Pt or Pt alloy materials hardened by oxide dispersion, produced by inner oxidation and having proportions of oxide and good ductility
US8226855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2008 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Jul 2, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C32/0021
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A solid body of a metal alloy comprising less than 99% by weight of noble metal and more than 1% by weight of dispersion-strengthening metals is converted for production of a dispersion-strengthened platinum material by at least 90% oxidation of the dispersion-strengthening metals into a dispersion-strengthened platinum material. The dispersion-strengthened platinum material contains a noble metal component of platinum or a platinum alloy amounting to between 95 and 99% by weight and a dispersion-strengthening agent. The noble metal component includes at least 55% by weight Pt, 0 to 30% by weight Rh, 0 to 30% by weight Au, and 0 to 40% by weight Pd. The remaining proportion by mass of more than 1% by weight is a dispersion-strengthening agent, which contains at least one metal oxidized at least 90% by weight with oxygen, the metal being selected from the group of Ce, Zr, Sc, and Y.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.