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Bulk metallic glass formation, composite, and magnetic propertiesof Fe-B-Nd based alloys

Published online by Cambridge University Press:  31 January 2011

J. Zhang ,
Y.P. Feng  and
Y. Li
Y.P. Feng
Affiliation:
Department of Physics, National University of Singapore, 117542, Singapore
Y. Li*
Affiliation:
Department of Materials Science & Engineering, National University of Singapore, 119260, Singapore
*
a) Address all correspondence to this author.e-mail: mseliy@nus.edu.sg
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Abstract

The glass formation in Fe-rich ternary Fe-B-Nd and quaternary (Fe,B,Nd)96Nb4 alloys has been studied and the best ternary and quaternary glass formers are located at Fe67B23Nd10 and (Fe68B25Nd7)Nb4 with critical diameters of 1 and 4 mm, respectively. For (Fe,B,Nd)96Nb4 alloys, the competing phases with glass were identified by monitoring the microstructure change. Fe14Nd2B was discovered to be one competing phase, which is the principle magnetic phase for Nd-Fe-B hard magnets. Composites with uniformly distributed Fe14Nd2B were formed for quaternary alloys with a diameter of 1.5 to 3 mm. Bulk hard magnets could be obtained by directly annealing the composites in a compositional area. A hard magnet with a coercivity of 1,100 kAm−1 and a maximum energy product, (BH)max, of 33 kJm–3 was obtained at (Fe67B23Nd10)96Nb4 by annealing. The combination of hard magnetic properties and the large critical sample size may make these alloys a commercially viable candidate for industrial applications.

Keywords

AmorphousCompositeMagnetic properties
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 2 , February 2009 , pp. 357 - 371
Copyright
Copyright © Materials Research Society 2009

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References

REFERENCES

1.Croat, J.J., Herbst, J.F., Lee, R.W., Pinkerton, F.E.: Pr-Fe and Nd-Fe-based materials—A new class of high-performance permanent-magnets. J. Appl. Phys. 55, 2078 (1984)CrossRefGoogle Scholar
2.Sagawa, M., Fujimura, S., Togawa, N., Yamamoto, H., Matsuura, Y.: New material for permanent-magnets on a base of Nd and Fe. J. Appl. Phys. 55, 2083 (1984)CrossRefGoogle Scholar
3.Betancourt, I., Davies, H.A.: Enhanced coercivity in B-rich nanocomposite α-Fe/(NdPr)2Fe14B/Fe3B hard magnetic alloys. Appl. Phys. Lett. 87, 162516 (2005)Google Scholar
4.Betancourt, J.I., Davies, H.A.: Coercivity mechanism in nanophase (Nd-Pr)-Fe-B melt spun alloys. Physica B 320, 294 (2002)CrossRefGoogle Scholar
5.Coey, J.M.D.: Rare-earth Iron Permanent Magnets(Clarendon Press, Oxford UK 1996)231CrossRefGoogle Scholar
6.Ponnambalam, V., Poon, S.J., Shiflet, G.J.: Fe–Mn–Cr–Mo–(Y,Ln)–C–B (Ln = Lanthanides) bulk metallic glasses as formable amorphous steel alloys. J. Mater. Res. 19, 3046 (2004)Google Scholar
7.Lu, Z.P., Liu, C.T., Thompson, J.R., Porter, W.D.: Structural amorphous steels. Phys. Rev. Lett. 92, 245503 (2004)Google Scholar
8.Shen, J., Chen, Q.J., Sun, J.F., Fan, H.B., Wang, G.: Exceptionally high glass-forming ability of an FeCoCrMoCBY alloy. Appl. Phys. Lett. 86, 151907 (2005)Google Scholar
9.Cheng, Z.H., Shen, B.G., Mao, M.X., Sun, J.J., Zhang, Y.D., Li, F.S.: Magnetism, phase-composition, and hyperfine fields of melt-spun Nd-Fe-B alloys with a few percent of neodymium. Phys. Rev. B: Condens. Matter 52, 9427 (1995)Google Scholar
10.Kawazoe, Y., Masumoto, T., Suzuki, K., Inoue, A., Tsai, A-P., Yu, J-Z., Aihara, T. Jr., Nakanomyo, T.: Phase Diagrams and Physical Properties of Nonequilibrium Alloys Vol. 37(Springer-Verlag Berlin 1997)134Google Scholar
11.Zhang, W., Inoue, A.: Bulk nanocomposite permanent magnets produced by crystallization of (Fe,Co)-(Nd,Dy)-B bulk glassy alloy. Appl. Phys. Lett. 80, 1610 (2002)Google Scholar
12.Inoue, A.: Stabilization of metallic supercooled liquid and bulk amorphous alloys. Acta Mater. 48, 279 (2000)CrossRefGoogle Scholar
13.Amiya, K., Urata, A., Nishiyama, N., Inoue, A.: Fe-B-Si-Nb bulk metallic glasses with high strength above 4000 MPa and distinct plastic elongation. Mater. Trans., JIM 45, 1214 (2004)Google Scholar
14.Song, D.S., Kim, J.H., Fleury, E., Kim, W.T., Kim, D.H.: Synthesis of ferromagnetic Fe-based bulk glassy alloys in the Fe-Nb-B-Y system. J. Alloys Compd. 389, 159 (2005)Google Scholar
15.Greer, A.L.: Materials science—Confusion by design. Nature 366, 303 (1993)Google Scholar
16.Lin, C.Y., Tien, H.Y., Chin, T.S.: Soft magnetic ternary iron-boron-based bulk metallic glasses. Appl. Phys. Lett. 86, 162501 (2005)Google Scholar
17.Zhang, J., Tan, H., Feng, Y.P., Li, Y.: The effect of Y on glass forming ability. Scr. Mater. 53, 183 (2005)Google Scholar
18.Ma, D., Tan, H., Wang, D., Li, Y., Ma, E.: Strategy for pinpointing the best glass-forming alloys. Appl. Phys. Lett. 86, 191906 (2005)Google Scholar
19.Long, Y., Zhang, W., Wang, X.M., Inoue, A.: Effects of transition metal substitution on the glass-formation ability and magnetic properties of Fe62Co9.5Nd3Dy0.5B25 glassy alloy. J. Appl. Phys. 91, 5227 (2002)CrossRefGoogle Scholar
20.Zhang, W., Long, Y., Imafuku, M., Inoue, A.: Thermal stability and soft magnetic properties of (Fe, Co)-(Nd, Dy)-B glassy alloys with high boron concentrations. Mater. Trans., JIM 43, 1974 (2002)Google Scholar
21.Tan, H., Zhang, Y., Ma, D., Feng, Y.P., Li, Y.: Optimum glass formation at off-eutectic composition and its relation to skewed eutectic coupled zone in the La based La-Al-(Cu,Ni) pseudo ternary system. Acta Mater. 51, 4551 (2003)Google Scholar
22.Wang, D., Tan, H., Li, Y.: Multiple maxima of GFA in three adjacent eutectics in Zr-Cu-Al alloy system—A metallographic way to pinpoint the best glass forming alloys. Acta Mater. 53, 2969 (2005)CrossRefGoogle Scholar
23.Kim, D.H., Park, J.M., Kim, D.H., Kim, W.T.: Development of quaternary Fe-B-Y-Nb bulk glassy alloys with high glass-forming ability. J. Mater. Res. 22, 471 (2007)Google Scholar
24.Inoue, A., Shen, B.: Soft magnetic bulk glassy Fe-B-Si-Nb alloys with high saturation magnetization above 1.5 T. Mater. Trans., JIM 43, 766 (2002)Google Scholar
25.Han, Z., Zhang, J., Li, Y.: Quaternary Fe-based bulk metallic glasses with a diameter of 5 mm. Intermetallics 15, 1447 (2007)CrossRefGoogle Scholar
26.Boettinger, W.J.: Proceedings of the 4th International Conference on Rapidly Quenched MetalsJapan Institute of Metals198199Google Scholar
27.Zhang, J., Lim, K.Y., Feng, Y.P., Li, Y.: Fe-Nd-B-based hard magnets from bulk amorphous precursor. Scr. Mater. 56, 943 (2007)Google Scholar