Microstructural Evolution and Nanocrystalline Formation Kinetics in FeCo Based Alloys During Mechanical Alloying

Abstract:

Mechanical alloying (MA) is a widely used processing technique to prepare metastable or nanophase materials in a cost effective fashion. In this study, mechanically alloying FeCo based nanomagnetic alloys was included. Scanning electron microscope (SEM), X-ray diffractometer (XRD), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) were used to characterize the as milled powders. The effect of additional elements P and B on the powder size, microstructures and magnetic properties is discussed. It showed that the addition of P and B could reduce the powder size more effectively. The addition of elements P and B during MA of FeCo magnetic alloy also led to the formation of spherical nanocrystallines instead of banded microstructures in MA FeCo without these additions.

• Periodical: Journal of Metastable and Nanocrystalline Materials (Volume 23)
• Pages: 187-190
• DOI: https://doi.org/10.4028/www.scientific.net/JMNM.23.187
• Online since: January 2005
• Authors: H.F. Li, R.V. Ramanujan
• Keywords: Iron-Cobalt, Magnetic, Mechanical Alloying (MA), Microstructure, Nanocrystalline

References

[1] J.M.D. Coey: J. Magn. Magn. Mater. Vol. 226-230 (2001), p.2107.

[2] M.E. Mchenry and D.E. Laughlin: Acta Mater. Vol. 48 (2000), p.223.

[3] G. Salazar-Alvarez, M. Mikhailova, M. Toprak, Y. Zhang and M. Muhammed: Mat. Res. Soc. Symp. Proc. Vol. 704 (2002), p. W. 7. 1. 1.

[4] M.A. Willard, D.E. Laughlin and M.E. McHenry: J. Appl. Phys. Vol. 87 (2000), p.7091.

[5] D.H. Ping, Y.Q. Wu, M.A. Willard, M.E. McHenry and D.E. Laughlin: Scripta Mater. Vol. 45 (2001), p.781.

[6] M.A. Willard, M. Gingras, M.J. Lee, V.G. harris, D.E. Laughlin and M.E. McHenry: Mat. Res. Soc. Symp. Proc. Vol. 577 (1999), p.469.

[7] C. Suryanarayana: Prog. Mater. Sci. Vol. 46 (2001), p.1.

[8] G. Gonzalwz, A. Sagarzazu, R. Villalba, J. Ochoa and L. D'Onofrio: Mater. Sci. Forum Vol. 360-362 (2001), p.355.

[9] Y.D. Kim, J. Y. Chung, J. Kim, H. Jeon: Mater. Sci. Eng. A Vol. 291 (2000), p.17.

[10] B.H. Lee, B.S. Ahn, D.G. Kim, S.T. Oh, H. Jeon, J. Ahn and Y.D. Kim: Mater. Lett. Vol. 57 (2003), p.1103.

[11] R. Elkalkouli, M. Grosbras and J.F. Dinhut: Nanostructured Mater. Vol. 5 (1995), p.733.

[12] R. Bruning, K. Samwer, C. Kuhrt and L. Schultz: J. Appl. Phys. Vol. 72 (1992), p.2978.

[13] C. Kuhrt and L. Schultz: J. Appl. Phys. Vol. 73 (1993), p.6588.

[14] C. Kuhrt and L. Schultz: J. Appl. Phys. Vol. 71 (1992), p.1896.

[15] I. Baker, R.G. Quiller, M. Robson and D. Wu: MRS Fall Meeting (2002).