Mg-Ni-Gd-Ag serial block amorphous alloy and preparation method thereof

An amorphous alloy, mg75-xni15gd10agx technology, applied in the field of Mg-Ni-Gd-Ag magnesium-based bulk amorphous alloy and its preparation, and metal alloy materials, can solve the problems of low amorphous forming ability, and achieve high Amorphous forming ability, high magnesium content, good corrosion resistance

Inactive Publication Date: 2010-05-26
TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a Mg-Ni-Gd-Ag system bulk amorphous alloy and its preparation method by adding Ag element, to overcome the problem of low amorphous forming ability of Mg-Ni based alloys at present, and to enrich the amorphous alloy Composition system to obtain amorphous alloy with high amorphous forming ability, high strength and high corrosion resistance and preparation method

Method used

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  • Mg-Ni-Gd-Ag serial block amorphous alloy and preparation method thereof
  • Mg-Ni-Gd-Ag serial block amorphous alloy and preparation method thereof
  • Mg-Ni-Gd-Ag serial block amorphous alloy and preparation method thereof

Examples

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Embodiment 1

[0017] Example 1: Mg with a diameter of 3.0 mm 74 Ni 15 Gd 10 Ag 1 Preparation of Columnar Bulk Amorphous Alloy

[0018] The magnesium-based bulk amorphous alloy is prepared by using Mg, Ni, Gd and Ag with a raw material purity of 99.9% in a molar mass ratio of 74:15:10:1. First, Ni, Gd, and Ag are melted in an electric arc furnace to obtain a master alloy with uniform composition. Before smelting, the electric arc furnace chamber is vacuumed to 1.2×10 -3 Pa is filled with 0.8 atmospheric pressure of high-purity argon as a protective gas. Ti balls are used to further purify the protective gas during smelting. The master alloy should be turned over before each smelting process. During the smelting process, the metal liquid is stirred by electric arc and electromagnetic to ensure the uniform composition of the alloy ingot. The surface of the intermediate alloy ingot obtained by arc melting is ground and broken, and then put into the crucible together with magnesium in the ...

Embodiment 2-7

[0024] Magnesium-based bulk amorphous alloys with various compositions were prepared according to the method of Example 1, and their composition and performance parameters are listed in Table 2, where σ is the compressive fracture strength.

[0025] Each magnesium-based bulk amorphous alloy composition and performance parameters in table 2 embodiment 2-7

[0026]

[0027]

[0028] From the data in Table 1 and Table 2, it can be seen that the Mg-based amorphous alloy provided by the present invention has a relatively high width of the supercooled liquid phase region, and the addition of appropriate Ag elements can effectively increase the size of the preparation. In particular, the composition is Mg 69 Ni 15 Gd 10 Ag 6 , it has the largest forming ability, and the preparation size is 6mm. At the same time, the addition of an appropriate amount of Ag elements can improve the fracture strength, especially, Mg 70 Ni 15 Gd 10 Ag 5 It has the maximum compression breaki...

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Abstract

The invention relates to an Mg-Ni-Gd-Ag serial block amorphous alloy and a preparation method thereof, belonging to the technical field of alloy materials. The alloy uses Mg as a main element, and the formula of the alloy is Mg75-xNi15Gd10Agx(x is not more than 0 and not less than 7), wherein x is the atom percentage of the Ag element, and the purity of all elements is not lower than 99.9 percent. After being weighed according to the atom percentage, the elements of Ni, Gd and Ag are smelted and cooled in an argon atmosphere electric arc furnace; after being broken, the obtained three-element intermediate alloy ingot is smelted in an induction furnace with Mg with corresponding mass; and the product is resmelted and sprayed in a metal cavity to obtain the Mg-based block amorphous alloy Mg75-xNi15Gd10Agx. The Mg-based block amorphous alloy has the advantages of high amorphous formation ability, high Mg content, high strength, good corrosion resistance, and the like. The serial Mg-based block amorphous alloy has wide application prospect in the fields of novel light structure materials, and the like by excellent performance.

Description

technical field [0001] The invention relates to a metal alloy material, in particular to a Mg-Ni-Gd-Ag series magnesium-based bulk amorphous alloy and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] The rapid development of industries such as automobiles and aerospace places higher requirements on the use of lightweight alloys and clean energy. Lightweight requirements make light metal alloys have a wide range of application prospects. The application of clean energy represented by hydrogen requires the development of Materials with high hydrogen storage performance. Compared with other alloy-based amorphous alloys, magnesium-based bulk amorphous alloys are light in weight and cheap in price. They are excellent candidates for alloys with high specific strength and high hydrogen storage performance, and have broad application prospects. At present, the research on magnesium-based bulk amorphous alloys mainly fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00
Inventor 李双寿彭浩黄天佑汤彬
Owner TSINGHUA UNIV
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