Formation, properties, thermal characteristics, and crystallization of hard magnetic Pr–Al–Fe–Cu bulk metallic glasses

The Pr(55-x)A(12+x)Fe(33-y)Cu(y) (0 less than or equal to xless than or equal to 5, 0less than or equal to yless than or equal to 8) bulk metallic glasses (BMGs) 5 mm in diameter and 100 turn in length were prepared by copper mold suction casting. Hysteresis loops of the Pr55-xAl12+xFe33-yCuy BMGs and the corresponding Pr55Al12Fe30Cu3 crystallized alloy were measured, and the results showed that the Pr55-xAl12+xFe33-yCuy BMGs are hard magnetic, while the completely crystallized wPr(55)Al(12)Fe(30)Cu(3) alloy is paramagnetic at room temperature. The thermal behavior and crystallization of the Pr55Al12Fe30Cu3 BMG were studied by differential scanning calorimetry, and the results indicated that the Pr-based BMG has obvious glass transition and a wide supercooled liquid region up to 75 K. The crystallization activation energy for the Pr55Al12Fe30Cu3 BMG is much smaller than that of Zr-Ti-Cu-Ni-Be BMG.

[1]  W. L. Wang,et al.  A highly glass-forming alloy with low glass transition temperature , 2003 .

[2]  Weihua Wang,et al.  Synthesis of Fe-based bulk metallic glasses with low purity materials by multi-metalloids addition , 2003 .

[3]  Weihua Wang,et al.  Excellent Wave Absorption by Zirconium‐Based Bulk Metallic Glass Composites Containing Carbon Nanotubes , 2003 .

[4]  H. Kong,et al.  Glass-forming ability of Pr–(Cu,Ni)–Al alloys in eutectic system , 2003 .

[5]  Weihua Wang,et al.  Role of addition in formation and properties of Zr-based bulk metallic glasses , 2002 .

[6]  Weihua Wang,et al.  Anomalous thermal stability of Nd–Fe–Co–Al bulk metallic glass , 2002 .

[7]  N. Phuc,et al.  Large unidirectional anisotropy in Nd60Fe30Al10 bulk amorphous alloys , 2002 .

[8]  M. Seibt,et al.  Microstructure-controlled magnetic properties of the bulk glass-forming alloy Nd60Fe30Al10 , 2002 .

[9]  J. Ding,et al.  Model of ferromagnetic clusters in amorphous rare earth and transition metal alloys , 2001 .

[10]  H. Chiriac,et al.  On the magnetic and structural behaviour of the Nd50Fe40(Si1-xAlx)10 bulk amorphous alloys , 2001 .

[11]  Weihua Wang,et al.  Nd65Al10Fe25-xCox (x=0,5,10) bulk metallic glasses with wide supercooled liquid regions , 2001 .

[12]  J. Eckert,et al.  Atomic ordering and magnetic properties in Nd57Fe20B8Co5Al10 solids , 2000 .

[13]  J. Eckert,et al.  Glass-forming Ability and Magnetic Properties of Nd70−xFe20Al10Cox Alloys , 2000 .

[14]  H. Schober,et al.  Time-Temperature Superposition of Structural Relaxation in a Viscous Metallic Liquid , 1999 .

[15]  J. Eckert,et al.  Magnetic properties of cast Nd60−xFe20Al10Co10Cux alloys , 1999 .

[16]  Weihua Wang,et al.  Crystallization kinetics and glass transition of Zr41Ti14Cu12.5Ni10−xFexBe22.5 bulk metallic glasses , 1999 .

[17]  W. Johnson.  Bulk Glass-Forming Metallic Alloys: Science and Technology , 1999 .

[18]  T. Shen,et al.  Bulk ferromagnetic glasses prepared by flux melting and water quenching , 1999 .

[19]  A. Takeuchi,et al.  Ferromagnetic bulk amorphous alloys , 1998 .

[20]  Weihua Wang,et al.  Enhanced thermal stability and microhardness in Zr-Ti-Cu-Ni-Be bulk amorphous alloy by carbon addition , 1997 .

[21]  A. Takeuchi,et al.  Preparation of Bulk Pr–Fe–Al Amorphous Alloys and Characterization of Their Hard Magnetic Properties , 1996 .

[22]  Wei Zhang,et al.  Hard Magnetic Bulk Amorphous Nd–Fe–Al Alloys of 12 mm in Diameter Made by Suction Casting , 1996 .

[23]  S. Poon,et al.  Formation of bulk metallic glasses in neodymium-based alloys , 1994 .

[24]  Tao Zhang,et al.  Glass-forming ability of alloys , 1993 .

[25]  Lawrence H. Bennett,et al.  Binary alloy phase diagrams , 1986 .

[26]  J. Strom-Olsen,et al.  Crystallization characteristics of Cu‐Zr metallic glasses from Cu70Zr30 to Cu25Zr75 , 1982 .