Tungsten Electrode in Plasma Spraying
Tungsten electrode is the core electrode in plasma spray guns, responsible for initiating and maintaining a stable plasma arc in plasma spraying systems. Since the electrode is continuously exposed to high-temperature arc impacts and thermal cycling, it must provide excellent electron emission performance, arc erosion resistance, and high-temperature stability. And rare earth tungsten electrodes have become the mainstream choice for plasma spraying equipment.
1. Working Principle of Tungsten Electrodes in Plasma Spraying
The tungsten electrode serves as the cathode and forms an arc with the nozzle anode inside the plasma spray gun. When the working gas passes through the arc zone, it is rapidly ionized into a high-temperature plasma and expelled through the nozzle at high velocity, forming a plasma jet. Spray powder injected into the plasma stream is heated, melted, and accelerated toward the substrate surface, where it forms a coating. With a melting point of 3422°C, tungsten can maintain structural stability in high-temperature arc environments and continuously provide stable electron emission, ensuring reliable and continuous spraying operations.
2. Types of CTIA’s Tungsten Electrodes in Plasma Spraying
The types, characteristics, and applications of CTIA’s tungsten electrodes for plasma spraying are shown in the picture below:
3. Applications of CTIA’s Tungsten Electrodes in Plasma Spraying
CTIA’s tungsten electrodes are used in: (1) thermal barrier coating deposition for aircraft engines; (2) wear-resistant coatings for gas turbines; (3) corrosion-resistant coatings for petrochemical equipment; (4) wear-resistant surface enhancement of mechanical components; (5) functional coatings for electronics and semiconductors; and (6) surface engineering treatments for new energy equipment.
4. Specifications of CTIA’s Tungsten Electrodes for Plasma Spraying
(1) Materials: ceriated, lanthanated, thoriated, rare earth tungsten electrode
(2) Diameter: 1.0–6.4 mm, customizable
(3) Length: 50 mm, 75 mm, 150 mm, and 175 mm, customizable
(4) Note: CTIA provides customized tungsten electrode solutions for plasma spraying applications according to customer requirements
CTIA GROUP has over 30 years of experience in tungsten electrode manufacturing, supported by integrated capabilities in tungsten powder processing, powder metallurgy, high-temperature sintering, and precision machining. CTIA’s tungsten electrodes for plasma spraying are available in customized specifications, delivering reliable performance and long service life for aerospace, energy, medical, and advanced manufacturing industries.
For any inquiry, please contact tungsten electrode manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: www.tungsten.com.cn
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