Effect of the Thermal Treatment on the Microstructure and Magnetic Property of Fe68Zr20B12 Alloy Prepared by Mechanical Alloying |
| Y.M. Sun, W.Q. Yu and Z. Hua
College of Physics, Jilin Normal University, Siping, Jilin, 136000, China |
| Received: July 28, 2010; revised version: October 9, 2010; in final form: November 3, 2010 |
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| Fe68Zr20B12 amorphous alloy prepared by mechanical alloying technique of 60 h of duration was annealed at different temperatures (420-720 °C) during 1 h. Microstructure and magnetic property of as-milled and annealed alloy were investigated by X-ray diffraction, transmission electron microscopy, the Mössbauer spectroscopy and vibrating sample magnetometer techniques. Fe68Zr20B12 powders milled during 60 h exhibit amorphous character. After annealing at 420°C, α-Fe phase precipitates from amorphous matrix. Transmission electron microscopy analysis shows the nucleation and growth of α-Fe grains. The Mössbauer results of the annealed alloy at 670°C show that the Fe3B phase precipitates already and there is still remaining amorphous phase. Coercivity increases with increasing annealing temperature, which is closely related to the microstructures after annealing. |
| DOI: 10.12693/APhysPolA.119.374 PACS numbers: 68.37.Lp, 61.05.Qr |