Two-phase chromium-niobium alloys exhibiting improved mechanical properties at high temperatures

Patent · 31 January 1994

OSTI ID:5264022

Liu, C T; Takeyama, Masao

The specification discloses chromium-niobium alloys which exhibit improved mechanical properties at high temperatures in the range of 1250 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. 14 figures.

• DOE Contract Number: AC05-84OR21400
• Assignee: PTO; EDB-94-064138
• Patent Number(s): US 5282907; A
• Application Number: PPN: US 7-915096
• OSTI ID: 5264022
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
RARE EARTH ALLOYS
RHENIUM ALLOYS