Glass formation, nanocrystallisation and magnetic properties of the (Fe1–xCox)79Nb3B18 (x = 0, 0.15, 0.3, 0.45, 0.6, 0.75) metallic glasses

Abstract The glass-forming ability (GFA), nanocrystallisation, electrical resistivity and soft magnetic properties of (Fe1-xCox)79Nb3B18 (x = 0, 0.15, 0.3, 0.45, 0.6, 0.75) glassy alloys were investigated. We found that the substitution of Fe by Co is beneficial for improving the GFA. As-spun (Fe0.55Co0.45)79Nb3B18 glassy alloys show the best GFA, along with excellent soft magnetic properties in the supercooled liquid region, with a saturation magnetisation and coercivity of 140 A · m2 · kg-1 and 19.9 A · m-1, respectively, at 60 K. With increasing Co content, the electrical resistivity initially decreases rapidly, and then fluctuates around approximately 70 ± 4 μΩ cm. With increasing the annealing temperature, the saturation magnetisation improves initially, but then decreases for the (Fe0.4Co0.6)79Nb3B18 alloy, and the coercivity does not significantly improve. These newly developed FeCoNbB multicomponent alloys exhibit appreciable GFA, good magnetic properties and low material cost, and they can serve as a promising soft magnetic material for use in industrial applications.

[1]  D. V. Louzguine-Luzgin,et al.  Bulk Metallic Glasses , 2010, Encyclopedia of Glass Science, Technology, History, and Culture.

[2]  Z. Jian,et al.  The influence of Ni or Co substitution for Fe on glass forming ability and magnetic properties in the quaternary Fe–Nb–B–Ni and (Fe, Ni, Co)–Nb–B alloy systems , 2015 .

[3]  J. Eckert,et al.  Electrical and magnetic properties of Fe-based bulk metallic glass with minor Co and Ni addition , 2014 .

[4]  Run‐Wei Li,et al.  High strength CoFe-based glassy alloy with high thermal stability , 2014 .

[5]  G. Herzer.  Modern Soft Magnets: Amorphous and Nanocrystalline Materials , 2013 .

[6]  Yuan Wu,et al.  Effects of nanocrystal formation on the soft magnetic properties of Fe-based bulk metallic glasses , 2011 .

[7]  J. Eckert,et al.  Thermal stability and magnetic properties of partially Co-substituted (Fe71.2B24Y4.8)96Nb4 bulk metallic glasses , 2011 .

[8]  P. Nordblad,et al.  Detailed study of ultra-soft magnetic properties of Fe74Cu0.8Nb2.7Si15.5B7 , 2011 .

[9]  J. Rodríguez-Viejo,et al.  Effect of minor additions on the glass forming ability and magnetic properties of Fe–Nb–B based metallic glasses , 2010 .

[10]  J. Eckert,et al.  Enhancement of plastic deformability in Fe-Ni-Nb-B bulk glassy alloys by controlling the Ni-to-Fe concentration ratio , 2010 .

[11]  M. Ge,et al.  Catching Fe-based bulk metallic glass with combination of high glass forming ability, ultrahigh strength and good plasticity in Fe–Co–Nb–B system , 2009 .

[12]  Zhichun Zhang,et al.  Y effects on magnetic and mechanical properties of Fe-based Fe–Nb–Hf–Y–B bulk glassy alloys with high glass-forming ability , 2009 .

[13]  I. Betancourt,et al.  Magnetic properties of B-rich (Fe, Co)–Nb–B amorphous alloys , 2009 .

[14]  Y. Li,et al.  Ductile Fe-Nb-B bulk metallic glass with ultrahigh strength , 2008 .

[15]  P. Liaw,et al.  Solid‐Solution Phase Formation Rules for Multi‐component Alloys , 2008 .

[16]  S. Deevi,et al.  Soft Magnetic FeCo Alloys. Alloy Development, Processing, and Properties , 2006 .

[17]  M. Stoica,et al.  New ternary Fe-based bulk metallic glass with high boron content , 2006 .

[18]  Weihua Wang,et al.  The effect of crystallization on microstructure and magnetic properties of Fe61Co7Zr9.5Mo5W2B15.5 bulk metallic glass , 2006 .

[19]  G. Wang,et al.  Exceptionally high glass-forming ability of an FeCoCrMoCBY alloy , 2005 .

[20]  A. Makino,et al.  Magnetic properties and core losses of nanocrystalline FeMB (M Zr, Hf or Nb) alloys , 1994 .

[21]  A. L. Greer,et al.  Confusion by design , 1993, Nature.

[22]  Akihiro Makino,et al.  Low core losses of nanocrystalline Fe-M-B (M=Zr, Hf, or Nb) alloys , 1993 .

[23]  G. Herzer,et al.  Grain structure and magnetism of nanocrystalline ferromagnets , 1989, International Magnetics Conference.

[24]  P. Duwez,et al.  Amorphous Ferromagnetic Phase in Iron‐Carbon‐Phosphorus Alloys , 1967 .

[25]  John Ziman,et al.  A theory of the electrical properties of liquid metals , 1965 .