ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Finely divided loose Nd2Fe14BHx, x≤5, hydride powder (particle size ≤1 μm is synthesized by washing Nd2Fe14B crystallites embedded in calcium and other by-products (during a reduction-diffusion-reaction performed using excess calcium) in water. The calcium reacts thereby with the water and produces, Ca+H2O(large-closed-square)CaO+H2, native hydrogen, which very intimately reacts the alloy and forms the hydrided alloy. The particles are passivated forming a thin but rather hydrogen proof (and probably amorphous) layer of oxide and hydroxide species on the surface. Consequently, peculiarly, they are stable, stand against high corrosion, and can be stored in laboratory air atmosphere at room temperature for extended periods of time with no apparent further loss in structural or magnetic properties.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.107853
