The effect of Ti, Nb, and Ta additions to ZrAlCu metallic glass on the crystallization and formation of the icosahedral phase

2007 ◽  
Vol 22 (4) ◽  
pp. 1093-1097 ◽  
Author(s):  
J.B. Qiang ◽  
W. Zhang ◽  
G.Q. Xie ◽  
A. Inoue
Keyword(s):  
Transition Metals ◽  
Metallic Glass ◽  
Phase Formation ◽  
Crystallization Behavior ◽  
Alloy System ◽  
Primary Crystallization ◽  
Icosahedral Phase ◽  
Necessary Condition ◽  
Present Alloy ◽  
Heats Of Mixing

The addition of Ti, Nb, or Ta altered the crystallization behavior of the Zr65Al7.5Cu27.5 glass, and a metastable nanoscaled I-phase was obtained on primary crystallization of these quaternary glasses. The complete substitution of Al by Nb also led to the precipitation of I-phase upon crystallization. Negative heats of mixing between the addition metals and the transition metals of the mother alloy were demonstrated to be not a necessary condition for I-phase formation in the present alloy system.

scholarly journals Crystallization Behavior and Phase Formation in Zr–Al–Cu–Ni Metallic Glass Containing Oxygen

1998 ◽  
Vol 39 (6) ◽  
pp. 623-632 ◽  
Author(s):  
J. Eckert ◽  
N. Mattern ◽  
M. Zinkevitch ◽  
M. Seidel
Keyword(s):  
Metallic Glass ◽  
Phase Formation ◽  
Crystallization Behavior

scholarly journals Crystallization behavior of Zr62Al8Ni13Cu17 Metallic Glass

2017 ◽  
Vol 62 (2) ◽  
pp. 1023-1026 ◽  
Author(s):  
Mi Sun Jo ◽  
Jin Kyu Lee
Keyword(s):  
Metallic Glass ◽  
Crystalline Phase ◽  
Crystallization Behavior ◽  
Amorphous Matrix ◽  
Primary Crystallization ◽  
Isothermal Transformation ◽  
Avrami Analysis ◽  
Diffusion Controlled ◽  
Residual Amorphous Matrix ◽  
Glass Alloy

AbstractThe crystallization behavior has been studied in Zr62Al8Ni13Cu17metallic glass alloy. The Zr62Al8Ni13Cu17metallic glass crystallized through two steps. The fcc Zr2Ni phase transformed from the amorphous matrix during first crystallization and then the Zr2Ni and residual amorphous matrix transformed into a mixture of tetragonal Zr2Cu and hexagonal Zr6Al2Ni phases. Johnson-Mehl-Avrami analysis of isothermal transformation data suggested that the formation of crystalline phase is primary crystallization by diffusion-controlled growth.

TEM INVESTIGATION ON CRYSTALLIZATION BEHAVIOR OF A Fe68C10.5Si4.4B6.5P8.6Al2 BULK METALLIC GLASS

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1223-1228
Author(s):  
KI BUEM KIM ◽  
HONG XIANG LI ◽  
SEONGHOON YI
Keyword(s):  
Heat Treatment ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Crystallization Behavior ◽  
Amorphous Matrix ◽  
Treatment Time ◽  
Annealing Treatment ◽  
Primary Crystallization ◽  
Heat Treatment Time ◽  
Nano Scale

TEM investigations on crystallization behavior of a Fe 68 C 10.5 Si 4.4 B 6.5 P 8.6 Al 2 bulk metallic glass reveals that the nano-scale fcc Fe phase formed by primary crystallization is homogeneously embedded in the amorphous matrix after heat treatment at 783 K for 30 min. With increasing heat treatment time (783 K for 45 min), a tetragonal Fe 3( C , B , P ) phase encapsulates the primary fcc Fe phase suppressing the growth of the fcc Fe phase. The Fe 3( C , B , P ) phase decomposes into a mixture of orthorhombic Fe 3( C , P ) and tetragonal Fe 3( B , P ) upon further annealing treatment at 783K.

Crystallization Behavior of an Au Based Metallic Glass at High Temperature

2019 ◽  
Author(s):  
F.X. Bai ◽  
S.J. Zheng ◽  
Y.X. Wang ◽  
J. Pan ◽  
J.H. Yao ◽  
...  
Keyword(s):  
High Temperature ◽  
Metallic Glass ◽  
Crystallization Behavior

The Effect of Co Addition on Glassy Forming Ability and Soft Magnetic Properties of Fe-Si-B-P Bulk Metallic Glass

2012 ◽  
Vol 508 ◽  
pp. 112-116 ◽  
Author(s):  
Xue Li ◽  
Yan Zhang ◽  
Hidemi Kato ◽  
Akihiro Makino ◽  
Akihisa Inoue
Keyword(s):  
Magnetic Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glassy Alloy ◽  
High Strength ◽  
Alloy System ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Co Addition ◽  
Ferromagnetic Bulk

We Successfully Prepared the Rod Glassy Samples of (Fe1-xCox)76Si9B10P5 (x = 0~0.4) Bulk Metallic Glass (BMG) with the Diameters up to 3.0 mm by Substituting Fe for a Small Amount of Co Element. A Certain Amount of Co Substitution for Fe Contributes to the Increase of the Glass-Forming Ability (GFA) while Maintaining Good Mechanical Properties (the Fracture Strength up to 3700 MPa). This Co-Added Ferromagnetic Bulk Glassy Alloy System Also Exhibits a Higher Saturation Magnetization of 1.49 T and Lower Coercive Force (Hc, 1.2 A/m). The Fe-Based BMGs with Alloying a Small Amount of Co Element Demonstrate Excellent Combination of High GFA, Good Soft-Magnetic Properties as Well as High Strength.

Influence of sub-Tg annealing on microstructure and crystallization behavior of TiZr-based bulk metallic glass

2021 ◽  
Vol 565 ◽  
pp. 120855
Author(s):  
J.W. Lv ◽  
D.W. Yin ◽  
F.L. Wang ◽  
Y.J. Yang ◽  
M.Z. Ma ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Crystallization Behavior

scholarly journals Phase Formation during Solidification of Mg-Nd-Zn Alloys: An In Situ Synchrotron Radiation Diffraction Study

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1637 ◽  
Author(s):  
Domonkos Tolnai ◽  
Tungky Subroto ◽  
Serge Gavras ◽  
Ricardo Buzolin ◽  
Andreas Stark ◽  
...  
Keyword(s):  
Rare Earth ◽  
Synchrotron Radiation ◽  
Diffraction Study ◽  
Phase Formation ◽  
Theoretical Calculations ◽  
Alloy System ◽  
Zn Addition ◽  
Synchrotron Radiation Diffraction ◽  
Zn Alloys

Mg-4Nd base alloys with Zn additions of 3, 5 and 8 wt % were investigated with in situ synchrotron radiation diffraction during solidification. This method enabled the investigation of phase formation and transformation in the alloys. The diffraction results were supported with TEM observations on the as-solidified samples. The results show the effect of increased Zn addition on stabilizing the Mg3RE phase (RE—rare earth). The experimental results agree only partially with the theoretical calculations indicating the need to improve the existing thermodynamic database on the alloy system.

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