Aluminum superalloys for use in high temperature applications
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C22C-021/02
C22C-021/06
C22F-001/04
C22C-021/00
C22C-001/02
출원번호
US-0645654
(2015-03-12)
등록번호
US-9453272
(2016-09-27)
발명자
/ 주소
Vo, Nhon Q
Seidman, David N
Dunand, David C
출원인 / 주소
NanoAl LLC
대리인 / 주소
Hahn Loeser & Parks, LLP
인용정보
피인용 횟수 :
1인용 특허 :
8
초록▼
Aluminum-zirconium and aluminum-zirconium-lanthanide superalloys are described that can be used in high temperature, high stress and a variety of other applications. The lanthanide is preferably holmium, erbium, thulium or ytterbium, most preferably erbium. Also, methods of making the aforementioned
Aluminum-zirconium and aluminum-zirconium-lanthanide superalloys are described that can be used in high temperature, high stress and a variety of other applications. The lanthanide is preferably holmium, erbium, thulium or ytterbium, most preferably erbium. Also, methods of making the aforementioned alloys are disclosed. The superalloys, which have commercially-suitable hardness at temperatures above about 220° C., include nanoscale Al3Zr precipitates and optionally nanoscale Al3Er precipitates and nanoscale Al3(Zr,Er) precipitates that create a high-strength alloy capable of withstanding intense heat conditions. These nanoscale precipitates have a L12-structure in α-Al(f.c.c.) matrix, an average diameter of less than about 20 nanometers (“nm”), preferably less than about 10 nm, and more preferably about 4-6 nm and a high number density, which for example, is larger than about 1021 m−3, of the nanoscale precipitates. The formation of the high number density of nanoscale precipitates is thought to be due to the addition of inoculant, such as a Group 3A, 4A, and 5A metal or metalloid. Additionally, methods for increasing the diffusivity of Zr in Al are disclosed.
대표청구항▼
1. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale precipitate comprising Al3Zr, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the
1. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale precipitate comprising Al3Zr, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the inoculant comprises one or more of Sn, In, Sb or Mg. 2. The aluminum alloy of claim 1, wherein the alloy contains no detectable amount of scandium up to about 0.04 at. % scandium (Sc). 3. The aluminum alloy of claim 1, further comprising a lanthanide series metal. 4. The aluminum alloy of claim 1, wherein the precipitate has an average diameter of about 10 nm or less, measured by atom-probe tomography technique. 5. The aluminum alloy of claim 1, wherein the nanoscale precipitate has an average diameter of about 4-6 nm. 6. The aluminum alloy of claim 1, wherein the nanoscale precipitate comprises Al3Zr, Al3Er, and Al3(Zr,Er). 7. The aluminum alloy of claim 1, further comprising a lanthanide series metal, and the alloy including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3X precipitates, and nanoscale Al3(Zr,X) precipitates having an L12 structure, wherein X is a lanthanide series metal. 8. The aluminum alloy of claim 1, further comprising a lanthanide series metal, and the alloy including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3X precipitates, and nanoscale Al3(Zr,X) precipitates having an L12 structure, wherein X is one or more of Ho, Er, Tm, and Yb. 9. The aluminum alloy of claim 1, further comprising a lanthanide series metal, and the alloy including a plurality of nanoscale Al3Zr precipitates and nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having an L12 structure. 10. The aluminum alloy of claim 1, wherein the inoculant comprises one or more of Sn, In and Sb, and the alloy being essentially scandium (Sc) free. 11. The aluminum alloy of claim 1, wherein the inoculant comprises one or more of Sn, In and Sb, and the alloy having less than about 0.04 at. % scandium (Sc). 12. The aluminum alloy of claim 1, further comprising Er and wherein the inoculant is one or more of Sn, In, and Sb, the alloy being essentially scandium-free and including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having a L12-structure. 13. The aluminum alloy of claim 1, wherein the nanoscale precipitate comprises Al3Zr, Al3Er, and Al3(Zr,Er) and the precipitates have an average diameter of about 10 nm or less. 14. The aluminum alloy of claim 1, wherein the nanoscale precipitate comprises Al3Zr, Al3Er, and Al3(Zr,Er) and the precipitates have an average diameter of about 4-6 nm. 15. An aluminum alloy component selected from the group of components consisting of a brake rotor, a piston, an auxiliary power unit, an auxiliary power unit frame, a mounting bracket, an aircraft engine exhaust duct comprising the aluminum alloy of claim 1. 16. The aluminum alloy of claim 1, wherein the inoculant comprises Sn. 17. The aluminum alloy of claim 1, wherein the inoculant comprises In. 18. The aluminum alloy of claim 1, wherein the inoculant comprises Sb. 19. The aluminum alloy of claim 1, wherein the inoculant comprises Mg. 20. An aluminum alloy comprising aluminum zirconium an inoculant and a nanoscale precipitate comprising Al3Zr, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the inoculant comprises one or more of Ga, Ge, Pb, As or Bi. 21. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.3 at. % Zr, about 1.5 at. % Si, about 0.1 at. % Sn, about 0.1 at. % In, about 0.1 at. % Sb, the balance being Al. 22. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.1 at. % Zr, about 0.01 at. % Sn, the balance being aluminum. 23. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.1 at. % Zr, about 0.02 at. % Sn, the balance being aluminum. 24. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.06 at. % Zr, about 0.02 at. % In, the balance being aluminum. 25. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.3 at. % Zr, about 0.05 at. % Er, about 1.5 at. % Si, about 0.1 at. % Sn, about 0.1 at. % In, about 0.1 at. % Sb, the balance being aluminum, the alloy further including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having an L12-structure. 26. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.1 at. % Zr, about 0.04 at. % Er, about 0.01 at. % Sn, and the balance being aluminum, the alloy including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having an L12-structure. 27. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.1 at. % Zr, about 0.04 at. % Er, about 0.02 at. % Sn, the balance being aluminum, the alloy including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having an L12-structure. 28. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.1 at. % Zr, about 0.04 at. % Er, about 0.2 at. % Si, the balance being aluminum, the alloy including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having an L12-structure. 29. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.1 at. % Zr, about 0.04 at. % Er, about 0.02 at. % In, the balance being aluminum, the alloy including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having an L12-structure. 30. An aluminum alloy comprising aluminum, zirconium, an inoculant, and a nanoscale Al3Zr precipitate, wherein the nanoscale precipitate has an average diameter of about 20 nm or less and has an L12 structure in an α-Al face centered cubic matrix, wherein the average number density of the nanoscale precipitate is about 1021 m−3 or more, and wherein the alloy is about 0.1 at. % Zr, about 0.04 at. % Er, about 0.02 at. % Sb the balance being aluminum, the alloy including a plurality of nanoscale Al3Zr precipitates, nanoscale Al3Er precipitates, and nanoscale Al3(Zr,Er) precipitates having an L12-structure. 31. An aluminum alloy having the combination Al—Zr—Er—X—Si, wherein X comprises one or more of Sn, In, or Sb, Si is an alloying element, the alloy having no more than about 0.17 at. % Si, and the alloy including a plurality of Al3Zr, Al3Er, and Al3(Zr,Er) nanoscale precipitates having an L12-structure wherein the average number density of the nanoscale precipitates is about 1021 m−3 or more.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Angers Lynette M. (1120 Fox Hill Dr. ; #315 Monroeville PA 15146) Konitzer Douglas G. (3865 Franklintown Dr. Murrysville PA 15668) Murray Joanne L. (5744 Kentucky Ave. Pittsburgh PA 15232) Truckner W, Alloys for high temperature applications.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.