Title :
The stability of NdFeB magnets
Author :
Clegg, A.G. ; Coulson, I.M. ; Hilton, G.
Author_Institution :
Magnet Centre, Sunderland Polytech., UK
Abstract :
A range of materials was investigated including low and high coercivity magnets, bonded magnequench and cobalt containing alloys. The effect of temperature including irreversible and reversible changes of magnetization are discussed. Magnets with two different working points were investigated. Time effects were determined for magnets held at 100°C for up to 200 hours. It was found that the higher coercivity H cM the better is the temperature stability of the magnet. The highest coercivity materials are produced by using hydrogen decrepitation of the magnet powder
Keywords :
boron alloys; coercive force; ferromagnetic properties of substances; iron alloys; magnetic leakage; magnetisation; magnetisation reversal; neodymium alloys; permanent magnets; 0 to 200 h; 100 C; 50 to 175 C; H decrepitation; NdFeB magnets; NdFeCoB magnets; bonded magnequench; changes of magnetization; effect of temperature; high coercivity magnets; low coercivity magnets; magnet powder; open circuit flux losses; permanent magnets; temperature stability;
Conference_Titel :
New Permanent Magnet Materials and their Applications, IEE Colloquium on
Conference_Location :
London
