Strongest magnets

The Faculty of Materials Science and Engineering of Warsaw University of Technology, Wołoska 141, room 019
prof. Waldemar Kaszuwara, Ph.D., D.Sc.

Hard magnetic materials – magnets – are in many everyday objects: in houses, cars, we often have them with us, e.g. in engines of watches. We take no notice of them because they are often hidden in miniature engines, earphones or loudspeakers. Only 20 years ago these devices were not so small. Rapid miniaturization started when strong Nd-Fe-B magnets were obtained (1984). They made use of excellent magnetic properties of the phase Nd2Fe14B. It is not enough, however, to select the contents of these three elements correctly to make an alloy a strong magnet. It also needs to obtain a microstructure which will make the material after magnetizing a source of constant magnetic field. Nowadays the value of the world production of these materials is almost half of the value of production of all magnets. Strong magnets are constantly finding new applications. The participants of the presentation will be able to learn about the secrets of production of Nd-Fe-B magnets, check their strength themselves and see their present and future applications.

Length: 45 min

How to get there – trams 10, 17, 33, buses 107, 117, 138, 192.
Dates:
Saturday, 27 September 2008 11:00
Saturday, 27 September 2008 12:00

More about the Science Festival at the website www.festiwalnauki.edu.pl