Hermetic electrical feedthrough comprising a Pt—Ni-based pin alloy

US11990252B2 · kind B2 · utility

Assignee

• National Technology & Engineering Solutions of Sandia, LLC · US

Inventors

• Donald F. Susan · Albuquerque, US
• Zahra Ghanbari · Albuquerque, US
• Steve X. Dai · Albuquerque, US
• Brenton Elisberg · Albuquerque, US
• Edward F. Smith, III · Madison, US
• Patrick Bowen · Durham, US

Key dates

• Filing date: Apr 12, 2021
• Grant date: May 21, 2024
• Expiry date: Jun 28, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/58
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A combination of materials and processing parameters have been developed for hermetic seals for electrical feedthroughs in high performance applications. A glass-ceramic forms a hermetic seal between a stainless steel shell and a platinum-nickel-based (Pt—Ni) pin alloy for electrical feedthroughs. The glass-ceramic is processed to develop a coefficient of thermal expansion (CTE) slightly higher than the pin alloy but lower than the stainless steel. The seal system employing the new processing conditions and Pt—Ni-based pin alloy alleviates several problems encountered in previous seal systems and improves the hermetic connector performance.