High temperature oxidation resistant co-based gamma/gamma prime alloys DMREF-Co

US11725263B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Tresa M. Pollock · Pittsburgh, US
• Colin A. Stewart · Goleta, US
• Sean P. Murray · Goleta, US
• Carlos G. Levi · Midland School, US

Key dates

• Filing date: Apr 4, 2019
• Grant date: Aug 15, 2023
• Expiry date: Apr 1, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/25
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A series of alloys of Co, Ni, Al, W, Ta, and Cr, wherein the alloy comprises a solid solution of gamma and gamma prime alloy phases, the Ni content is greater than 25% at. %, the Al content is greater than 10 at. %, the Cr content is greater than 2 at. %, and the Ni:Co ratio is between 0.5 and 1.5. In one or more examples, the alloy further comprises one or more of C, B, and a reactive element metal. Embodiments of the alloy simultaneously possess a high solvus temperature, a high fraction of the strengthening γ′-L12 phase, good oxidation resistance and highly favorable solidification characteristics.