Rare earth-based bulk metallic glass with adjustable rear earth ingredient content

A bulk metal, rare earth-based technology, applied in the field of rare earth-based bulk metallic glass, can solve the problems of increasing the difficulty of preparing rare-earth-based bulk metallic glass and the difficulty of maintaining a specific ratio of rare earth elements, so as to reduce the difficulty of preparation and reduce the cost of preparation , excellent performance

Inactive Publication Date: 2013-09-11
UNIV OF JINAN
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Because rare earth elements are extremely easy to oxidize, it is difficult to maintain a specific ratio of rare earth elements; thus increasing the difficulty of preparing rare earth-based bulk metallic glasses

Method used

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  • Rare earth-based bulk metallic glass with adjustable rear earth ingredient content
  • Rare earth-based bulk metallic glass with adjustable rear earth ingredient content
  • Rare earth-based bulk metallic glass with adjustable rear earth ingredient content

Examples

Experimental program
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Effect test

Embodiment 1-12

[0027] Table 1

[0028]

[0029] Take the metal raw material according to the atomic percentage in the different embodiments of Table 1: cerium , lanthanum , praseodymium , samarium , gadolinium , cobalt and aluminum (purity ≥ 99.5%), a total of 50g. Put the metal raw material in a copper mold cooled by circulating water, pass in 0.6MPa argon gas under vacuum conditions, and adjust the distance between the tungsten electrode and the metal raw material to be 1cm under the voltage of 380V; turn on the power, start the arc ; Repeated melting 3 times to ensure that the alloy components are evenly mixed to obtain an alloy master ingot. The obtained alloy master ingot is put into an electric arc furnace for re-melting, and at the same time, the suction casting valve is opened, and the pressure difference is controlled at 0.4 MPa for suction casting to obtain a rare earth-based bulk metallic glass with adjustable rare earth component content.

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Abstract

The invention relates to rare earth-based bulk metallic glass with adjustable rear earth ingredient content, belonging to the preparation field of bulk metallic glass. The rare earth-based bulk metallic glass with adjustable rear earth ingredient content provided by the invention is composed of Re65Co25Al10, wherein Re refers to CexLayPrzSmsGdt, x is not smaller than 13% while not larger than 30%, y is not smaller than 13% while not larger than 22%, z is not smaller than 4% while not larger than 13%, s is not smaller than 6% while not larger than 13%, t is not smaller than 4% while not larger than 13%, and the sum of x, y, z, s, t is 65%. The bulk metallic glass can be prepared only if proportions of the rear earth elements are randomly adjusted within the range provided by the invention; therefore, the problem that an amorphous state cannot be formed in the preparation process due to slight change of content of one rear earth element is eliminated, thereby reducing the preparation difficulty. More La and Ce with cheap price can be added when preparing the rare earth-based bulk metallic glass so as to effectively reduce the preparation cost of alloy.

Description

technical field [0001] The invention relates to a rare earth-based block metallic glass with adjustable rare earth component content, and belongs to the field of block metallic glass preparation. Background technique [0002] Amorphous alloys, also known as metallic glasses, have metastable structural characteristics of short-range order and long-range disorder. In the solid state, the three-dimensional space of its atoms is topologically disordered, and this state remains relatively stable within a certain temperature range. Compared with crystalline alloys, amorphous alloys have many excellent properties such as high hardness, high strength, high electrical resistance, corrosion resistance and wear resistance, and have attracted much attention and have broad application prospects. [0003] Akihisa Inoue, a Japanese scholar, proposed three empirical rules for obtaining alloys with large amorphous forming ability and wide supercooled liquid phase region: (1) the alloy is co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C1/03
Inventor 王艳郑州邢祁固有地
Owner UNIV OF JINAN
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