Tungsten Copper as High-Voltage Discharge Electrodes
In high-voltage discharge systems, the selection of electrode materials is critical to the efficiency, reliability, and lifespan of the device. Tungsten copper (W-Cu) alloys, combining the high melting point and arc resistance of tungsten with the excellent electrical and thermal conductivity of copper, are widely regarded as ideal materials for high-voltage discharge electrodes.
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Advantages of W-Cu for High-Voltage Discharge Electrodes
1.Superior Arc Erosion Resistance
With tungsten's ultra-high melting point and chemical stability, W-Cu electrodes resist arc erosion even under intense kilovolt-level discharges, significantly prolonging service life.
2.Excellent Electrical and Thermal Conductivity
The copper phase ensures efficient current flow and rapid heat dissipation, preventing localized overheating and enhancing system stability during repetitive discharges.
3.High Thermal Stability
W-Cu can withstand the high thermal shocks caused by pulsed discharges without cracking or degradation, maintaining structural integrity over prolonged operation.
4.Anti-Adhesion to Molten Metals
W-Cu's resistance to sticking and fusing under arcing conditions helps prevent electrode melting or welding to the target, improving discharge consistency and repeatability.
Typical Application Scenarios
1.Pulsed Power Discharge Systems (e.g., capacitor bank discharges)
2.Plasma Ignition Devices and HV Laser Trigger Units
3.Switch Contacts in High-Voltage Pulse Transformers
4.Defense, aerospace, and scientific research HV discharge facilities
Common Grades and Electrode Designs
Grades: W75Cu25, W80Cu20, W85Cu15 (depending on discharge energy and repetition rate)
Forms: Rod electrodes, block electrodes, needle-shaped tips, and custom geometries
Surface Finish: Precision polishing or specialized coatings for improved discharge stability
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