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

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.

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

Thermal Stability of Fe82Nb2B14REM2 Amorphous Alloys

2020 ◽  
Vol 55 (6) ◽  
pp. 921-929
Author(s):  
M.-O. М. Danylyak ◽  
L. М. Boichyshyn
Keyword(s):  
Thermal Stability ◽  
Amorphous Alloys ◽  
Thermal Stability Of

Structure and thermal stability of biodegradable Mg–Zn–Ca based amorphous alloys synthesized by mechanical alloying

2011 ◽  
Vol 176 (20) ◽  
pp. 1637-1643 ◽  
Author(s):  
Moni Kanchan Datta ◽  
Da-Tren Chou ◽  
Daeho Hong ◽  
Partha Saha ◽  
Sung Jae Chung ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mechanical Alloying ◽  
Amorphous Alloys ◽  
Thermal Stability Of

Crystallization of Ni-Cr-Si-B and Ni-Cr-Fe-Si-B Amorphous Alloys

2014 ◽  
Vol 216 ◽  
pp. 35-38 ◽  
Author(s):  
Cosmin Codrean ◽  
Dragoş Buzdugan ◽  
Ramona Lǎzar ◽  
Viorel Aurel Şerban ◽  
Ion Mitelea
Keyword(s):  
Thermal Stability ◽  
Chemical Composition ◽  
Rapid Solidification ◽  
Amorphous Alloys ◽  
Structural Characteristics ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
Melting Temperatures ◽  
Dta Analysis ◽  
Thermal Stability Of

Ni based amorphous alloys with Si and B, which can also, contains Fe and Cr, prepared by rapid solidification, have low melting temperatures. This fact increases their susceptibility to be joined by welding and brazing. The glass forming ability (GFA) is conditioned also by the crystallization delay, due to certain chemical composition of the alloys. The thermal stability of these alloys was revealed by DTA analysis and structural characteristics were investigated by XRD. Applying an annealing at temperatures between 420°C and 540°C, with 30 minutes maintaining time, allowed the investigation of phase occurred during the crystallization and the estimation of the crystalline grains dimensions.

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.

Thermal Stability of Amorphous Ti- Cu- Ni- Sn Prepared by Mechanical Alloying

2007 ◽  
Vol 534-536 ◽  
pp. 233-236 ◽  
Author(s):  
N.T.H. Oanh ◽  
Pyuck Pa Choi ◽  
Ji Soon Kim ◽  
Dae Hwan Kwon ◽  
Young Soon Kwon
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Mechanical Alloying ◽  
Amorphous Alloys ◽  
High Energy ◽  
Scanning Calorimetry ◽  
Thermal Stability Of

Ti-Cu-Ni-Sn quaternary amorphous alloys of Ti50Cu32Ni15Sn3, Ti50Cu25Ni20Sn5, and Ti50Cu23Ni20Sn7 composition were prepared by mechanical alloying in a planetary high-energy ballmill (AGO-2). The amorphization of all three alloys was found to set in after milling at 300rpm speed for 2h. A complete amorphization was observed for Ti50Cu32Ni15Sn3 and Ti50Cu25Ni20Sn5 after 30h and 20h of milling, respectively. Differential scanning calorimetry analyses revealed that the thermal stability increased in the order of Ti50Cu32Ni15Sn3, Ti50Cu25Ni20Sn5, and Ti50Cu23Ni20Sn7.

ChemInform Abstract: Thermal Stability of Hydrides of Disordered and Amorphous Alloys

ChemInform ◽  
1987 ◽  
Vol 18 (29) ◽  
Author(s):  
J. S. CANTRELL ◽  
R. C. JUN. BOWMAN ◽  
G. BAMBAKIDIS
Keyword(s):  
Thermal Stability ◽  
Amorphous Alloys ◽  
Thermal Stability Of
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