Thermal Stability and Relaxation Processes of The Ti-Cu- and Ti-Ni-Based Metallic Glasses

1993 ◽  
Vol 321 ◽  
Author(s):  
Nikolay G. Babich ◽  
Nikolay N. Dashevsky ◽  
Olesja I. Nakonechna ◽  
Sergey L. Revo ◽  
Nikolay I. Zakharenko
Keyword(s):  
Thermal Stability ◽  
Magnetic Susceptibility ◽  
Metallic Glasses ◽  
Amorphous Alloys ◽  
Relaxation Processes ◽  
Spin Moment ◽  
Temperature Range ◽  
Impurity Atoms ◽  
Temperature Dependences ◽  
Thermal Stability Of

ABSTRACTTemperature dependences of magnetic susceptibility for Ti-Cu- and Ti-Ni-based amorphous alloys have been obtained in the temperature range 300–850 K. All investigated alloys are shown to be Pauli paramagnets. Fe and Co impurity atoms possess zero localized moment due to effect of spin moment quenching. Relaxation processes were studied using thermopower measurements. It was shown the thermal stability of investigated alloys is determined predominantly by Nagel-Tauc electronic criterion.

scholarly journals Synthesis and Properties of Bulk Metallic Glasses in Pd-Ni-P and Pd-Cu-P Alloys

1996 ◽  
Vol 455 ◽  
Author(s):  
Y. He ◽  
R. B. Schwarz
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Metallic Glasses ◽  
Amorphous Alloys ◽  
Composition Range ◽  
Wide Composition Range ◽  
Upper Limit ◽  
Ternary Alloy Systems ◽  
The Difference ◽  
Thermal Stability Of

ABSTRACTBulk amorphous Pd-Ni-P and Pd-Cu-P alloy rods with diameters ranging from 7 to 25 mm have been synthesized over a wide composition range using a fluxing technique. For most bulk amorphous Pd-Ni-P alloys, the difference ΔT = Tx - Tg between the crystallization temperature Tx and the glass transition temperature Tg is larger than 90 K, while for bulk amorphous Pd-Cu-P alloys, ΔT varies from 27 to 73 K. Pd40Ni40P20 has the highest glass formability, and 300-gram bulk amorphous cylinders, 25 mm in diameter and 50 mm in length, can be easily produced. This size, however, is not an upper limit. The paper presents the glass formation ranges for both ternary alloy systems and data on the thermal stability of the amorphous alloys, as well as their specific heat, density, and elastic properties.

Structural Stability and Elasticity in Zr-Based Bulk Metallic Glasses

2007 ◽  
Vol 561-565 ◽  
pp. 1391-1395 ◽  
Author(s):  
Shuo Zhang ◽  
T. Ichitsubo ◽  
Yokoyama Yoshihiko ◽  
K. Miyagi ◽  
Eiichiro Matsubara
Keyword(s):  
Thermal Stability ◽  
Metallic Glass ◽  
Bulk Modulus ◽  
Bulk Metallic Glass ◽  
Structural Stability ◽  
Metallic Glasses ◽  
Amorphous Alloys ◽  
Coordination Numbers ◽  
Constituent Elements ◽  
Thermal Stability Of

The structure, thermal stability and elasticity of Zr50Cu40Al10 bulk metallic glass (BMG) have been investigated with reference to Zr70Cu30 and Zr70Cu20Al10 amorphous alloys. The thermal stability of Zr50Cu40Al10 is significantly enhanced in comparison compared with those of the others. The large total coordination numbers more than 11 around all constituent elements are observed in Zr50Cu40Al10. A change of the bulk modulus in the crystallization is extremely small in Zr50Cu40Al10. The present experimental results indicate that atoms in the Zr50Cu40Al10 glass are closely packed and its microstructure is fairly uniform. This results in the much higher thermal stability of Zr50Cu40Al10.

scholarly journals Thermal Stability of Field- and Stress-Induced Anisotropy in Nanocrystalline Fe-Based and Amorphous Co-Based Alloys

1999 ◽  
Vol 32 (1-4) ◽  
pp. 281-287 ◽  
Author(s):  
N. V. Dmitrieva ◽  
V. A. Lukshina ◽  
G. V. Kurlyandskaya ◽  
A. P. Potapov
Keyword(s):  
Thermal Stability ◽  
Magnetic Anisotropy ◽  
Amorphous Alloys ◽  
Nanocrystalline Alloy ◽  
Induced Anisotropy ◽  
External Effects ◽  
Nanocrystalline And Amorphous ◽  
Induced Magnetic Anisotropy ◽  
Stress Induced Anisotropy ◽  
Thermal Stability Of

Thermal stability of induced magnetic anisotropy (IMA) was studied in a course of subsequent annealings without any external effects for already field- or stress-annealed specimens of the nanocrystalline Fe73.5Cu1Nb3Si13.5B9 and amorphous Fe3Co67Cr3Si15B12 alloys. For these alloys the dependence of IMA thermal stability on the magnitude of the IMA constant (Ku) and temperature of stress-annealing was investigated. For the nanocrystalline alloy thermal stability of field- and stress-induced anisotropy with identical Ku was compared. It was shown that nanocrystalline specimens with identical Ku values after field- or stress-annealing have identical thermal stability of IMA. This can point to a similarity of the mechanisms of IMA formation after field- or stress-annealings. Thermal stability of stress-induced anisotropy in the nanocrystalline alloy with Ku value less than 1000 J/m3 and the amorphous alloy with Ku less than 100 J/m3 depends on the value of Ku. For both stress-annealed nanocrystalline and amorphous alloys magnetic anisotropy induced at higher temperatures is more stable because more long-range and energy-taking processes take place at these temperatures.

Influence of casting temperature on the thermal stability of Zr-based metallic glasses

2010 ◽  
Vol 496 (1-2) ◽  
pp. 595-599 ◽  
Author(s):  
J. Mao ◽  
H.F. Zhang ◽  
H.M. Fu ◽  
A.M. Wang ◽  
H. Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Metallic Glasses ◽  
Casting Temperature ◽  
Thermal Stability Of

THERMAL STABILITY OF AMORPHOUS ALLOYS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-559-C8-562 ◽  
Author(s):  
K. H.J. Buschow
Keyword(s):  
Thermal Stability ◽  
Amorphous Alloys ◽  
Thermal Stability Of

Glass formability and thermal stability of Al–Ni–Y–Be amorphous alloys

2007 ◽  
Vol 434-435 ◽  
pp. 190-193 ◽  
Author(s):  
Joong-Hwan Jun ◽  
Jeong-Min Kim ◽  
Ki-Tae Kim ◽  
Woon-Jae Jung
Keyword(s):  
Thermal Stability ◽  
Amorphous Alloys ◽  
Thermal Stability Of
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