Enhancement of glass-forming ability of FeGaPCB bulk glassy alloy with high saturation magnetization

2007 ◽  
Vol 15 (5-6) ◽  
pp. 655-658 ◽  
Author(s):  
Baolong Shen ◽  
Masahiro Akiba ◽  
Akihisa Inoue
Keyword(s):  
Saturation Magnetization ◽  
Glassy Alloy ◽  
Glass Forming Ability ◽  
High Saturation Magnetization ◽  
Glass Forming ◽  
High Saturation ◽  
Bulk Glassy Alloy

Effect of Co Addition on the Glass-Forming Ability and Mechanical Properties of Ti-Zr-Be-Cu-Co Bulk Amorphous Alloys

2012 ◽  
Vol 182-183 ◽  
pp. 203-207
Author(s):  
Zhong Yuan Suo ◽  
Yan Ling Song ◽  
Ke Qiang Qiu
Keyword(s):  
Mechanical Properties ◽  
Glassy Alloy ◽  
Glass Forming Ability ◽  
Yield Strain ◽  
Scanning Calorimetry ◽  
High Fracture ◽  
Glass Forming ◽  
Transmission Electron ◽  
Bulk Glassy Alloy ◽  
Co Addition

The effect of Co substitution for Be on the glass-forming ability and mechanical properties was investigated in Ti35Zr30Be27.5-xCu7.5Cox (x=0, 3.5, 7.5, 11.5 at.%) alloys by using X-ray diffractometry (XRD), differential scanning calorimetry (DSC), high-resolution transmission electron microscopy (HRTEM) and compression test. With the substitution of Co for Be, glass-forming ability (GFA) is significantly enhanced and fully amorphous rods with a diameter of up to 12 mm were produced in the alloy with 3.5 and 7.5 at.% Co. The Ti35Zr30Be24Cu7.5Co3.5 bulk glassy alloy exhibits good plasticity of 4% during compressive applied load at ambient temperature in conjunction with distinct yield strain of 2% and high fracture strength of 2196 MPa. The effect of the addition of Co on the structure and deformation behavior of the Ti35Zr30Be27.5-xCu7.5Cox (x=0, 3.5, 7.5, 11.5 at.%) alloys is discussed.

Effect of Y addition on thermal stability and the glass forming ability in Fe–Nb–B–Si bulk glassy alloy

2006 ◽  
Vol 435-436 ◽  
pp. 425-428 ◽  
Author(s):  
Jin Man Park ◽  
Joon Sik Park ◽  
Jong Hyun Na ◽  
Dong Ho Kim ◽  
Do Hyang Kim
Keyword(s):  
Thermal Stability ◽  
Glassy Alloy ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
Bulk Glassy Alloy

A Ti-based bulk glassy alloy with high strength and good glass forming ability

2010 ◽  
Vol 18 (10) ◽  
pp. 1837-1841 ◽  
Author(s):  
Ke-Fei Xie ◽  
Ke-Fu Yao ◽  
Tian-You Huang
Keyword(s):  
Glassy Alloy ◽  
High Strength ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
Bulk Glassy Alloy

GLASS FORMING ABILITY OF HARD MAGNETIC Nd55Al20Fe25 BULK GLASSY ALLOY WITH DISTINCT GLASS TRANSITION

2005 ◽  
Vol 19 (22) ◽  
pp. 3493-3500 ◽  
Author(s):  
L. XIA ◽  
C. L. JO ◽  
Y. D. DONG
Keyword(s):  
Glass Transition ◽  
Glassy Alloy ◽  
Bulk Sample ◽  
Glass Forming Ability ◽  
Glassy Matrix ◽  
Section Thickness ◽  
Xrd Pattern ◽  
Glass Forming ◽  
Bulk Glassy Alloy ◽  
Hard Magnetic Properties

Nd 55 Al 20 Fe 25 bulk sample was prepared in the shape of rods 3 mm in diameter by suction casting. The sample exhibits typical amorphous characters in XRD pattern, distinct glass transition in DSC traces and hard magnetic properties. The distinct glass transition, which is invisible in DSC traces of previously reported Nd — Al — Fe ternary BMGs, allows us to investigate the glass forming ability (GFA) of Nd 55 Al 20 Fe 25 alloy using the reduced glass transition temperature Trg and the recently defined parameter γ. However, it is found that the obtained diameter of the Nd 55 Al 20 Fe 25 glassy rod is much larger than the critical section thickness of the BMG predicted by either Trg or γ. The microstructure of Nd 55 Al 20 Fe 25 as-cast rod was studied and the apparent GFA of the alloy was supposed to be enhanced by the metastable nano-precipitates dispersed within the glassy matrix.

Soft Magnetic Bulk Glassy Alloy Synthesized by Flux Melting and Water Quenching

2007 ◽  
Vol 539-543 ◽  
pp. 1921-1925 ◽  
Author(s):  
Akihiro Makino ◽  
Teruo Bitoh ◽  
Akihisa Inoue ◽  
A. Lindsay Greer
Keyword(s):  
Cooling Rate ◽  
Glassy Alloy ◽  
Glass Forming Ability ◽  
Water Quenching ◽  
Soft Magnetic ◽  
Glass Forming ◽  
Large Bulk ◽  
Mold Casting ◽  
Molten Flux ◽  
Bulk Glassy Alloy

The flux treatment was applied to increase the glass-forming ability of a glassy [(Fe0.5Co0.5)0.75B0.20Si0.05]96Nb4 alloy. The large bulk glassy specimen with diameter of 7.7 mm was prepared by water quenching the melt immersed in the molten flux of B2O3. The diameter of the specimens is approximately 1.5 times as large as the previous result, even though the cooling rate of copper mold casting should be much higher than that of water quenching. The critical cooling rate for a glassy phase is 150 - 170 K/s, which is much slower than 500 K/s without the flux treatment. The flux treatment improves the glass-forming ability by cleaning the molten metal where heterogeneous nucleation is difficult to take place.

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