsbeständigkeit aufweist. Zudem reichen ihre Duktilität und mechanische Festigkeit bei hohen Temperaturen aus, um deren Eignung als Konstruktionswerkstoff in Bauteilen, die in oxidierender und/oder korrodierender Atmosphäre Temperaturen von 1000 bis 1400°C ausgesetzt sind, besonders zu begünstigen. Die erfindungsgemässe Legierung kann darüber hinaus kostengünstig durch Schmelzen und Giessen hergestellt werden.The alloy according to the invention is distinguished in that it has a considerably improved oxidation resistance at temperatures around 1250 ° C. compared to comparable known alloys based on a silicide containing at least chromium and molybdenum. In addition, their ductility and mechanical strength at high temperatures are sufficient to particularly favor their suitability as a construction material in components which are exposed to temperatures of 1000 to 1400 ° C. in an oxidizing and / or corrosive atmosphere. The alloy according to the invention can also be produced inexpensively by melting and casting.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen näher beschrieben.The invention is described in more detail below on the basis of exemplary embodiments.
In einem Induktionsofen wurden unter Schutzgas, wie insbesondere unter Argon, oder unter Vakuum aus den in vorgegebenen stöchiometrischen Verhältnissen vorliegenden Elementen Legierungen der in der nachfolgenden Tabelle angegebenen Zusammensetzung in Atomprozent erschmolzen.
Die Schmelzen wurden zu Gusskörpern von ca. 40 mm Durchmesser und ca. 50 mm Höhe abgegossen.Hieraus wurden Plättchen mit einer Oberfläche von ca. 1 cm² und einer Dicke von ca. 1-2 mm für die Bestimmung der Oxidationsbeständigkeit und Probekörper für Stauch- und Zeitstandversuche hergestellt.The melts were poured into castings with a diameter of approx. 40 mm and a height of approx. 50 mm. From this, platelets with a surface area of approx. 1 cm² and a thickness of approx. and creep tests.
Aus den Gusskörpern hergestellte Plättchen der Legierungen A - F wurden unter Luft auf 1250°C aufgeheizt. Der hierbei durch Oxidation und/oder Korrosion hervorgerufene Massenverlust oder Massenzuwachs jedes der Plättchen wurde nach 12h 40min und teilweise zusätzlich auch nach 100h thermogravimetrisch ermittelt. Der Massenverlust bzw. der Massenzuwachs δW [mg], bezogen auf die Grösse der Oberfläche A₀ [cm²] jedes der Plättchen, ist dann ein Mass für die Oxidations- und Korrosionsbeständigkeit der Legierungen A - F und ist in der nachfolgenden Tabelle zusammengestellt.
Hieraus ist zu ersehen, dass die Legierung A, welche als Vergleichslegierung diente, und die Legierung B mit einem relativ grossen Yttriumzusatz, gegenüber den erfindungsgemässen Legierungen C - F eine wesentlich herabgesetzte Oxidations- und Korrosionsbeständigkeit aufweisen. Eine besonders günstige Oxidationsbeständigkeit weist die Legierung C auf, deren Massenverlust bzw. Massenzuwachs zwischen 12h 40min und 100h sich nur geringfügig ändert.It can be seen from this that alloy A, which served as a comparison alloy, and alloy B with a relatively large addition of yttrium, have a substantially reduced resistance to oxidation and corrosion compared to alloys C - F according to the invention. Alloy C has a particularly favorable resistance to oxidation, the mass loss or mass increase of which changes only slightly between 12h 40min and 100h.
Gute Oxidationsbeständigkeit weisen auch Abwandlungen der Legierung C auf, in denen der Chromgehalt kleiner 55, vorzugsweise kleiner 53, und grösser 41, vorzugsweise grösser 48, Atomprozent, der Molybdängehalt kleiner 35, vorzugsweise kleiner 20, und grösser 13 Atomprozent und der Siliciumgehalt kleiner 35 und grösser 25, vorzugsweise grösser 30, Atomprozent ist. Auch Abwandlungen der Legierung F, mit 35 - 55 Atomprozent Chrom, 13 - 35 Atomprozent Molybdän, 0,001 - 0,3 Atomprozent Yttrium und/oder 0 -10 Atomprozent Wolfram weisen noch eine ausreichend gute Oxidationsbeständigkeit aus. Durch Zulegieren von Wolfram und/oder Yttrium zur geringfügig abgewandelten Legierung C (Legierungen D und E) wurde die Oxidationsbeständigkeit gegenüber der Legierung C zwar etwas herabgesetzt, die Oxidationsbeständigkeit von Legierungen nach dem Stand der Technik jedoch ganz erheblich übertroffen und zugleich eine besonders gute mechanische Festigkeit erreicht.Modifications to alloy C in which the chromium content is less than 55, preferably less than 53, and greater than 41, preferably greater than 48, atomic percent, the molybdenum content less than 35, preferably less than 20, and greater than 13 atomic percent and the silicon content less than 35 and atomic percent is greater than 25, preferably greater than 30. Modifications of the alloy F, with 35-55 atomic percent chromium, 13-35 atomic percent molybdenum, 0.001-0.3 atomic percent yttrium and / or 0-10 atomic percent tungsten also show a sufficiently good oxidation resistance. By alloying tungsten and / or yttrium to the slightly modified alloy C (alloys D and E), the oxidation resistance compared to alloy C was somewhat reduced, but the oxidation resistance of alloys according to the prior art was considerably exceeded and at the same time a particularly good mechanical strength reached.
Die Probekörper für die Zeitstandversuche wurden auf 1300°C aufgeheizt und bei dieser Temperatur die wahre Kriechrate in Abhängigkeit von der wahren Spannung ermittelt. Hierbei zeigte es sich, dass durch das Zulegieren von Wolfram und/oder Yttrium die Kriechfestigkeit verdoppelt oder sogar verdreifacht wird.The test specimens for the creep rupture tests were heated to 1300 ° C. and the true creep rate as a function of the true voltage was determined at this temperature. It was found that alloying tungsten and / or yttrium doubled or even tripled the creep resistance.
Anhand von Stauchversuchen wurde indirekt die Duktilität der erfindungsgemässen Legierung ermittelt. Hierbei wurden die für Stauchversuche vorgesehenen Probekörper bei Temperaturen von 1100, 1200, 1300 und 1400°C gestaucht und bei jeder Temperatur der Stauchdruck an der 0,2%-Dehngrenze bestimmt. Es ergaben sich hierbei die in der nachfolgenden Tabelle zusammengestellten Werte des Stauchdrucks:
Ersichtlich konnte lediglich bei der besonders bevorzugten Legierung C bei der vergleichsweise tiefen Temperatur von 1100°C noch eine 0,2%-Dehngrenze erreicht werden. Diese Legierung zeichnet sich daher durch eine besonders gute Duktilität aus. Bei der im bevorzugten Bereich der stöchiometrischen Zusammensetzung liegenden Legierung G wurde noch bei 1200°C eine 0,2%-Dehngrenze erreicht. Auch diese Legierung zeichnet sich daher durch eine relativ gute Duktilität aus. Durch die festigkeitssteigernden Zusätze Wolfram und/oder Yttrium (Legierungen D und E) liegt eine 0,2%-Dehnung nur noch bei einer Temperatur von 1300°C vor, jedoch wird durch das Zulegieren von 2 bis 8 Atomprozent Wolfram und insbesondere durch das Zulegieren von 2 bis 8 Atomprozent Wolfram und 0,001 bis 0,3 Atomprozent Yttrium zur Legierung C oder einer bevorzugt abgewandelten Legierung mit 48 - 53 Chrom, 13 - 20 Molybdän und 30 - 35 Silicium eine besonders hohe Festigkeit erreicht.Obviously, a 0.2% proof stress could only be achieved with the particularly preferred alloy C at the comparatively low temperature of 1100 ° C. This alloy is therefore characterized by particularly good ductility. With the alloy G lying in the preferred range of the stoichiometric composition, a 0.2% proof stress was still reached at 1200 ° C. This alloy is therefore also characterized by a relatively good ductility. Due to the strengthening additives tungsten and / or yttrium (alloys D and E), there is only a 0.2% elongation at a temperature of 1300 ° C, however, by adding 2 to 8 atomic percent tungsten and especially by adding alloys from 2 to 8 atomic percent tungsten and 0.001 to 0.3 atomic percent yttrium to alloy C or a preferably modified alloy with 48-53 chromium, 13-20 molybdenum and 30-35 silicon achieves a particularly high strength.
Claims (4)
41 - 55 Chrom
13 - 35 Molybdän, und
25 - 35 Silicium
oder
35 - 55 Chrom
13 - 35 Molybdän
13 - 35 Silicium,
0,001 - 0,3 Yttrium, und/oder
0,001 - 10 Wolfram.Alloy based on a silicide containing at least chromium and molybdenum, characterized in that it contains the following components in atomic percent:
41 - 55 chrome
13-35 molybdenum, and
25-35 silicon
or
35-55 chrome
13-35 molybdenum
13-35 silicon,
0.001 - 0.3 yttrium, and / or
0.001-10 tungsten.
48 - 53 Chrom
13 - 20 Molybdän
30 - 35 SiliciumAlloy according to claim 1, characterized in that it contains the following components:
48-53 chrome
13-20 molybdenum
30-35 silicon
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59408967T DE59408967D1 (en) | 1994-10-17 | 1994-10-17 | Alloy based on a silicide containing at least chromium and molybdenum |
| EP94116323A EP0709478B1 (en) | 1994-10-17 | 1994-10-17 | Alloy based of silicides and further containing chromium and molybdenum |
| US08/530,091 US5718867A (en) | 1994-10-17 | 1995-09-19 | Alloy based on a silicide containing at least chromium and molybdenum |
| JP7249839A JPH08170143A (en) | 1994-10-17 | 1995-09-27 | Alloy based on silicide essentially consisting of chromium and molybdenum |
| CN95118431A CN1044009C (en) | 1994-10-17 | 1995-10-17 | Alloy containing silicide, based on at least one kind of Cr and Mo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP94116323A EP0709478B1 (en) | 1994-10-17 | 1994-10-17 | Alloy based of silicides and further containing chromium and molybdenum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0709478A1 true EP0709478A1 (en) | 1996-05-01 |
| EP0709478B1 EP0709478B1 (en) | 1999-12-01 |
Family
ID=8216390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94116323A Expired - Lifetime EP0709478B1 (en) | 1994-10-17 | 1994-10-17 | Alloy based of silicides and further containing chromium and molybdenum |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5718867A (en) |
| EP (1) | EP0709478B1 (en) |
| JP (1) | JPH08170143A (en) |
| CN (1) | CN1044009C (en) |
| DE (1) | DE59408967D1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2160790C2 (en) * | 1998-07-07 | 2000-12-20 | Институт физики твердого тела РАН | Heat-proof and heat-resisting composite material |
| CN100460111C (en) * | 2007-01-04 | 2009-02-11 | 北京科技大学 | High strength molybdenum siicide composite material and its preparation method |
| KR20100013859A (en) | 2008-08-01 | 2010-02-10 | 삼성디지털이미징 주식회사 | Apparatus and method for adjusting focus using modulation transfer fuction of lens in digital image processing device |
| US9540714B2 (en) | 2013-03-15 | 2017-01-10 | Ut-Battelle, Llc | High strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9377245B2 (en) | 2013-03-15 | 2016-06-28 | Ut-Battelle, Llc | Heat exchanger life extension via in-situ reconditioning |
| US10017842B2 (en) | 2013-08-05 | 2018-07-10 | Ut-Battelle, Llc | Creep-resistant, cobalt-containing alloys for high temperature, liquid-salt heat exchanger systems |
| US9435011B2 (en) | 2013-08-08 | 2016-09-06 | Ut-Battelle, Llc | Creep-resistant, cobalt-free alloys for high temperature, liquid-salt heat exchanger systems |
| US9683280B2 (en) | 2014-01-10 | 2017-06-20 | Ut-Battelle, Llc | Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9683279B2 (en) | 2014-05-15 | 2017-06-20 | Ut-Battelle, Llc | Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9605565B2 (en) | 2014-06-18 | 2017-03-28 | Ut-Battelle, Llc | Low-cost Fe—Ni—Cr alloys for high temperature valve applications |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1196974A (en) * | 1956-12-04 | 1959-11-27 | Union Carbide Corp | Composition and elements and coverings made from this composition |
| WO1993007302A1 (en) * | 1991-10-10 | 1993-04-15 | Battelle Memorial Institute | Oxidation-resistant refractory metal alloys |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3174853A (en) * | 1962-03-15 | 1965-03-23 | Gen Electric | Chromium base alloys |
| CH679312A5 (en) * | 1989-11-03 | 1992-01-31 | Asea Brown Boveri | |
| DE69321862T2 (en) * | 1992-04-07 | 1999-05-12 | Hashimoto, Koji, Sendai, Miyagi | Temperature resistant amorphous alloys |
| US5330590A (en) * | 1993-05-26 | 1994-07-19 | The United States Of America, As Represented By The Administrator Of The National Aeronautics & Space Administration | High temperature creep and oxidation resistant chromium silicide matrix alloy containing molybdenum |
-
1994
- 1994-10-17 EP EP94116323A patent/EP0709478B1/en not_active Expired - Lifetime
- 1994-10-17 DE DE59408967T patent/DE59408967D1/en not_active Expired - Fee Related
-
1995
- 1995-09-19 US US08/530,091 patent/US5718867A/en not_active Expired - Fee Related
- 1995-09-27 JP JP7249839A patent/JPH08170143A/en not_active Withdrawn
- 1995-10-17 CN CN95118431A patent/CN1044009C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1196974A (en) * | 1956-12-04 | 1959-11-27 | Union Carbide Corp | Composition and elements and coverings made from this composition |
| WO1993007302A1 (en) * | 1991-10-10 | 1993-04-15 | Battelle Memorial Institute | Oxidation-resistant refractory metal alloys |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59408967D1 (en) | 2000-01-05 |
| CN1044009C (en) | 1999-07-07 |
| JPH08170143A (en) | 1996-07-02 |
| EP0709478B1 (en) | 1999-12-01 |
| US5718867A (en) | 1998-02-17 |
| CN1130688A (en) | 1996-09-11 |
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