Title :
Neutron diffraction structural studies of Nd2Fe17-x MxCy
Author :
Luo, H. ; Hu, Z. ; Yelon, W.B. ; Ezekwenna, P.C. ; Marasinghe, G.K. ; James, W.J.
Author_Institution :
Res. Reactor, Missouri Univ., Columbia, MO, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
Four samples of Nd2Fe17-xMxCy (where M=Al,Ga,Ti,V) were synthesized using rf induction melting and C was introduced from the melt. Structural studies were the carried out using neutron diffraction. All samples were confirmed to have the Th2 Zn17-type rhombohedral structure with expanded unit cell volumes. However, the volume effect, as well as the site preference of the substitutional atoms (M) is different among these samples and is different compared to their uncarbided counterparts. The C atoms were found to reside in the 9e site for all samples. The observed Curie temperature is higher for samples with higher C concentrations
Keywords :
Curie temperature; aluminium alloys; crystal growth from melt; crystal structure; ferromagnetic materials; gallium alloys; iron alloys; neodymium alloys; neutron diffraction; permanent magnets; titanium alloys; vanadium alloys; Curie temperature; Nd2(FeAl)17C; Nd2(FeGa)17C; Nd2(FeTi)17C; Nd2(FeV)17C; Nd2Fe17-xAlxCy; Nd2Fe17-xGaxCy; Nd2Fe17-xTixCy; Nd2Fe17-xVxCy; Th2Zn17-type rhombohedral structure; neutron diffraction; structure; volume effect; Annealing; Argon; Atmosphere; Diffraction; Furnaces; Iron; Neodymium; Neutrons; Powders; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
