TY - JOUR
T1 - Laser assisted crystallization of ferromagnetic amorphous ribbons
T2 - A multimodal characterization and thermal model study
AU - Katakam, Shravana
AU - Devaraj, Arun
AU - Bowden, Mark
AU - Santhanakrishnan, S.
AU - Smith, Casey
AU - Ramanujan, R. V.
AU - Suntharampillai, Thevuthasan
AU - Banerjee, Rajarshi
AU - Dahotre, Narendra B.
PY - 2013/11/14
Y1 - 2013/11/14
N2 - This paper focuses on laser-based de-vitrification of amorphous soft magnetic Fe-Si-B ribbons and its consequent influence on the magnetic properties. Laser processing resulted in a finer scale of crystallites due to rapid heating and cooling during laser annealing compared to conventional furnace annealing process. A significant increase in saturation magnetization is observed for laser-annealed ribbons compared to both as-received and furnace annealed samples coupled with an increase in coercivity compared to the as received samples. The combined effect of thermal histories and stresses developed during laser annealing results in the formation of nano-crystalline phase along the laser track. The phase evolution is studied by micro-XRD and TEM analysis. Solute partitioning and compositional variation within the phases are obtained by Local Electrode Atom probe analysis. The evolution of microstructure is rationalized using a Finite Element based heat transfer multi-physics model.
AB - This paper focuses on laser-based de-vitrification of amorphous soft magnetic Fe-Si-B ribbons and its consequent influence on the magnetic properties. Laser processing resulted in a finer scale of crystallites due to rapid heating and cooling during laser annealing compared to conventional furnace annealing process. A significant increase in saturation magnetization is observed for laser-annealed ribbons compared to both as-received and furnace annealed samples coupled with an increase in coercivity compared to the as received samples. The combined effect of thermal histories and stresses developed during laser annealing results in the formation of nano-crystalline phase along the laser track. The phase evolution is studied by micro-XRD and TEM analysis. Solute partitioning and compositional variation within the phases are obtained by Local Electrode Atom probe analysis. The evolution of microstructure is rationalized using a Finite Element based heat transfer multi-physics model.
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U2 - 10.1063/1.4829279
DO - 10.1063/1.4829279
M3 - Article
AN - SCOPUS:84887979086
SN - 0021-8979
VL - 114
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 18
M1 - 184901
ER -