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Method for designing components of large piece of non-crystalline alloy

A technology of amorphous alloy and design method, which is applied in the field of design of amorphous alloy composition, and can solve problems such as incomplete compliance, amorphous alloy not fully conforming to empirical laws, etc.

Inactive Publication Date: 2005-01-12
JILIN UNIV
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Problems solved by technology

[0003] However, with the emergence of a large number of bulk amorphous alloys, it was found that some bulk amorphous alloys do not fully conform to the empirical laws proposed by Inoue et al.
For example, although the Pd-Cu-Ni-P system exhibits a strong ability to form amorphous crystals, it does not fully obey the above three empirical laws

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  • Method for designing components of large piece of non-crystalline alloy
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  • Method for designing components of large piece of non-crystalline alloy

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Embodiment Construction

[0029] Judgment of Alloy Amorphous Formation Ability

[0030] The critical cooling rate R of typical metallic amorphous alloys c For the relationship with the e / a value, seefigure 1 . The valence electron values ​​of specific elements are listed in Table 1 [Zeitschrift fur Kristallographie 215 (2000) 429], and the e / a value of the alloy can be obtained by the algebraic sum of the corresponding elements. because the lowest R c The value corresponding to the best amorphous-forming ability is the way to measure liquids with the most negative enthalpy, so e / a = 3.5 at R c The minimum point of the curve indicates that the liquid is in the lowest energy state, the crystallization driving force is the smallest, and the amorphous formation ability of the alloy is the strongest here.

[0031] Table 1 Valence electron values ​​of some elements

[0032] e e e e e

[0033] Be 2 Si 4 Ni 4 Zr 3.59 Pt 4

[0034] B 3 P 3 Cu 3 Nb ...

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Abstract

This invention relates to a design method for obtaining alloy components of big amorphous alloy which selects alloy components according to the following conditions so as to make the internal energy of liquid phase the lowest, suitable for obtaining big amorphous alloy blocks, a. The value of alloy electron concentration e / a is 3-5, and e is the total electronic numbers of elements in a unit cell, a is the electronic numbers of an element in a unit cell, b, the total alley number is 4-5.

Description

technical field [0001] The invention relates to a method for designing the composition of an amorphous alloy, in particular to a method for designing an alloy composition that can obtain bulk amorphous alloys. Background technique [0002] The importance of bulk amorphous alloys is not only reflected in their superior mechanical and magnetic properties in industrial applications, but also as a basis for understanding liquid structures and liquid-solid transitions. Since 1960, when Duwez et al. used rapid solidification technology to successfully prepare Au-Si amorphous alloy flakes with a thickness of tens of microns for the first time, people have been looking for ways to improve the ability of amorphous formation. Until the early 1990s, Inoue, Johnson and others worked independently, through alloy composition design, and produced a variety of bulk amorphous alloys under conventional casting conditions, breaking through the high cooling rate limit for preparing amorphous al...

Claims

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Application Information

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IPC IPC(8): C22C1/00C22C45/00
Inventor 迟宝全李建忱陆海鸣赵明文子蒋青
Owner JILIN UNIV
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