Aluminum-based amorphous alloys are emerging as a promising class of structural materials due to their exceptional properties, including high specific strength, excellent toughness, superplasticity, and superior wear and corrosion resistance. These characteristics make them highly attractive for a wide range of engineering applications. However, traditional methods such as rapid quenching or mechanical alloying typically produce thin strips, wires, or powders, which require additional forming processes to be transformed into bulk materials. Conventional techniques like warm extrusion, hot extrusion, kinetic energy molding, powder rolling, injection molding, ultra-high-pressure consolidation, and electric spark sintering can yield high-quality amorphous alloys, but they are often complex, time-consuming, and costly, limiting their industrial scalability.
Thermal spraying technology offers a more efficient and cost-effective alternative for producing amorphous coatings. This method allows for rapid heating and solidification of the material, which is ideal for forming amorphous structures. Additionally, it leverages the advantages of high efficiency, low cost, and good coating quality, making it suitable for creating protective layers with excellent wear and corrosion resistance. As a result, thermal spraying has become a promising technique for fabricating aluminum-based amorphous coatings, opening new possibilities in material science and industrial applications.
Currently, plasma spraying, supersonic flame spraying, and high-speed arc spraying are among the most common thermal spray techniques used for preparing amorphous alloys. Plasma and supersonic flame spraying rely on pre-fabricated amorphous powders, while high-speed arc spraying integrates material preparation and coating formation by using core wires containing amorphous-forming elements. Although high-speed arc spraying has been successfully applied to Fe-based amorphous nanocrystalline coatings, its use in producing aluminum-based amorphous coatings is still an emerging area of research.
Recent studies conducted at the Academy of Armored Forces Engineering have demonstrated the successful application of high-speed arc spraying to fabricate aluminum-based amorphous nanocrystalline composite coatings. The system used a robot-controlled high-speed spray gun and a custom-developed power supply. Before spraying, the substrate was grit-blasted to ensure proper adhesion. Optimized process parameters included a spray voltage of 34V, current of 120A, air pressure of 0.7MPa, and a spray distance of 200mm. The resulting coating exhibited strong adhesion to the substrate, a dense structure with minimal porosity, and a typical layered morphology with tight interlayer bonding. The coating contained both amorphous and crystalline phases, and its micro-hardness reached approximately HV311, comparable to that of conventionally produced aluminum-based amorphous alloys. These results suggest that this material could serve as a viable alternative for anti-corrosion coatings in the future.
The research also highlights the potential of high-speed arc spraying for large-area coating applications. During the process, molten droplets cool rapidly upon impact with the substrate, facilitating the formation of amorphous or nanocrystalline structures. With a high deposition rate and relatively low cost, this technique holds significant promise for scalable and economical production of aluminum-based amorphous coatings in industrial settings.
NINGBO DOTEC is a pulse Valve Diaphragm manufacturer and supplier in China for many years. We have various diaphragms for different brands of pulse valves. Pls just tell us your Pulse Valve model or diaphragm model, then we will check it out and offer you price accordingly.
Different Options:
1. Diaphragm Sheet Material: NBR, EPDM, FKM, TPE, TPEE, HYTREL, etc
2. Diaphragm Seat Material: NBR, EPDM, FKM, Nylon, TPE, TPEE, PTFE, etc
3. Suitable Pulse Valve Size: from 1/2'' to 4''
4. Customization: If you have a drawing or can provide a sample, we can make the same diaphragm as yours
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