The SG-100 spray gun is used for preparing plasma thermal barrier coatings with a bonding underlayer plus a ceramic topcoat.

The SG-100 plasma torch, widely recognized in the industry as a high-performance thermal spraying device, has become a key tool for preparing high-temperature protective coatings thanks to its high power output, flexible configuration, and proven process stability.

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Thermal Spray Equipment Accessories (Wear Parts)

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Product Description

The SG-100 spray gun is used for preparing plasma thermal barrier coatings with a bonding underlayer plus a ceramic topcoat.

SG-100 Plasma spray gun Introduction

SG-100 As an industry-recognized high-performance thermal spraying device, the plasma torch has become a core tool for preparing high-temperature protective coatings thanks to its high power output, flexible configuration, and mature process stability. The key design highlights of this equipment include:

l Multi-mode powder delivery system: Supports internal powder feeding, external powder feeding, or coordinated operation of dual powder feed ports. The internal powder feeding design precisely injects powder into the high-energy zone of the plasma flame, significantly enhancing particle melting efficiency and coating density.

l Gas Compatibility and Scalability: Compatible with a variety of process gases including argon, nitrogen, and helium, and paired with different nozzle kits (such as subsonic and Mach-level nozzles), this system enables precise control over flame velocity and temperature, making it suitable for a wide range of deposition applications—from metal alloys to ceramic materials.

l Efficient maintenance design: A modular structure combined with long-life electrode design significantly reduces equipment downtime and lowers overall operation and maintenance costs.

As a mature device that has been proven by the market, SG-100 Thermal barrier coatings for high-temperature components such as gas turbine blades, aeroengine combustion chambers, and turbine guide vanes... TBCs ) Plays an important role in preparation.

Application Scenarios and Functions of Thermal Barrier Coatings

Thermal barrier coatings are primarily used on critical components—such as gas turbine blades, combustion chambers, and turbine parts of aero-engines—that are subjected to extreme temperatures and mechanical stresses. Their core function is:

l Thermal insulation protection: The low thermal conductivity of the ceramic layer reduces the operating temperature of the base alloy, thereby delaying high-temperature creep and oxidation.

l Stress buffering: Bonding layer ( MCrAlY The alloy coordinates the thermal expansion coefficient differences between the ceramic layer and the substrate (such as a nickel-based superalloy), thereby preventing interfacial cracking and delamination.

l Antioxidant and Anti-Corrosion Properties: In the Bonding Layer Al 、 Cr The element forms a dense structure at high temperatures. Al ₂ O 3 and Cr ₂ O The oxide film prevents oxygen and corrosive media from diffusing inward.

Take the turbine blades of aircraft engines as an example: blades without thermal barrier coatings rely on complex cooling systems, whereas after coating, the demand for cooling airflow is significantly reduced, markedly improving thermal efficiency and extending service life.

SG-100 Process advantages in the preparation of thermal barrier coatings

The typical structure of a thermal barrier coating is: Ceramic surface layer ( YSZ ) + Bonding primer ( MCrAlY ), where the primary function of the metallic bonding underlayer is to firmly bond the ceramic top layer to the substrate metal, while the ceramic top layer primarily serves to provide thermal insulation and corrosion resistance. Its preparation must strike a balance between high deposition efficiency and coating performance. SG-100 Process adaptability is particularly critical in this process:

1. Bonding layer spraying

l Material selection: Adopt NiCoCrAlY Alloy, in which Al To ensure selective oxidation occurs on the surface of the bonding layer and to extend the coating's service life under high-temperature oxidation conditions, the content is generally controlled within: 8-12% ; Constituent elements Cr It is primarily used to enhance the oxidation resistance and sulfur resistance of the bond, and its oxidation forms... Cr2O3 The membrane serves to protect the base alloy; trace amounts of rare-earth elements. Y ( 0.3–1% ) It can refine grain size and enhance the adhesion of the oxide film.

l Process parameters: Using argon as the primary gas and helium as the secondary gas, the internal powder-feeding mode ensures that the alloy powder is fully melted, forming a dense bonding layer free of brittle phases (thickness: [blank]). 80-150 mu m ).

2. Ceramic surface coating spray

l Material selection: Partially stabilized zirconia with yttria ( YSZ ), among which Y ₂ O ₃ The addition amount is 6-8% (Mass fraction). Y ₂ O 3. An unstable tetragonal phase is formed via solid-solution effects and remains stable under high-temperature thermal cycling, thereby avoiding volume changes caused by phase transformations and significantly enhancing thermal shock resistance. YSZ Its low thermal conductivity and excellent phase stability make it the material of choice for high-temperature thermal barrier coatings.

l Process parameters: A mixed gas of argon and helium, optimizing plasma flame temperature and particle kinetic energy. Combined with controllable flame flow velocity. SG-100 Nozzle, control YSZ The particles are in a molten state, forming a columnar crystal structure that enhances the coating's thermal shock resistance.

SG-100 The dual-powder-feed port design also enables one-step deposition of gradient coatings or composite coatings, for example in... MCrAlY Surface pre-deposition enrichment Al Layer to accelerate Al ₂ O 3) Membrane formation, thereby reducing the oxidation rate.

SG-100 Core consumable supply and industry alignment

As a specialized supplier in the field of plasma spray consumables, we focus on providing... SG-100 The spray gun and similar equipment offer customized anode and cathode solutions. The anode and cathode models we currently supply are compatible with: SG-100 Spraying equipment's 1083A-720、 3083-129 、 2083-730 、1083A-112、1083A-104、 3083-145 、 3083-165 、 3083-175 、 2083-355 、 2083-358 、 2083-155 、 2083-100 、 2083-611 、 2083-484 Same model; meanwhile, our products are fully compatible. Metco 、 Praxair 、 FST 、 GTV 、 Progressive Surface We provide end-to-end services for mainstream global equipment, offering everything from standard consumables to customized process support. We strictly adhere to the technical standards of each brand’s equipment, ensuring precise matching of anode and cathode dimensions, materials, and electrical performance, thereby delivering highly compatible and reliable consumable support to customers worldwide.

SG-100 Plasma spraying equipment, with its high-energy plasma control and multi-dimensional process adaptability, has become the benchmark technology for industrial-scale production of thermal barrier coatings. As performance requirements for high-temperature components continue to rise, the synergistic optimization of coating material systems and deposition processes will emerge as a key development direction. We remain committed to providing the industry with highly reliable consumables and innovative solutions, thereby driving the deeper integration of plasma spraying technology into high-end manufacturing sectors.

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