High Energy Density Rare-Earth Permanent Magnet Alloy

For the first time, Vacuumschmelze GmbH & Co. KG (VAC) will attend the Space Tech Expo & Conference Europe, held in Bremen from 17-19 November, with its own company stand. "Europe's largest trade show specializing in supply chains and technology for spacecraft, their subsystems and components" provides a platform for leading technology experts, company CEOs and global decision-makers in the aerospace industry to meet and discuss issues and trends. At VAC's stand, no. E09, the company will present products including its new rare-earth permanent magnet alloy, VACOMAX® 262. This new product features higher remanence and higher energy density than its predecessor, VACOMAX® 225.

Magnets made from VACOMAX are used in advanced applications including as drive or sensor magnets for high-speed motors and generators. In addition to good corrosion resistance, an outstanding feature of the alloy is its high thermal stability up to about 350 degrees C, an area in which VACOMAX 262 significantly outperforms the temperature limits of all neodymium-iron-boron (NdFeB) alloys. The latest member of the VACOMAX family also delivers high remanence, typically at a level of 1.19 Tesla.

VACOMAX magnets also have excellent energy densities. Up to ten times higher than those of AlNiCo and ferrite magnets. Energy density of the new VACOMAX 262 alloy is typically 33 MGOe (262 kJ/m³). This enables magnet mass to be reduced and systems, or even entire assemblies, to be miniaturized, generating cost and weight savings in many applications where these factors are a critical issue.