Skip to main content Accessibility help

Glass-forming Ability and Magnetic Properties of Nd70−xFe20Al10Cox Alloys

  • G. J. Fan (a1), W. Löser (a1), S. Roth (a1), J. Eckert (a1) and L. Schultz (a1)...


The influence of Co addition on the glass-forming ability of slowly cooled Nd70-xFe20Al10Cox alloys (0 ≤ x ≤ 10) was studied by x-ray diffraction, constant-rate heating calorimetry, and magnetic measurements. Without addition of Co, the as-cast Nd70Fe20Al10 cylinders of 3-mm diameter show a mixture of amorphous and crystalline phases after copper mold casting. Increasing the Co content promotes amorphization, and bulk amorphous specimens can be obtained for Nd60Fe20Al10Co10. No glass transition or supercooled liquid region before crystallization was observed for the bulk Nd60Fe20Al10Co10 alloy. The bulk amorphous alloy exhibits hard magnetic behavior with a remanence (Jr) of 0.09 T, a magnetization (J1500) of 0.13 T, and a coercivity (Hc) of 298 kAm−1. The Curie temperature for the as-cast Nd70-xFe20Al10Cox cylinders increases from 480 K for x =0 to 487 K for x = 10. The enhanced glass-forming ability for the Nd–Fe–Al-based alloys upon Co addition will be critically discussed with respect to classical nucleation theory and the formation of metastable ordered clusters upon solidification.



Hide All
1.Inoue, A., Mater. Sci. Eng. A 226–228, 357 (1997).
2.Inoue, A., Mater. Trans. JIM 36, 866 (1995).
3.Inoue, A., Nakamura, T., Sugita, T., Zhang, T., and Masumoto, T., Mater. Trans. JIM 34, 351 (1993).
4.Peker, A. and Johnson, W.L., Appl. Phys. Lett. 63, 2342 (1993).
5.Inoue, A., Nishiyama, N., and Masumoto, T., Mater. Trans. JIM 37, 181 (1996).
6.Inoue, A., Zhang, T., and Takeuchi, A., Appl. Phys. Lett. 71, 464 (1997).
7.He, Y., Price, C.E., Poon, S.J., and Shiflet, G.J., Philos. Mag. Lett. 70, 371 (1994).
8.Inoue, A., Takeuchi, A., and Zhang, T., Metall. Mater. Trans. A 29, 1779 (1998).
9.Inoue, A., Zhang, T., Takeuchi, A., and Zhang, W., Mater. Trans. JIM 37, 636 (1996).
10.Inoue, A., Zhang, T., Zhang, W., and Takeuchi, A., Mater. Trans. JIM 37, 99 (1996).
11.Saha, D.K., Koga, K., and Takeo, H., Nanostructured Mater. 8, 1139 (1997).
12.Gebert, A., Eckert, J., and Schultz, L., Acta Mater. 46, 5475 (1998).
13.Chen, L.C. and Spaepen, F., Nature (London) 336, 366 (1988).
14.Greer, A.L., Science 267, 1947 (1995).
15.Fecht, H.J., Mater. Trans. JIM 36, 777 (1995).
16.Inoue, A., Zhang, T., and Masumoto, T., J. Non-Cryst. Solids 156–158, 473 (1993).
17.Christian, J.W., The Theory of Transformation in Metals and Alloys (Pergamon Press, Oxford, United Kingdom, 1975), pp. 418476.
18.Herlach, D.M., Mater. Sci. Eng. R 12, 177 (1994).
19.Turnbill, D., Contemp. Phys. 10, 473 (1969).
20.Johnson, W.L., Mater. Sci. Forum 35, 225 (1996).
21.Fan, G.J., Löser, W., Roth, S., Eckert, J., and Schultz, L., Appl. Phys. Lett. 75, 2984 (1999).
22.Siratori, K., Nagayama, K., Ino, H., Saito, N., and Nakagawa, Y., J. Magn. Magn. Mater. 83, 341 (1990).
23.Ding, J., Li, Y., and Wang, X.Z., J. Phys. D: Appl. Phys. 32, 713 (1999).
24.Alben, R., Becker, J.J., and Chi, M.C., J. Appl. Phys. 49, 1653 (1978).
25.Schrefl, T., Kronmüller, H., and Fidler, J., J. Magn. Magn. Mater. 127, L273 (1993).
26.Gaskell, P.H., Topics Appl. Phys. 53, 5 (1983).


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed