Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures
US5282907A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Jul 16, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C27/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The specification discloses chromium-niobium alloys which exhibit improved mechanical properties at high temperatures in the range of 1250.degree. C. and improved room temperature ductility. The alloys contain a Cr.sub.2 Nb-rich intermetallic phase and a Cr-rich phase with an overall niobium concentration in the range of from about 5 to about 18 at. %. The high temperature strength is substantially greater than that of state of the art nickel-based superalloys for enhanced high temperature service. Further improvements in the properties of the compositions are obtained by alloying with rhenium and aluminum; and additional rare-earth and other elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.