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Amorphous alloy composition design method based on thermodynamics factors and structural factors

An amorphous alloy and composition design technology, applied in the field of amorphous alloy composition design, can solve the problems of low accuracy of amorphous alloy and difficulty in accurately calculating the value of valence electron concentration, etc., so as to achieve easy understanding and mastery, and reduce errors efficiency, and the effect of improving accuracy

Inactive Publication Date: 2014-04-09
HOHAI UNIV CHANGZHOU
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Problems solved by technology

The limitation of this method is that on the one hand, the composition design can only be carried out in the ternary or pseudo-ternary alloy system; the valence electrons of each element itself change with the change of the alloy environment, so it is actually difficult to accurately calculate the The value of the valence electron concentration
However, unlike the phase diagram calculation which focuses on the stability of the liquid phase, this method focuses on the competition between the amorphous phase and other phases, and the calculation methods are often more diverse and simpler, but the method is accurate in designing amorphous alloys. Sex is not high

Method used

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  • Amorphous alloy composition design method based on thermodynamics factors and structural factors
  • Amorphous alloy composition design method based on thermodynamics factors and structural factors
  • Amorphous alloy composition design method based on thermodynamics factors and structural factors

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Embodiment 1

[0028] Taking the Cu-Zr-Ti alloy system as an example, since the Cu-Zr binary alloy has a good ability to form amorphous, Cu-Zr is selected as the basic binary alloy. Then, because the Zr atomic radius is 9.6% larger than the Ti atomic radius, and the Cu atomic radius is 12.6% smaller than the Ti atomic radius, according to the empirical principle that the atomic radius difference between the three main elements in the alloy system is greater than 12%, Ti is selected. element is the third component.

[0029] From the five Cu-Zr binary alloy composition points in the ternary alloy diagram (Cu 61.8 Zr 38.2 , Cu 56 Zr 44 , Cu 45.7 Zr 54.3 , Cu 64 Zr 36 , Cu 50 Zr 50 ) to connect the Ti endpoints to obtain the atomic structure prediction composition line. If the binary alloy has multiple amorphous composition points, then there will be multiple such atomic structure prediction composition lines in the ternary alloy diagram. Then calculate the Cu-Zr-Ti ternary alloy at e...

example 2

[0033] Taking the Cu-Zr-Al alloy system as an example, Cu-Zr is chosen as the basic binary alloy because of its good amorphous forming ability. Then, because the atomic radius of Zr is 11.9% larger than that of Al, and the atomic radius of Cu is 12.0% smaller than that of Al, according to the empirical principle that the atomic radius difference between the three main elements in the alloy system is greater than 12%, Al is selected. element is the third component.

[0034] From the five Cu-Zr binary alloy composition points in the ternary alloy diagram (Cu 61.8 Zr 38.2 , Cu 56 Zr 44 , Cu 45.7 Zr 54.3 , Cu 64 Zr 36 , Cu 50 Zr 50 ) to connect the Al endpoints to obtain the atomic structure prediction composition line. If the binary alloy has multiple amorphous composition points, then there will be multiple such atomic structure prediction composition lines in the ternary alloy diagram. Then calculate the estimated value of Cu-Zr-Al ternary alloy ΔHh·ΔHmix·Sconfig at ...

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Abstract

The invention discloses an amorphous alloy composition design method based on thermodynamics factors and structural factors. The amorphous alloy composition design method comprises the following steps: (1) based on binary block body metal glass, selecting a third component with the principle that the atomic radius difference is about greater than 12%, and connecting a binary amorphous composition point with the third component in a ternary diagram to obtain an atomic structure predicted composition line; (2) based on the binary block body metal glass, calculating the delta Hh.delta Hmix.Sconfig predicted value under different contents of the third component, connecting each minimal value in a ternary alloy diagram to be a line, namely a predicted composition line of thermodynamics; and (3) researching the composition relevance between the alloy at the crossed part of the two predicted composition lines in (1) and (2) and the amorphous forming capacity, and determining the intersection point composition of the two predicted composition lines, namely the amorphous alloy composition of final design. According to the composition design method provided by the invention, the accuracy of amorphous alloy composition design is improved, and the error rate in developing novel amorphous alloys is reduced. The method is simple and clear, and easy to understand and grasp.

Description

technical field [0001] The invention relates to the field of amorphous alloys, in particular to a composition design method for amorphous alloys. Background technique [0002] Amorphous alloys are valued for their excellent hardness, strength, and corrosion resistance. Compared with oxide molecules, the volume of metal atoms is smaller, and it is easier to move and diffuse during the cooling process from liquid to solid state, so the cooling rate required to prepare amorphous alloys by cooling is much higher. The critical cooling rate for the preparation of amorphous alloys is generally 10 5 ~10 6 K / s or so, resulting in amorphous alloys can only be prepared in the shape of flakes, particles, thin wires and powders. By the end of the 1980s, due to the innovation of the composition of amorphous alloys, the critical cooling rate was greatly reduced, breaking through the small size limit of amorphous alloys, and creating a new era of application of amorphous alloys. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C45/10
Inventor 纪秀林赵建华
Owner HOHAI UNIV CHANGZHOU
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