Title :
Stability of Nd-Fe-B powders obtained by hydrogen decrepitation
Author :
Verdier, M. ; Morros, J. ; Pere, D. ; Shell, N. ; Harris, I.R.
Author_Institution :
Aubervilliers´´ Res. Centre, Rhone Poulenc, France
fDate :
3/1/1994 12:00:00 AM
Abstract :
Hydrogen decrepitation (HD) of Nd-Fe-B cast alloys is widely used in the processing of sintered magnets. The oxidation resistance under air of alloy powder obtained by HD can be greatly improved by partial degassing. Magnets made after this heat treatment show better properties than those prepared by the standard HD route. Optimum magnetic properties due to limited oxygen uptake are obtained in magnets made from powder exposed to air for a certain time
Keywords :
boron alloys; coercive force; heat treatment; iron alloys; neodymium alloys; oxidation; permanent magnets; powder metallurgy; sintering; H decrepitation; Nd-Fe-B; Nd-Fe-B powders; heat treatment; oxidation resistance; partial degassing; sintered magnets; High definition video; Hydrogen; Magnetic materials; Magnets; Milling; Neodymium; Oxidation; Powders; Stability; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
