Electromagnetically enhanced Physical Vapor Deposition

EPVD technology
TypeCoating
InventorParadigm Shift Technologies, Inc
Websitehttps://paradigmshift.com/

Electromagnetically-enhanced Physical Vapor Deposition (EPVD) is coating technique developed by Paradigm Shift Technologies, Inc. which uses electromagnetic fields to improve traditional physical vapor deposition, particularly in high-stress applications like gun barrel coatings.[1][2]

History

EPVD technology was developed by a Paradigm Shift Technologies, Inc., a Canadian company founded in 1995. It was invented to replace the traditional chrome plating.[1]

Thin-film deposition is the overarching technology from which PVD, CVD, ALD, EBPVD, and EPVD are derived, each employing different methods to achieve specific coating characteristics. PVD (Physical Vapor Deposition) involves the physical vaporization of material in a vacuum to form a thin film, while EBPVD (Electron Beam Physical Vapor Deposition) uses an electron beam to vaporize the source material more efficiently.

EPVD (Electro-magnetically enhanced Physical Vapor Deposition), on the other hand, enhances the standard PVD process by utilizing electromagnetic fields to guide the deposition. This allows coatings to be applied to non-line-of-sight internal surfaces, such as the interiors of tubular components, resulting in much thicker, more robust, and uniform coatings compared to traditional PVD methods. This advanced process not only improves the durability of the coating but also enables the use of these coatings in more complex geometries, making it highly advantageous in industries requiring extreme wear resistance[3]

Process overview

EPVD involves vaporizing the coating material in vacuum and depositing it onto the substrate. Electromagnetic fields are applied to control the deposition rate and ensure uniform coating thickness, resulting in superior coating properties.[1] In this process, the material is removed from a target made from the refractory alloy and deposited on the bore of the gun barrel in a low-pressure, inert environment.[4][5]

The EPVD process generates thick coatings (50 to 300 microns) needed for gun barrels and can be adapted for small, medium, and large calibers. It applies engineered multilayer coatings using mostly metallic or ceramic materials, predominantly featuring tantalum, tungsten, and other refractory metals.[citation needed]

Applications

EPVD technology is mainly used in the defense industry for coating gun barrels, enhancing accuracy, durability, and lifespan under high-stress conditions.[citation needed]

Beyond defense, EPVD is applied in aerospace for turbine blades and engine components to improve temperature and wear resistance. The automotive industry uses it to enhance engine and transmission parts, while petrochemical, industrial machinery, and medical device sectors benefit from increased durability and biocompatibility in surgical instruments and implants.[citation needed]

References

  1. ^ a b c "European defence industry eyes Canadian technology". The Globe and Mail. 2024-04-21. Retrieved 2024-09-30.
  2. ^ "Toxic artillery: Paradigm Shift Technologies on chrome plating". defence.nridigital.com. Retrieved 30 September 2024.
  3. ^ "Advanced Gun Barrel Technologies (AGBT" (PDF). ndiastorage.blob. Retrieved 30 September 2024.
  4. ^ 20060207871, Yumshtyk, Gennady & Ivanov, Dmitri, "Sputtering devices and methods", issued 2006-09-21 
  5. ^ CA2362146C, Yumshtyk, Gennady & Ioumchtyk, Michael, "Procede et appareil de pulverisation au magnetron", issued 2008-02-12 

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