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Magnets and Magnet Assemblies for Defence Applications

Magnets and Magnet Assemblies for Defence Applications
08/03/2021

Globally, permanent rare earth magnets play a major role in defence technology. They feature in a diverse range of applications including missile guidance systems, disk-drive motors in aircraft and tanks, satellite communications, and radar and sonar systems. Indeed, rare earth magnets are a critical component of a vast number of cutting-edge defence applications and a driving force behind the development of new defence technology.

Military Preference for Samarium Cobalt Although Neodymium Iron Boron (NdFeB) is the most widely used permanent rare earth magnet, the challenging working conditions found in many defence applications drives designers to use Samarium Cobalt (SmCo). Samarium cobalt magnets have a high coercivity (i.e. less resistant to demagnetisation at high temperatures) and, even when uncoated, are corrosion resistant.

Such characteristics make samarium cobalt magnets ideal for military technologies such as precision-guided missiles, smart bombs, and aircraft. Specific applications include:

Technical Product Information: Samarium Cobalt Magnets Fighter Jet Electronic Warfare Systems The ability of samarium cobalt magnets to reliably perform in temperatures ranging from -55°C to 125°C suits specific applications such as the electronic warfare systems in fighter jets. These must be able to reliably operate in extreme conditions, such as altitudes of 70,000 feet with the associated temperature and pressure differential.

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