Composite metal as a contact material for vacuum switches

US4032301A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Heinrich Hassler · Wendelstein, DE
• Horst Kippenberg
• Horst Schreiner

Key dates

• Filing date: May 6, 1976
• Grant date: Jun 28, 1977
• Expiry date: May 6, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1216
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A contact material for vacuum switches comprising a composite inclusion metal of at least two metal components in which a first component has an electric conductivity of at least 10 m/ohm mm.sup.2, the share of this component being between 35 and 60% by volume. At least one component has a melting point of at least 1400.degree. C and at least one component is effective as a getter. These components are embedded in the first component, with only isolated bridges existing between the finely distributed inclusions. The porosity of the composite inclusion metal is less than 2% by volume.