Preparation and magnetic properties for supersaturated Fe–C solid solution with nanocrystalline structure

Effect of carbon content on structure and magnetic properties for (Fe, Ni)1−xCx by mechanical alloying

“…1(b) shows that Fe 55 Ni 45 and graphite powders tend to agglomerate heavily into micro-sized particles. The morphology of (Fe 55-Ni 45 ) 1Àx C x is similar to that of mechanically alloyed Fe-C powder mixture [11]. The compositional dependence of lattice constant in mechanically alloyed (Fe 55 Ni 45 ) 1Àx C x has been shown in Fig.…”

“…The structural and physical properties of amorphous alloys synthesized by mechanical alloying or rapid quenching techniques have been found to be similar. In our previous work on mechanically alloyed Fe-C [11], the amorphization of FeC ðx ¼ 0:5Þ after 120 h of milling was observed. But, in this work, the full amorphization of Fe 55 Ni 45 -C does not occur for long milling time as expected.…”

“…8. Comparison of magnetic moment per metal atom in Fe-and Nibased binary system: Fe-B and Fe-P [16]; Fe-C [11]; Fe-Si [21]; Ni-B [5]; Ni-P [7]. described by the heat formation DH (the chemical part of formation enthalpy) of alloys.…”

Magnetic properties of cementite powder produced by reaction milling

“…Nikitenko et al [1] synthesized iron nanoparticles by sonochemical method. They showed that sonochemical decomposition of a solution of Fe(CO) 5 in diphenylmethane results in a solid product, which is characterized as iron nanoparticles embedded in a polymeric matrix. Its consequent annealing in argon at temperatures up to 1073 K leads to the growth of iron nanoparticles, covered by an iron carbide protective layer.…”

“…It was found that finely dispersed Fe-C powder with H c and s value in the range of 10-300 Oe and 140-220 A m 2 /kg respectively could be produced by mechanical alloying (MA) followed by thermal treatment. Xu et al [5] studied magnetic properties of supersaturated Fe 1−x C x (0 ≤ x ≤ 0.9) solid solution with nanocrystalline structure prepared by mechanical alloying. The nanocrystalline and large grain phases were formed with 0 ≤ x ≤ 0.67 and 0.75 ≤ x ≤ 0.9 respectively.…”