Title :
The origin of crystallographic texture produced during hot deformation in rapidly-quenched NdFeB permanent magnets
Author :
Li, Lin ; Graham, C.D., Jr.
Author_Institution :
Dept. of Mater. Sci. & Eng., Pennsylvania Univ., Philadelphia, PA, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
The authors present a model for the development of crystallographic texture by hot deformation in NdFeB magnets produced by rapid solidification. Favourably oriented grains, with their c-axis parallel to the compression axis, grow by mass transport through a Nd-rich liquid grain boundary phase, forming large platelet grains. The driving force is the elastic energy difference between grains with c-axes making different angles with the compression axis. Numerical calculations based on the known properties and conditions of these materials are consistent with a liquid diffusion model
Keywords :
boron alloys; diffusion in liquids; ferromagnetic properties of substances; hot working; iron alloys; neodymium alloys; permanent magnets; rapid solidification; texture; Nd-rich liquid grain boundary phase; NdFeB permanent magnets; compression axis; crystallographic texture; elastic energy difference; grain orientation; hot deformation; large platelet grains; liquid diffusion model; mass transport; numerical calculations; rapid solidification; Capacitive sensors; Chemicals; Compressive stress; Crystallography; Grain boundaries; Grain size; Materials science and technology; Permanent magnets; Slabs; Solid modeling;
Journal_Title :
Magnetics, IEEE Transactions on
