Patent US3967355A successfully refreshed from Google Patents.
US3967355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite single crystal article
Assignee: RTX Corp
•
Filing: 1974-12-23
•
Granted: 1976-07-06
•
Expires: 1994-12-23
Abstract
Abstract This invention concerns composite articles, particularly those which contain single crystal components. A method is disclosed for joining single crystals together so that the resultant article is free from high angle grain boundaries and therefore possesses exceptional mechanical properties.
Inventors
- 👤 Anthony F. Giamei
- 👤 Bernard H. Kear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:34
CPC Classifications
C; C30; C30B; C30B11/00; C30B29/00; C30B29/10; C30B29/52; C30B33/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/1234; Y10T428/12493; Y10T428/12639; Y10T428/12646; Y10T428/12986
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A composite metallic crystalline article having good mechanical properties at elevated temperatures, consisting of at least two adjacent single crystal components bonded by a bond which is essentially identical in chemical composition to at least one of the single crystal components, said adjacent components having the following relationships: a. having identical crystal lattice structures in the plane of the at least one bond, b. having substantially identical lattice parameters, c. having substantially identical crystallograhic orientations, whereby the article, is characterized by the absence of mobile high angle grain boundaries in the region of the at least one bond.
Claim 2
Dependent Claim
98 words
A composite metallic crystalline article having good mechanical properties at elevated temperatures, consisting of at least two adjacent single crystal components bonded by a bond which is essentially identical in chemical composition to at least one of the single crystal components, said adjacent components having the following relationships: a. having identical crystal lattice structures in the plane of the at least one bond, b. having substantially identical lattice parameters, c. having substantially identical crystallograhic orientations, whereby the article, is characterized by the absence of mobile high angle grain boundaries in the region of the at least one bond.
Claim 3
Dependent Claim
64 words
A composite article as in claim 1 having a cubic crystal structure with three orthogonal axes wherein each component is related to adjacent components by rotations about the orthogonal axes which total less than about 10° and wherein the sum of the rotation about the orthogonal axes (in degrees) and the lattice parameter difference between components (expressed in percent) is less than about 12.
Claim 4
Dependent Claim
20 words
A composite article as in claim 1 wherein at least two of the single crystal components have different chemical compositions.
Claim 5
Dependent Claim
16 words
A composite article as in claim 1 wherein the bond is a solid state diffusion bond.
Claim 6
Dependent Claim
24 words
A composite article as in claim 1 further including at least one polycrystalline element bonded to at least one of the single crystal components.
Claim 7
Dependent Claim
51 words
A composite article as in claim 3 wherein at least two of the components have different properties and wherein at least one of the components is selected to have high mechanical properties at elevated temperatures and at least one of the components is selected to have good oxidation and corrosion resistance.
References Cited (Backward Citations)
US3826700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |