Terry, do you know how much it has influence to the speed of misalignment of dipole structure, if neodymium magnets are cooled into -192°C using liquid nitrogen? In theory dipole structure should be far more resilient, if magnets are cooled. Neodymium magnets do retain 87% of their magnetic strength at -192°C, so cooling with liquid nitrogen is possible.
―Jouni On Sep 5, 2012, at 3:52 AM, Terry Blanton <[email protected]> wrote: > On Tue, Sep 4, 2012 at 8:43 PM, Jouni Valkonen <[email protected]> > wrote: > >> Terry quite clearly stated that permanent magnets do wear down quite fast, > > Terry said magnets in opposition degrade. Magnets in attraction will > not degrade over time. > > A magnet struck repeatedly by a hammer will degrade due to the > randomization of magnetic domains due to the shock. Magnets in > opposition suffer a similar shock. > > T >
