Method for in-situ determination of kinetic curve of metallic glass ordering process by synchrotron radiation

A metallic glass and dynamics technology, applied in the use of wave/particle radiation for material analysis, measuring devices, scientific instruments, etc., can solve problems such as the inability to analyze microscopic mechanisms and atomic migration and diffusion laws

Active Publication Date: 2020-02-14
SHANDONG JIANZHU UNIV
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to change the traditional method of analyzing the kinetic characteristics of the metallic glass ordering process through thermal performance testing, and solve the problem that the traditional thermal analysis method cannot analyze the microscopic mechanism and the law of atomic migration and diffusion in the ordering process , through the combination of radiation analysis technology and numerical simulation, the atomic migration and diffusion process, the formation and growth mechanism of crystal nuclei, and the kinetic characteristics of ordering in the ordering process of metallic glasses are obtained, so as to characterize the metallic glass alloys. sequencing process

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  • Method for in-situ determination of kinetic curve of metallic glass ordering process by synchrotron radiation
  • Method for in-situ determination of kinetic curve of metallic glass ordering process by synchrotron radiation
  • Method for in-situ determination of kinetic curve of metallic glass ordering process by synchrotron radiation

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Experimental program
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Embodiment

[0028] The test adopts the atomic percentage as Zr 48 Cu 36 Al 8 be 8 amorphous alloys.

[0029] a. Select the nominal composition (atomic percentage) as Zr 48 Cu 36 Al 8 be 8 Metallic glass as the object, obtained Φ5×100mm bulk metallic glass alloy through vacuum arc melting (repeated smelting 5 times) and copper mold suction casting, and cut into alloy samples of Φ5×0.5mm;

[0030] b. Place the sample in the radiation path of synchrotron radiation (wavelength 0.01nm) for in-situ isothermal ordering treatment, the treatment temperature is 483°C, and the radiation data collection frequency is 3min;

[0031] c. Correct and convert the obtained radiation data to obtain the interference function I(Q) of the alloy, and see the attached part of the data figure 1 , and perform Fourier transform to obtain the reduced radial distribution function G(r) and radial distribution function RDF(r), etc.; calculate the nearest neighbor coordination number CN under different time condi...

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Abstract

The invention, which belongs to the technical field of nanocrystalline preparation, relates to a method for in-situ determination of a kinetic curve of a metallic glass ordering process by synchrotronradiation, thereby solving a problem of kinetic characteristics of the metallic glass ordering process. The method comprises the following steps: carrying out in-situ synchrotron radiation determination of metallic glass ordering; calculating atomic structure distribution; carrying out kinetic fitting of data; and performing ordered kinetic characteristic analysis. With the provided method, the kinetic characteristics of the ordering process can be measured and analyzed accurately and reliably to guide the production and preparation process of the nanocrystalline material, so that the purposeof practical industrialization is achieved.

Description

technical field [0001] The invention belongs to the technical field of nanocrystal preparation, belongs to the technical field of bulk metallic glass research, and relates to a technical method for characterizing the ordering characteristics of metallic glass, specifically measuring the kinetic curve of the ordering process of bulk metallic glass by using synchrotron radiation in situ method. Background technique [0002] Bulk metallic glass is a new generation of special metal materials with long-range disorder and short-range order structure. It has a series of excellent mechanical, physical and chemical properties unmatched by traditional crystalline alloy materials. It is widely used in machinery, communications, automobile industry and aviation. Aerospace and other fields have broad application prospects, and become a major research hotspot in the material and engineering circles in the 21st century. [0003] The ordering process of metallic glasses is usually achieved...

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Application Information

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IPC IPC(8): G01N23/00G01N25/20
CPCG01N23/00G01N25/20
Inventor 徐勇商雨新徐丽丽许超胡巧玲王静莹陈可欣牛楷至石磊
Owner SHANDONG JIANZHU UNIV
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