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Zr TiNi quasi-crystal with compactness and high elastic deformation property and composition design method

A technology of composition design and high elasticity, applied in the field of new Zr-Ti-Ni quasicrystals, can solve the problems of composition design and material preparation process constraints, and achieve the effect of clear theoretical basis

Inactive Publication Date: 2002-07-17
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

The compositional design and material preparation process of quasicrystals have become bottlenecks restricting further development

Method used

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  • Zr TiNi quasi-crystal with compactness and high elastic deformation property and composition design method
  • Zr TiNi quasi-crystal with compactness and high elastic deformation property and composition design method
  • Zr TiNi quasi-crystal with compactness and high elastic deformation property and composition design method

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Experimental program
Comparison scheme
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Embodiment

[0023] Embodiment, the law of quasicrystal formation and its performance characterization in Zr-Ti-Ni

[0024] In the first step, the ternary system is decomposed into a binary quasicrystal system, where both Zr-Ni and Ti-Ni may form quasicrystals.

[0025] Step two, obtain the binary composition point that has the tendency to form quasicrystal, in Zr 2 Ni and Ti 2 There are FCC quasicrystal-related phases at Ni, and Zr-based and Ti reference crystals are based on these two components.

[0026] Step 3, connect these quasicrystal components and the third component to construct the variable electron concentration line. In this example, there are two variable electron concentration lines, which are Zr 2 Ni-Ti and Ti 2 Ni-Zr.

[0027]Step 4, if there are two variable electron concentration lines, the intersection point is the ternary quasicrystal composition; if there is only one variable electron concentration line, it is necessary to know in advance the electron concentrati...

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Abstract

The present invention relates to a ZrTiNi quasicrystal and its composition design method. When the multicomponent system quasicrystal composition is defined, firstly, the multicomponent system is decomposed into subgroup component system, then the quasicrystal component point of subgroup component system and third grou pcomponent are lined, and the cross-point of its with quasicrystal isoelectronic concentration line is the ideal composition of the multicomponent system quasicrystal. For example, it utilizes copper mould suction-moulding process to prepare compact Zr-Ti-Ni quasicrystal with high elastic deformation capability, its room-temp. compressive strength exceeds 1000 MPa, its elastic strain is up to 5.2%, electronic concentration range is 1.20-1.25 and its typical composition is Zr40Ti40Ni20.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a quantitative method for designing the composition of a quasicrystal alloy represented by a Zr-based system and a new Zr-Ti-Ni quasicrystal derived from the method. Background technique [0002] Quasicrystals are solid-state ordered phases with both long-range quasi-periodic translational order and amorphous rotational symmetry. Since its discovery in 1984, it can basically be divided into two stages: the first stage begins with the discovery of the first Al-(Mn, Fe, Cr) quasicrystal, because the early quasicrystal is a metastable film or ribbon produced by rapid cooling, The quality of the sample is not high, and the experimental research on atomic structure and performance is greatly restricted. The second stage began in 1987. A stable and structurally complete Al-Cu-transition metal ternary quasicrystal was discovered. The material can be prepared by conventional met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C16/00C22C30/00C22C45/10
Inventor 董闯羌建兵王英敏包翠敏王德和
Owner DALIAN UNIV OF TECH
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