Oxide strengthened molybdenum-rhenium alloy
US6102979A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Aug 28, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a method of making an ODS molybdenum-rhenium alloy which includes the steps of: PA1 (a) forming a slurry containing molybdenum oxide and a metal salt dispersed in an aqueous medium, the metal salt being selected from nitrates or acetates of lanthanum, cerium or thorium; PA1 (b) heating the slurry in the presence of hydrogen to form a molybdenum powder comprising molybdenum and an oxide of the metal salt; PA1 (c) mixing rhenium powder with the molybdenum powder to form a molybdenum-rhenium powder; PA1 (d) pressing the molybdenum-rhenium powder to form a molybdenum-rhenium compact; PA1 (e) sintering the molybdenum-rhenium compact in hydrogen or under a vacuum to form a molybdenum-rhenium ingot; and PA1 (f) compacting the molybdenum-rhenium ingot to reduce the cross-sectional area of the molybdenum-rhenium ingot and form a molybdenum-rhenium alloy containing said metal oxide. The present invention also provides an ODS molybdenum-rhenium alloy made by the method. A preferred Mo--Re-ODS alloy contains 7-14 weight % rhenium and 2-4 volume % lanthanum oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.