Thermal stability data of amorphous binary alloys

Wang, Rong

doi:10.1007/bf02868270

Cited by 31 publications

(4 citation statements)

References 89 publications

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“…In contrast, the alloys belonging to group (II) crystallize presumably by the another mechanism, e.g., surface effect, which possibly occurs prepared by SQ or VD method. However, it is also to be noted that the group (I) contains some alloys prepared by VD, e.g., Au 40 Fe 60 alloy 12) whose T x is 813 K and ∆H for cavity is calculated as 110 kJ/mol, which satisfies the applicability of the relationship mentioned above.…”

Section: Calculation Systemssupporting

confidence: 55%

“…Since the present model as well as the Miedema's model does not give T x theoretically, experimental data on T x were quoted from 531 binary alloys of 98 systems, [4][5][6][7][8][9]12) and 627 ternary alloys of 107 systems. Tables 1 and 2 summarize the binary and ternary alloy systems whose values of T x were calculated in the present study.…”

Section: Calculation Systemsmentioning

confidence: 98%

“…The alloys belonging to group (I) are mostly prepared by melt spun. The alloys belonging to group (II) are amounted to be 63 which are listed as dismissible alloy systems (Au-Fe, 12) Au-Co, 12) ), superconducting alloys (Nb-Zr 12) ), high melting temperature systems (Mo-based alloy, 12) Re-Ta, 12) Re-W 12) and Ta-W 12) ) and so on. Most of these alloys were prepared by splat quenching (SQ) or vapor deposition (VD).…”

Section: Calculation Systemsmentioning

confidence: 99%

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Calculations of Crystallization Temperature of Multicomponent Metallic Glasses

Takeuchi

Inoue

2002

Mater. Trans.

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A model for calculating crystallization temperature (T x ) of multicomponent metallic glasses is proposed by modifying the Miedema's model which is used for calculating T x of binary systems. The calculations were carried out for nearly 900 metallic glasses including 470 binary and 398 ternary alloys. In the present model, the cavity formation energy (∆H for cavity ) for multicomponent metallic glasses was theoretically derived on the basis of the Miedema's model. The equation for expressing the relation between experimental T x and theoretical ∆H for cavity was statistically analyzed by the least-squares method, yielding T x = 4.16 × ∆H for cavity + 318. The binary and ternary systems tend to show different equations between T x and ∆H for cavity . The inherent equation in each system was analyzed as simultaneous achievement of the increase in stability of metallic glasses and decrease in ∆H for cavity due to multicomponent alloying. Furthermore, the glass-forming ability was predicted by reduced crystallization temperature instead of reduced glass transition temperature. As a result, it was found that reduced crystallization temperature can be calculated close to reduced glass transition temperature except for Pt-, Pd-and La-based systems. It is of great importance that T x can be calculated for multicomponent metallic glasses by semi-empirical method.

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Section: Calculation Systemssupporting

confidence: 55%

Section: Calculation Systemsmentioning

confidence: 98%

Section: Calculation Systemsmentioning

confidence: 99%

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Calculations of Crystallization Temperature of Multicomponent Metallic Glasses

Takeuchi

Inoue

2002

Mater. Trans.

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“…Ni Nb alloys are amorphous in the composition range of 30 to 80at% Ni and their Krys, grows within the range 500 to 700 "C whcn the Nb content increases up to 50 at% [6]. The Ni-Nb/Si system was studied previously using different analytical methods [l to 31, but thc problems of morphological changcs during the reaction and the structure of interfaces are still open.…”

Section: Introductionmentioning

confidence: 99%

Interaction of thin films of Ni and Ni—Nb alloys with Si the action of the native SiO2 layer

Rozhanski¹,

Barg

Akimov³

1991

Phys. Stat. Sol. (a)

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Reactions of thin policrystalline Ni and amorphous Ni—Nb films with a Si (100) substrate in the temperature range of 200 to 770°C are studied by TEM, SEM, AES, and EDX methods. The crystallization of the Ni—Nb films is observed in‐situ in the TEM. The interaction of the Ni—Nb films with the substrate occurs above the crystallization temperature of the films and is found to be dependent on the heating rate. The reactions are accompanied by a phase separation process and the formation of large Ni silicide islands inside the substrate. No reaction of Ni films with Si is observed up to 650°C in the presence of a native SiO2 layer at the interface. An action of the stress gradients in Ni—Nb films and the corresponding formation of pinholes in the underlying native SiO2 layer is proposed to explain the results obtained.

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Diffusion in amorphen metallischen Legierungen

Heumann

Mehrer

1992

WFT Werkstoff-Forschung Und -Technik

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Thermal stability data of amorphous binary alloys

Cited by 31 publications

References 89 publications

Calculations of Crystallization Temperature of Multicomponent Metallic Glasses

Calculations of Crystallization Temperature of Multicomponent Metallic Glasses

Interaction of thin films of Ni and Ni—Nb alloys with Si the action of the native SiO2 layer

Diffusion in amorphen metallischen Legierungen

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