Effects of grain size on coercivity of combined-reaction-processed FePd intermetallics

Journal Article · Mon Jun 07 04:00:00 EDT 2004 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2004.02.036· OSTI ID:20634699

Deshpande, A R; Xu, H; Wiezorek, J M K

The evolution of the microstructure and the coercivity of cold-deformed ferromagnetic Fe-Pd intermetallics with equiatomic composition during isothermal annealing at 500 and 600 deg. C has been studied by X-ray diffraction, scanning and transmission electron microscopy and vibrating sample magnetometry. The deformation-processed alloys exhibit morphologically essentially equiaxed microstructures and up to about fivefold increased coercivity compared with conventionally processed bulk L1{sub 0}-ordered FePd. An inverse linear relationship between the coercivity and the average grain size has been established, which for grain sizes in the range of about 0.4-1.0 {mu}m has been attributed to a nucleation-type coercivity mechanism.

• OSTI ID: 20634699
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 10 Vol. 52; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGE HARDENING
ANNEALING
COERCIVE FORCE
DEFORMATION
GRAIN SIZE
INTERMETALLIC COMPOUNDS
IRON ALLOYS
PALLADIUM ALLOYS
TEMPERATURE RANGE 0400-1000 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION