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Synchrotron Radiation In Situ Measurement of Kinetic Curves of Metallic Glass Ordering Process

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 inability to analyze microscopic mechanisms and atomic migration and diffusion laws

Active Publication Date: 2022-03-04
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

Method used

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  • Synchrotron Radiation In Situ Measurement of Kinetic Curves of Metallic Glass Ordering Process
  • Synchrotron Radiation In Situ Measurement of Kinetic Curves of Metallic Glass Ordering Process
  • Synchrotron Radiation In Situ Measurement of Kinetic Curves of Metallic Glass Ordering Process

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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 method for measuring the kinetic curve of the ordering process of metallic glass in situ by synchrotron radiation belongs to the field of nanocrystal preparation technology, and mainly solves the problem of dynamic characteristics of the ordering process of metallic glass, including: in-situ synchrotron radiation of ordering metallic glass Determination; atomic structure distribution calculation; data dynamics fitting; ordered dynamics feature analysis. This method can accurately and reliably measure and analyze the kinetic characteristics of the ordering process, so as to guide the production and preparation process of nanocrystalline materials and achieve the purpose of practical industrialization.

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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Patent Type & Authority Patents(China)
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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