TUNGSTEN CATHODE MATERIAL

• Main Authors: MATSUO, AKIRA, UENO, YASUTSUGU, KAI, YUSUKE
• Format: Patent
• Language: English; French; German
• Published: 05.11.2014
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CABLES; CASTING; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CONDUCTORS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INSULATORS; MACHINE TOOLS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; PLASMA TECHNIQUE; POWDER METALLURGY; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM; WORKING METALLIC POWDER

Provided is a cathode material which becomes an alternative material of a cathode material formed of a W-ThO 2 alloy and is formed of a tungsten alloy that does not include thorium which is a radioactive element. When particles of a rare earth oxide and tungsten carbide are finely dispersed in a tungsten cathode material used as a discharge cathode material used in TIG, plasma spraying, plasma cutting, electrical discharge machining, discharge lamps and the like, reduction and diffusion of the rare earth oxide are accelerated, and supply of rare earth elements to a cathode surface is ensured, thereby improving discharge characteristics.