| Title |
Characteristics of a Fe-Co Alloy-Dispersed Al2O3 Nanocomposite Powder Synthesized by a Solution Chemistry Route |
| Authors |
(Doh Hyung Riu); (Young Keun Jeong); (Myung Jin Suk); (Sung Tag Oh) |
| DOI |
https://doi.org/10.3365/KJMM.2013.51.2.101 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
nanostructured materials; powder processing; microstructure; X-ray diffraction; magnetic properties |
| Abstract |
An optimum route to synthesize a Fe-Co alloy-dispersed Al2O3 nanocomposite powders and their magnetic properties were investigated. Nanocomposite powders of Al2O3 and Fe-Co alloys were prepared by the solution chemistry method using Al2O3 and metal nitrates powders. Al2O3/Fe-Co alloy powders were sythesized by calcination at 350℃ and hydrogen reduction at 700℃ of Al2O3, Fe- and Ni-nitrate powders. Microstructural analysis for the nanocomposite powders synthesized by ball milling and a hydrogen reduction process showed that the Fe-Co alloy particles with an average size of 20 nm were well distributed on the surface of the Al2O3 powders. The ferromagnetism of the nano-sized Fe-Co alloy contributed to the magnetic properties of the nanocomposite powders. The increase in coercive force was explained as being due to nano-sized particles of the Fe-Co alloy. |