A Method for Characterizing the Ordering Process of Bulk Metallic Glasses Using In Situ Neutron Diffraction

A technology of metallic glass and neutrons, which is used in material analysis, instrumentation, and material thermal development using wave/particle radiation, and can solve problems such as inability to analyze microscopic and atomic migration and diffusion laws.

Active Publication Date: 2022-03-18
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 and atomic migration and diffusion laws in the ordering process, Through the combination of diffraction 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 during the ordering process of metallic glasses are obtained, so as to characterize the ordering of metallic glass alloys process

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  • A Method for Characterizing the Ordering Process of Bulk Metallic Glasses Using In Situ Neutron Diffraction
  • A Method for Characterizing the Ordering Process of Bulk Metallic Glasses Using In Situ Neutron Diffraction
  • A Method for Characterizing the Ordering Process of Bulk Metallic Glasses Using In Situ Neutron Diffraction

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Embodiment

[0028] The test adopts the atomic percentage as Zr 48 Cu 36 Al 8 Ag 8 metallic glass.

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

[0030] b. Place the sample in the neutron diffraction (wavelength 0.01nm) diffraction optical path for in-situ isothermal ordering treatment, the treatment temperature is 470°C, and the diffraction data collection frequency is 3min;

[0031] c. For the obtained diffraction data (see attached figure 1 , the picture is an example of in-situ neutron diffraction data with heat treatment time of 3min (a) and 54min (b) respectively) to correct and transform, obtain the interference function I(Q) of the alloy, and perform Fourier transform to obtain the reduced diameter Directional distribution f...

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Abstract

A method for characterizing the ordering process of bulk metallic glasses using in-situ neutron diffraction, including: in-situ neutron diffraction measurement of ordering of metallic glasses; calculation of atomic structure distribution; data dynamic fitting; ordering kinetic characteristics analyze. The present invention starts from the disorder-to-order transition of atomic stacking, combines the ordering process with macroscopic production and preparation conditions, accurately and reliably measures and analyzes the kinetic characteristics of the ordering process, and guides nanocrystalline The production and preparation process of materials achieves the purpose of practical industrialization.

Description

technical field [0001] The invention belongs to the technical field of nanocrystal preparation and the technical field of amorphous alloy research, and relates to a technical method for characterizing the ordering characteristics of metallic glasses, specifically a method for characterizing the ordering process of bulk metallic glasses by in-situ neutron diffraction. Background technique [0002] Compared with crystalline materials, bulk metallic glasses have a structure of long-range disorder and short-range order, and possess a unique series of excellent mechanical, physical and chemical properties, such as high strength, high hardness, great elastic limit at room temperature and Good formability in viscous state, etc., has broad application prospects in military, medical equipment, sports equipment and other fields. The ordering of metallic glasses is a promising process to obtain nanocrystalline structured materials, which largely expands the application potential and sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/207G01N25/20
CPCG01N23/2073G01N25/20
Inventor 徐勇叶佳硕商雨新徐丽丽王静莹陈可欣张君浩赵健宇符根源石磊
Owner SHANDONG JIANZHU UNIV
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