Title :
Hydrogen decrepitation of sintered NdFeB magnets
Author :
Stiller, C. ; Roth, S. ; Binner, A.
Author_Institution :
Inst. fur Festkorper und Werkstofforschung e.V., Dresden, Germany
fDate :
3/1/1994 12:00:00 AM
Abstract :
The kinetics of the hydrogen absorption and desorption behaviour of a NdFeB sintered magnet is studied. Hydrogenation at temperatures above 200°C is used to crumble the Nd-enriched phase. The grains of Nd2Fe14B phase remain undamaged. Hydrogen desorption occurs in several stages and is complete at approximately 400°C
Keywords :
boron alloys; desorption; ferromagnetic properties of substances; hydrogen; iron alloys; neodymium alloys; powder metallurgy; sintering; sorption; 200 to 400 C; H2; Nd2Fe14B; crumbling; hard magnetic grains; hydrogen absorption; hydrogen decrepitation; hydrogen desorption; hydrogenation; kinetics; sintered NdFeB magnets; Absorption; Coercive force; Grain boundaries; Hydrogen; Magnetic separation; Magnets; Nickel; Nitrogen; Powders; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
