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Large size ZrTi quasicrystal material and preparation method thereof

A large-size, benchmark technology, applied in the field of large-size ZrTi benchmark crystal alloys and its preparation, can solve problems such as high cooling rate requirements, unfavorable understanding of the formation mechanism of ZrTi benchmark crystal materials, and unfavorable applications of ZrTi benchmark crystal materials , to achieve the effect of simple preparation process

Active Publication Date: 2015-09-16
YANSHAN UNIV
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  • Application Information

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Problems solved by technology

At present, the ZrTi reference crystal material is mainly obtained by rapid cooling and solidification by the melt suspension method. This method requires a high cooling rate, especially for TiZrNi bulk quasicrystals, and it is difficult to obtain pure quasicrystals with conventional quasicrystal preparation techniques.
This is not only unfavorable to the understanding of the formation mechanism of ZrTi reference crystal materials, but also unfavorable for the application of ZrTi reference crystal materials as structural materials.

Method used

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  • Large size ZrTi quasicrystal material and preparation method thereof
  • Large size ZrTi quasicrystal material and preparation method thereof
  • Large size ZrTi quasicrystal material and preparation method thereof

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Embodiment Construction

[0023] By preparing 12 mm (Ti 40 Zr 40 Ni 20 ) 84 Be 16 The quasicrystal rod is taken as an example to describe the present invention in detail.

[0024] Follow Ti 40 Zr 40 Ni 20 (Atomic percentage) The required elemental raw materials (purity not less than 99.9% by weight) are mixed with the composition ratio and then added to the vacuum electric arc furnace. Before smelting the alloy, the equipment is vacuumed until the vacuum degree reaches 6×10 -4 At Pa, fill with high-purity argon (purity 99.99wt%) until the pressure in the arc furnace cavity is 6×10 4 Smelting starts at Pa. Before smelting the alloy, the titanium ball is melted, oxygen is absorbed for 1 minute through oxidation reaction, and then the raw materials are smelted under the protection of argon. The smelting current is 200-300 amperes. When all the solid materials are melted into liquid, they are cooled in a water-cooled copper crucible. Obtained as Ti 40 Zr 40 Ni 20 Of the master alloy ingot. The smelting proce...

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Abstract

A large size ZrTi quasicrystal material uses ZrTi quasicrystal as a main component, and is prepared from Ti, Zr, Ni, and Be in the following atom ratio percentage: (Ti40Zr40Ni20) 100-xBex, wherein x is 1-16, the volume percentage of the ZrTi quasicrystal is more than 90%, and the rod diameter is 3-12mm. The preparation method of the ZrTi quasicrystal material is mainly as follows: first a uniform composition Ti40Zr40Ni20 alloy ingot is melted by a vacuum arc furnace, then Be element is added, a uniform composition (Ti40Zr40Ni20) 100-xBex alloy ingot is prepared by melting in the vacuum arc furnace, and different sizes of quasicrystal materials are obtained by copper mold suction casting technology. The quasicrystalline material is one of the largest quasicrystalline material prepared under the same conditions, quasi alloy composition is continuously adjustable, by varying the alloy composition, the 3-12mm large size ZrTi quasicrystal material can be obtained, the large size ZrTi quasicrystal material can be directly obtained without subsequent processing process, and the preparation technology is simple.

Description

Technical field [0001] The invention relates to a large-size ZrTi reference crystal alloy and a preparation method thereof. Background technique [0002] Since Shechtman et al. discovered quasicrystalline phases in Al-Mn alloys in the 1980s, quasicrystals have attracted extensive attention with their unique structure. A large number of studies have shown that quasicrystalline materials have unique physical and chemical properties, such as high hardness, low friction coefficient, non-stick and wear resistance. [0003] In the past ten years, people have carried out a lot of research work on ZrTi reference crystal materials. The study found that the ZrTi reference crystal material has a thermodynamically stable icosahedral structure, which exhibits special transmission characteristics, hydrogen storage characteristics and mechanical properties. It is expected to be used as structural materials and functional materials in the energy, automotive, aviation and other industrial fields. ...

Claims

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Application Information

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IPC IPC(8): C22C45/10C22C1/03
Inventor 王利民李子敬赵林然
Owner YANSHAN UNIV
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