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Zr-Cu-Ni-Al-Nb bulk amorphous alloy with high zirconium content

A technology of amorphous alloy and zirconium content, which is applied in the field of Zr-Cu-Ni-Al-Nb bulk amorphous alloy with high zirconium content, can solve the problems of increasing the specific gravity of the alloy, and achieve the effect of reducing the specific gravity and content

Inactive Publication Date: 2010-01-06
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to improve the plasticity of the Zr-Cu-Ni-Al alloy system, people have recently used the method of composition design to obtain alloys with high plasticity. For example, the research group of Wang Weihua, Institute of Physics, Chinese Academy of Sciences found that Zr 61.88 Cu 18 Ni 10.12 al 10 、Zr 64.13 Cu 15.5 Ni 10.12 al 10 and Zr 62 Cu 15.5 Ni 12.5 al 10 The alloy has a room temperature compression plastic deformation of up to 160%, but the Zr content in this type of alloy is generally less than 66%. Relatively speaking, the content of Cu and Ni elements is relatively high, thus increasing the specific gravity of the alloy

Method used

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  • Zr-Cu-Ni-Al-Nb bulk amorphous alloy with high zirconium content
  • Zr-Cu-Ni-Al-Nb bulk amorphous alloy with high zirconium content

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Embodiment 1

[0024] The zirconium-based bulk amorphous alloy with high zirconium content has the following chemical composition (atomic percentage): Zr66.0%, Ni9.0%, Nb6.5%, Al8.0%, Cu10.5%. After using a water-cooled copper mold to cast a round rod with a diameter of 2mm, the X-ray diffraction spectrum of the cross-section of the round rod sample confirms that the entire sample is an amorphous structure, see figure 1 The upper curve; from the continuous heating DSC crystallization curve, a very typical exothermic step due to glass transition and exothermic reaction caused by crystallization transition can be observed, see figure 2 The upper curve, the initial crystallization temperature T of the sample x is 706K, the glass transition temperature T g is 603K, the width of the supercooled liquid phase region ΔT x It is 103K, see Table 1, indicating that the thermal stability and glass forming ability are very good; room temperature compression plastic deformation curve, see image 3 (A)...

Embodiment 2

[0026] The zirconium-based bulk amorphous alloy with high zirconium content has the following chemical composition (atomic percentage): Zr68.0%, Ni9.0%, Nb5.5%, Al8.0%, Cu9.5%. This alloy is in Zr 66 Ni 9 Nb 6.5 Cu 10.5 Al 8 In the alloy, the atomic percentage content of zirconium element and copper element is increased, and the relative content of niobium element is reduced. After using a water-cooled copper mold to cast a round rod with a diameter of 2mm, the X-ray diffraction spectrum of the cross-section of the round rod sample confirms that the entire sample is an amorphous structure, see figure 1 Middle curve; from the continuous heating DSC crystallization curve, one can observe a very typical exothermic step due to glass transition and exothermic reaction caused by crystallization transition, see figure 2 In the middle curve, the initial crystallization temperature T of this alloy x 701K, glass transition temperature T g is 614K, the width of the supercooled li...

Embodiment 3

[0028] The zirconium-based bulk amorphous alloy with high zirconium content has the following chemical composition (atomic percentage): Zr70.5%, Ni8.5%, Nb5.0%, Al8.0%, Cu8.0%. This alloy is in Zr 68 Ni 9 Nb 5.5 Cu 9.5 al 8 In the alloy, it is obtained by continuing to increase the atomic percentage content of zirconium and copper elements. After using a water-cooled copper mold to cast a round rod with a diameter of 2mm, the X-ray diffraction spectrum of the cross-section of the round rod sample confirms that the entire sample is an amorphous structure, see figure 1 Lower curve; from the continuous heating DSC crystallization curve, a very typical exothermic step due to glass transition and exothermic reaction caused by crystallization transition can be observed, see figure 2 The lower curve, the initial crystallization temperature T of this alloy x is 674K, the glass transition temperature T g is 604K, the width of the supercooled liquid phase region ΔT x It is 70K,...

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Abstract

The invention relates to a Zr-Cu-Ni-Al-Nb bulk amorphous alloy with high zirconium content. The Zr-Cu-Ni-Al-Nb bulk amorphous alloy includes the following chemical components (atom percent): 66-72 Zr, 7.0-10.0 Ni, 3.0-7.0 Nb, l6.0-10.0 Al and 8.0-12.0 Cu. The material can form a bulk amorphous alloy under the ordinary casting condition, the required critical cooling rate is low, the thermal stability is good and a wide surfusion phase region is provided; under the condition that the atom percent of Zr is not lower than 66 percent, the corrosive resistance of the bulk amorphous alloy to various acid, alkali and salt is enhanced and the specific weight of the alloy is reduced; the plastic deformation property of the bulk amorphous alloy is enhanced by adding a proper amount of Nb elements, and the compression plastic deformation amount at the room temperature is higher than 7 percent; and meanwhile, the alloy has good corrosive resistance in high-temperature and high pressure water at 300-400 DEG C and in steam, proper mechanical property and lower atomic heat neutron absorption cross section.

Description

Technical field: [0001] The invention relates to the field of bulk amorphous alloys, in particular to a Zr-Cu-Ni-Al-Nb bulk amorphous alloy with high zirconium content. Background technique: [0002] Due to its unique disordered and short-range ordered structure, amorphous alloys have the characteristics of general metals and glasses. In particular, Zr-based bulk amorphous alloys have attracted much attention due to their good amorphous-forming ability, thermal stability, and mechanical properties. Among them, the Zr-Cu-Ni-Al alloy system is one of the best bulk amorphous alloy-forming systems so far. In recent years, a series of new bulk amorphous alloys have been prepared by adding metal elements such as Ag, Zn and Ti to the Zr-Cu-Ni-Al alloy system. These added elements will cause changes in the amorphous forming ability, thermal stability, crystallization behavior and mechanical properties of the alloy system. However, according to research reports, these added elemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/10
Inventor 惠希东刘胜男王美玲王树申常静王云亮陈国良
Owner UNIV OF SCI & TECH BEIJING
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