Grain Boundary Diffusion (GBD) technology enables the heavy rare earth element Dysprosium to diffuse from the surface of a grain around all of the grains boundaries. Dysprosium is added to Neodymium Iron Boron to improve and maintain the permanent magnet’s strong magnetic fields at high temperatures (above 150 degrees Celsius).
NASA have long utilised magnets for a number of interesting applications from collecting dust on Mars with the Pathfinder program, to space based MRI systems. Indeed, in the past 50 years many satellites have been put in orbit to monitor and track the Earth’s Magnetic Field, looking for changes that could impact life.
It is a little known fact that Magnetic Ferrofluid was invented by NASA as a means of moving fuel around a station or space craft in space where traditional pumping mechanisms (also using permanent magnets as motors or couplings) are not effective. Ferrofluid is now being considered for a huge number of applications from Medical devices to high end speaker drivers and is available via our eMagnets website.
Also a NASA spacecraft will travel closer to the sun than ever before and plot the magnetic field lines that circle the sun. This will provide vital data on solar Winds and the Extreme temperature of the sun’s surface and corona.
“Our development of grain boundary diffusion technology has significantly expanded the number of applications for NbFeB permanent magnets,” explained Matthew Swallow, Bunting’s Technical Product Manager. “We are very proud and excited at being selected to supply such magnet technology to NASA. Our team of experienced magnet engineers are looking forward to working closely with the engineers at NASA.”
Bunting Magnetics produces a wide range of permanent magnets and magnet assemblies for rotating electric machines used in Aerospace, Space, Defence, Automotive and Down Hole applications. For further information or to discuss a specific NdFeB magnet application, please contact us on:
Phone: +44(0)114 276 2264