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Vanadium-based neutron transparent material for neutron diffraction high-pressure cavity and preparation method thereof

A technology of transparent materials and high-pressure chambers, which is applied in the field of neutron diffraction, can solve problems such as weak noise signals, and achieve the effects of increasing pressure, excellent high coherent scattering transparency, and prolonging service life

Inactive Publication Date: 2016-07-20
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Prior art 1 and 2 are also considered and referred to by the applicant in the research and development and experiments of the technical solution of the present application, but there are still weak noise signals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The content of vanadium in the neutron transparent material is 85wt%, and the content of chromium is 15wt%. Mix vanadium powder and chromium powder according to the stated ratio, mix them uniformly by ball milling, and press the steel mold to obtain a green compact. Put the compact into a vacuum furnace for sintering, and sinter at a temperature of 1750°C for 3 hours to obtain neutron diffraction Vanadium-based neutron-transparent materials for high-pressure chambers.

Embodiment 2

[0022] The content of vanadium in the neutron transparent material is 86wt%, and the content of chromium is 12wt%. Mix vanadium powder and chromium powder according to the stated ratio, mix them uniformly by ball milling, and press the steel mold to obtain a green compact. Put the compact into a vacuum furnace for sintering, and sinter at a temperature of 1770°C for 3 hours to obtain neutron diffraction Vanadium-based neutron-transparent materials for high-pressure chambers.

Embodiment 3

[0024] The content of vanadium in the neutron transparent material is 87wt%, and the content of chromium is 13wt%. Mix vanadium powder and chromium powder according to the stated proportions, mix them evenly by ball milling, and form them by cold isostatic pressing to obtain compacts, which are then sintered in a vacuum furnace for 2.5 hours at a temperature of 1780°C to obtain medium Vanadium-based neutron-transparent materials for sub-diffraction high-pressure chambers.

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PUM

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Abstract

The invention belongs to the technical field of neutron diffraction, and relates to a neutron transparent material for a neutron diffraction high-pressure cavity sealing pad and a preparation method thereof. The neutron transparent material comprises 85 wt%-95 wt% of vanadium, the main base material in the neutron transparent material, and the balance chrome. Compared with an existing Ti-Zr alloy sealing pad, the high-pressure cavity sealing pad material is high in strength and capable of improving the pressure of a high-pressure cavity; the neutron transmittance and the neutron diffraction performance of the high-pressure cavity sealing pad material are equivalent to those of Ti-Zr alloy, but the adhesion of the high-pressure cavity sealing pad material to diamond is very low; and a diamond anvil cell is easy to clean after a high-pressure experiment, the service life of the diamond anvil cell can be prolonged, and the high-pressure experiment cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of neutron diffraction, and in particular relates to a vanadium-based neutron transparent material used as an alloy material for a gasket of a high-pressure chamber of neutron diffraction and a preparation method thereof. Background technique [0002] High-pressure science has developed into a new dimension of material science, providing unprecedented opportunities for cutting-edge scientific explorations such as exploring new substances, discovering new laws and new theories. Although neutron diffraction is extremely important in studying the properties of materials at high pressure, however, this technique has lagged far behind other high-pressure techniques, such as synchrotron radiation high-pressure technology. The gasket of the high-pressure chamber is used to fix the sample and increase the confining pressure. At the same time, the incident (or outgoing) light diffracted by neutrons will pass through ...

Claims

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Application Information

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IPC IPC(8): C22C27/02C22C1/04
CPCC22C27/025C22C1/045
Inventor 林涛金钟铃邵慧萍吴朝圣何新波毕延吴强侯琪玥谢鸿森徐济安
Owner UNIV OF SCI & TECH BEIJING
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