CONTACT FOR VACUUM VALVE, AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To achieve improvement of insulation performance by removing an oxidation membrane formed on the contact surface and by exposing a fine layer in which Cr particles are micronized. SOLUTION: The contact for a vacuum valve is used for a vacuum valve having a pair of contacts 5, 6 free in contacting and separating. A mutual contact face of the contacts 5, 6 consists of: a base material layer 5a formed with prescribed volumes of conductive components and arc-proof components blended and sintered; a fine layer 5b formed on the surface of base material layer 5a with the arc-proof components dissolved and micronized by high energy irradiation; and a polished layer 5c which exposes the particles of the arc-proof components by polishing the surface of the fine layer 5b. COPYRIGHT: (C)2011,JPO&INPIT