Sintered silver-iron material for electrical contacts and process for producing it

US5985440A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Wolfgang Weise · Frankfurt, DE
• Willi Malikowski · Aschaffenburg, DE
• Roger Wolmer · Gelnhausen, DE
• Peter Braumann · Alzenau, DE
• Andreas Koffler · Meißen, DE

Key dates

• Filing date: Feb 27, 1997
• Grant date: Nov 16, 1999
• Expiry date: Feb 27, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2813
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Sintered silver-iron material for electrical contacts, with properties comparable with those of silver-nickel materials, is obtained by using iron powder having more than 0.25% carbon by weight and microhardness higher than 200 HV 0.025 and sintering in a hydrogen-free protective gas.