Tungsten alloy

Product overview
During plasma spraying, metal or ceramic powder is melted in a plasma arc and propelled at high speed onto the component to be coated. These electrodes are designed for use in plasma spray guns and withstand transient plasma temperatures above 12,000 °C. A back‑cast manufacturing process creates a metallurgical bond between tungsten and copper, ensuring stable operating conditions and extended service life.

Main benefits

• High resistance to extreme, short‑term plasma temperatures
• Radiation‑free options available (thorium‑free tungsten‑lanthanum variants)
• Long service life under industrial spraying conditions
• Good ignition capability for reliable torch start
• Optimal thermal conductivity for temperature management

Available standard nozzles and electrodes (examples in stock)

• Nozzles: PN‑F4‑6, PN‑F1‑6, PN‑G‑W / PN‑GH‑W
• Electrodes: PE‑F4; PE‑F1‑45 / PE‑F1‑90; PE‑3M63 / PE‑7M63 / PE‑9M63

Additional supply options
Finished electrodes and semifinished blanks for back‑cast tungsten‑copper electrodes are available on request to accommodate machining or custom production requirements.

Thorium‑free alternative
Thorium‑free plasma spray electrodes based on tungsten‑lanthanum (lanthanum‑oxide doped) are offered as an environmentally friendly, high‑performance alternative. Independent studies (University of Leoben) report improved ignition properties and reduced wear for lanthanum‑doped tungsten electrodes compared with thorium‑containing types.

Technical specifications

• Material: tungsten‑copper (back‑cast W–Cu); alternative: tungsten‑lanthanum (thorium‑free)
• Plasma temperature resistance: withstands transient plasma temperatures > 12,000 °C
• Manufacturing: back‑casting process ensuring metallurgical bond between W and Cu
• Typical stocked nozzle types: PN‑F4‑6, PN‑F1‑6, PN‑G‑W, PN‑GH‑W
• Typical stocked electrode types: PE‑F4, PE‑F1‑45, PE‑F1‑90, PE‑3M63, PE‑7M63, PE‑9M63
• Key performance: good ignition, high thermal conductivity, long life; lanthanum‑doped variants show reduced wear
• Supply options: finished electrodes and semifinished blanks for machining or customisation