# US 4,392,047 A · Non-consumable electrode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,392,047 A - Document ID: US4392047A - Status: Granted - Kind: A - Application number: 06/231,464 - Filed: 1981-02-04 - Granted: 1983-07-05 - Earliest claimed: 1981-02-04 - Inventors: David G. Bykhovsky; Albert A. Voropaev; Evgeny F. Olennikov; Alla V. Lopatina - Web page: https://patentgrep.com/patent/US4392047A ## CPC - H05B 7/08: non-consumable - B23K 35/0205: {Non-consumable electrodes; C-electrodes} - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM ## Abstract A non-consumable electrode for use in arc and plasma devices in an inert gas atmosphere comprising a holder and an active portion made of a refractory metal with emission admixtures, the active portion being connected with the holder so that its outer side surface is exposed to a height exceeding 1/4 of a diameter thereof. ## Claims ### Claim 1 A non-consumable electrode for use in arc and plasma devices in an inert gas atmosphere, made in the form of a cylinder with a tip, comprising: a holder and an active portion, made of a refractory metal with emission admixtures, connected with said holder wherein the outer side surface of the active portion is exposed to a height exceeding 1/4 of the diameter thereof, whereby conditions for transfer of the material from the side surface of the active portion to a work surface thereof are provided. ### Claim 2 (depends on 1) A non-consumable electrode according to claim 1, wherein the active portion is made of a powder in which the refractory metal is tungsten in an amount of 60 to 95% by weight and the emission admixtures comprise rare-earth metals. ### Claim 3 (depends on 1) A non-consumable electrode according to claim 1, wherein the active portion is made of a powder in which the refractory metal is tungsten in an amount of 60 to 95% by weight and the emission admixtures comprise rare-earth metal compounds. ### Claim 4 (depends on 1) A non-consumable electrode according to claim 1, wherein the active portion is made of a powder in which the refractory metal is titanium in an amount of 70 to 99.5% by weight and the emission admixtures comprise rare-earth metals. ### Claim 5 (depends on 1) A non-consumable electrode according to claim 1, wherein the active portion is made of a powder in which the refractory metal is titanium in an amount of 70 to 99.5% by weight and the emission admixtures comprise rare-earth metal compounds. ### Claim 6 (depends on 1) A non-consumable electrode according to claim 1, wherein the active portion is an alloy comprising a refractory metal of Group IV A of the periodic system and the emission admixtures comprise rare-earth metals. ### Claim 7 (depends on 2) A non-consumable electrode according to claim 2, wherein the rare-earth metal is yttrium in amounts of 15 to 40% by weight. ### Claim 8 (depends on 2) A non-consumable electrode according to claim 2, wherein the rare-earth metal is gadolinium in amounts of 10 to 35% by weight. ### Claim 9 (depends on 2) A non-consumable electrode of claim 2, wherein the emission admixture comprises yttrium and gadolinium in percent by weight as follows: yttrium . . . 5-15 gadolinium . . . 10-25. ### Claim 10 (depends on 3) A non-consumable electrode according to claim 3, wherein the rare-earth metal compounds comprise yttrium compounds in amounts of 5 to 40% by weight. ### Claim 11 (depends on 3) A non-consumable electrode according to claim 3, wherein the rare-earth metal compounds comprise gadolinium compounds in amounts of 10 to 35% by weight. ### Claim 12 (depends on 3) A non-consumable electrode according to claim 3, wherein the rare-earth metal compound comprises a mixture of yttrium compounds and gadolinium compounds, the relation between the components in percent by weight being as follows: yttrium compounds . . . 7-20 gadolinium compounds . . . 12-35. ### Claim 13 (depends on 4) A non-consumable electrode according to claim 4, wherein the rare-earth metal is cerium in amounts of 0.5 to 4% by weight. ### Claim 14 (depends on 4) A non-consumable electrode according to claim 4, wherein the rare-earth metal is dysprosium in amounts of 0.5 to 5% by weight. ### Claim 15 (depends on 4) A non-consumable electrode according to claim 4, wherein the rare-earth metal is gadolinium in amounts of 1 to 10% by weight. ### Claim 16 (depends on 4) A non-consumable electrode according to claim 4, wherein the rare-earth metal is neodymium in amounts of 1 to 8% by weight. ### Claim 17 (depends on 4) A non-consumable electrode according to claim 4, wherein the rare-earth metal is terbium in amounts of 0.5 to 5% by weight. ### Claim 18 (depends on 5) A non-consumable electrode according to claim 5, wherein the rare-earth metal compounds are cerium compounds in amounts of 0.5 to 5% by weight. ### Claim 19 (depends on 5) A non-consumable electrode according to claim 5, wherein the rare-earth metal compounds are dysprosium compounds in amounts of 0.5 to 5% by weight. ### Claim 20 (depends on 5) A non-consumable electrode according to claim 5, wherein the rare-earth metal compounds are gadolinium compounds in amounts of 1 to 30% by weight. ### Claim 21 (depends on 5) A non-consumable electrode according to claim 5, wherein the rare-earth metal compounds are neodymium compounds in amounts of 1 to 8% by weight. ### Claim 22 (depends on 5) A non-consumable electrode according to claim 5, wherein the rare-earth metal compounds are terbium compounds in amounts of 0.5 to 5% by weight. ### Claim 23 (depends on 6) A non-consumable electrode according to claim 6, comprising an alloy containing titanium in amounts of 90 to 99.5% and the rare-earth metal is gadolinium in amounts of 0.5 to 10% by weight. ### Claim 24 (depends on 6) A non-consumable electrode according to claim 6, wherein the alloy comprises titanium in amounts of 95 to 99.5% and the rare-earth metal is cerium in amounts of 0.5 to 5% by weight. ### Claim 25 (depends on 6) A non-consumable electrode according to claim 6, wherein the alloy comprises zirconium in amounts of 90 to 99.5% and the rare-earth metal is gadolinium in amounts of 0.5 to 10% by weight. ### Claim 26 (depends on 6) A non-consumable electrode according to claim 6, wherein the alloy comprises zirconium in amounts of 95 to 99.5% and the rare-earth metal is cerium in amounts of 0.5 to 5% by weight. ### Claim 27 (depends on 7) A non-consumable electrode according to claim 7, wherein the alloy comprises titanium in amounts of 95 to 99.5% and the rare-earth metal compounds are cerium compounds in amounts of 0.5 to 5% by weight. ### Claim 28 (depends on 7) A non-consumable electrode according to claim 7, wherein the alloy comprises zirconium in amounts of 95 to 99.5% and the rare-earth metal compounds are cerium compounds in amounts of 0.5 to 5% by weight. ### Claim 29 A non-consumable electrode for use in plasma devices in an inert gas atmosphere, made in the form of a cylinder with a tip, comprising: a holder and an active portion, made of an alloy comprising a refractory metal of Group IV A of the periodic system and emission admixtures of rare-earth metal compounds, connected to said holder wherein the outer side surface of the active portion is exposed to a height exceeding 1/4 of the diameter thereof. ### Claim 30 A non-consumable electrode for use in arc and plasma devices in an inert gas atmosphere, made in the form of a cylinder with a tip, comprising: a holder and an active portion, connected to said holder, wherein the outer side surface of the active portion is exposed to a height exceeding 1/4 of the diameter thereof, the active portion being made from a refractory metal powder comprising titanium in amounts of 98 to 99.5% and an emission admixture comprising praseodymium in an amount of 0.5 to 2% by weight. ### Claim 31 A non-consumable electrode for use in arc and plasma devices in an inert gas atmosphere, made in the form of a cylinder with a tip, comprising: a holder and an active portion connected to said holder wherein the outer side surface is exposed to a height exceeding 1/4 of the diameter thereof, the active portion being made from a powder of a refractory metal comprising titanium in an amount of 95 to 99.5% by weight and an emission admixture comprising praseodymium compounds in amounts of 0.5 to 2% by weight.