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Composite shielding material and preparation method thereof

A compound shielding and compound technology, which is applied in the field of composite shielding materials and its preparation, can solve problems such as poor anti-γ radiation performance, achieve the effects of controlling interface phase structure, avoiding harmful phase generation, and good neutron radiation shielding performance

Active Publication Date: 2013-04-17
SICHUAN INST OF MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Al-B 4 The anti-gamma radiation performance of C is poor, and the current Al-B 4 Most of C research focuses on Al-B 4 In terms of the preparation of C composite materials, there are few studies on the comprehensive shielding performance of neutron / γ radiation

Method used

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  • Composite shielding material and preparation method thereof
  • Composite shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh the raw material weight percentage WO 3 15%, B 4 C 15%, aluminum alloy 67%, Ti 3%; mix the various components according to the formula, put them into a stainless steel ball mill tank for ball milling, use YG8 hard alloy balls, and mill for 24 hours; put the powder after ball milling into soft The mold is formed by cold isostatic pressing, the cold isostatic pressing pressure is 250MPa, the temperature is 18°C, and the time is 10min. Put the cold-pressed billet into the package and seal it, then hot isostatic pressing sintering, the hot isostatic pressing gas is argon, the hot isostatic pressing temperature is 900°C, the hot isostatic pressing pressure is 120MPa, and the hot isostatic pressing holding time is 1h . The tungsten-containing B 4 C / Al composite shielding material.

Embodiment 2

[0026] Weigh the raw material weight percentage WO 3 25%, B 4 C 10%, Al 60%, TiO 2 5%; mix the constituent materials according to the formula, put them into a stainless steel ball mill tank for ball milling, use cemented carbide balls, and mill for 24 hours; put the powder after ball milling into a soft mold for cold isostatic pressing, cold isostatic pressing The pressure is 200MPa, the temperature is 25°C, and the time is 20min. Put the cold-pressed billet into the package and seal it, then hot isostatic pressing sintering, the hot isostatic pressing gas is argon, the hot isostatic pressing temperature is 800°C, the hot isostatic pressing pressure is 80MPa, and the hot isostatic pressing holding time is 3h . The tungsten-containing B 4 C / Al composite shielding material.

Embodiment 3

[0028] Weigh the raw material weight percentage WO 3 5%, B 4 C 20%, Al 72%, Cr3%; Mix the ingredients according to the formula, put them into a stainless steel ball mill tank for ball milling, use hard alloy balls, and the ball milling time is 22h; the powder after ball milling is put into a soft mold for cooling Isostatic pressing, the cold isostatic pressing pressure is 180MPa, the temperature is 20°C, and the time is 30min. Put the cold-pressed billet into the package and seal it, then hot isostatic pressing sintering, the hot isostatic pressing gas is argon, the hot isostatic pressing temperature is 680°C, the hot isostatic pressing pressure is 140MPa, and the hot isostatic pressing holding time is 1h . The tungsten-containing B 4 C / Al composite shielding material.

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Abstract

The invention relates to a composite shielding material and a preparation method thereof, in particular to the composite shielding material applied to nuclear radiation places such as nuclear reactor, spent fuel assembly storage and radioactive substance storage and transportation and the like. The composite shielding material is characterized by comprising the following components in percentage by weight: 0 to 30 percent of w and compound thereof, 0 to 70 percent of B4C, 0 to 90 percent of aluminum or aluminum alloy, 0 to 8 percent of other elements and the like. The composite shielding material comprising tungsten B4C / aluminum alloy is uniform in distribution of W2B5 and B4C, high in densification degree, high in strength and toughness, and particularly applicable to the field of neutron / gamma ray shielding.

Description

technical field [0001] The invention belongs to the field of composite shielding materials, and in particular relates to composite shielding materials used in nuclear radiation places such as nuclear reactors, storage of spent fuel components, storage and transportation of radioactive substances, and a preparation method thereof. [0002] Background technique [0003] Among the radiation generated in nuclear reactors, storage of spent fuel components, etc., the shielding issues that should be paid special attention to are neutron radiation and gamma radiation with strong penetrating power. The areas that produce neutron radiation are generally accompanied by gamma radiation. The radiation received by the equipment should be shielded from gamma rays while shielding neutron radiation. Generally, paraffin, polyethylene, polypropylene and other materials with high hydrogen content are excellent fast neutron moderator materials. Lithium fluoride, lithium bromide, lithium hydroxi...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/05G21F1/08
Inventor 张鹏程庞晓轩王伟
Owner SICHUAN INST OF MATERIALS & TECH
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