Unlock instant, AI-driven research and patent intelligence for your innovation.

Boron-containing particle enhanced tungsten-aluminum alloy composite shielding material and preparation method thereof

A tungsten-aluminum alloy and composite shielding technology, which is applied in the field of nuclear radiation protection composite materials, can solve problems such as huge difference in melting point and density, high sintering temperature, difficult tungsten-aluminum alloy, etc., and achieve good shielding effect, high density, and good toughness Effect

Inactive Publication Date: 2020-11-10
HARBIN INST OF TECH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on tungsten-aluminum alloy materials at home and abroad mostly adopts hot pressing process, hot isostatic pressing process and smelting casting method, which have the problems of high sintering temperature (above 1200°C) and long sintering time (1~4h). The solid solubility between them is very small, and the melting point and density differ greatly, so it is difficult to obtain tungsten-aluminum alloy by melting method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Boron-containing particle enhanced tungsten-aluminum alloy composite shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 87% pure tungsten powder, 12% pure aluminum powder and 0.5% stearic acid according to the mass fraction and put them into a ball mill jar for ball milling. Argon gas is poured into the ball mill jar as a protective atmosphere, and the ball-to-material ratio is 10: 1. The ball milling speed is 300r / min, and the ball milling time is 70 hours to obtain tungsten aluminum alloy powder.

[0037]Put the obtained tungsten-aluminum alloy powder and boron powder with a mass fraction of 0.5% into a ball mill jar, and ball mill for 1 hour under the condition of 100 r / min to obtain a mixed powder. The mixed powder was sieved with a 20-mesh sieve, then put into a vacuum drying oven, and dried at 100° C. for 1 hour to obtain a dried mixed powder. Then put the dry mixed powder into a graphite mold, apply a pressure of 15 MPa, and press it into a biscuit. Put the biscuit and the graphite mold together into the discharge plasma sintering furnace, evacuate the furnace, apply a pres...

Embodiment 2

[0039] Weigh 78% pure tungsten powder, 20% pure aluminum powder and 1.5% stearic acid according to the mass fraction and put them into a ball mill jar for ball milling. Argon gas is poured into the ball mill jar as a protective atmosphere. The ball-to-material ratio is 15: 1. The ball milling speed is 200r / min, and the ball milling time is 70 hours to obtain tungsten-aluminum alloy powder. Put the obtained tungsten-aluminum alloy powder and boron powder with a mass fraction of 0.5% into a ball mill jar, and ball mill for 1 hour under the condition of 140 r / min to obtain a mixed powder.

[0040] The mixed powder was sieved with a 100-mesh sieve, then put into a vacuum drying oven, and dried at 50° C. for 2 hours to obtain a dried mixed powder. Then put the dry mixed powder into a graphite mold, apply a pressure of 5 MPa, and press it into a biscuit. Put the biscuit and the graphite mold together into the discharge plasma sintering furnace, evacuate the furnace, apply a pressur...

Embodiment 3

[0042] Weigh 99% pure tungsten powder, 0.8% pure aluminum powder and 0.1% stearic acid according to the mass fraction and put them into a ball mill jar for ball milling. Argon gas is poured into the ball mill jar as a protective atmosphere, and the ball-to-material ratio is 5: 1. The ball milling speed is 250r / min, and the ball milling time is 70 hours to obtain tungsten-aluminum alloy powder. Put the obtained tungsten-aluminum alloy powder and boron powder with a mass fraction of 0.1% into a ball mill jar, and ball mill for 1 hour under the condition of 100 r / min to obtain a mixed powder.

[0043] The mixed powder was sieved with an 80-mesh sieve, then put into a vacuum drying oven, and dried at 60° C. for 4 hours to obtain a dried mixed powder. Then put the dry mixed powder into a graphite mold, apply a pressure of 20 MPa, and press it into a biscuit. Put the biscuit and the graphite mold together into the discharge plasma sintering furnace, evacuate the furnace, apply a pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a boron-containing particle enhanced tungsten-aluminum alloy composite shielding material. The composite shielding material is prepared with boron particles, pure tungsten powder and pure aluminum powder. The mass fraction of the boron-containing particles is 0.1%-35%, the mass fraction of the pure tungsten powder is 27%-99%, and the mass fraction of the pure aluminum powder is 0.1%-56%. The boron-containing particles are a mixture of one or more of elemental boron, boron carbide or boron nitride containing 10B isotopes. According to the prepared boron-containing particle enhanced tungsten-aluminum alloy composite shielding material, comprehensive shielding performance to neutrons and gamma rays can be achieved, and the material has good mechanical strength and ductility and excellent high-temperature-resisting performance and anti-oxidant performance. The boron-containing particles are adopted as a neutron absorber, the 10B isotope content is high, the neutronabsorption cross section is large, and the good shielding effect on the thermal neutrons is achieved.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation protection composite materials, and in particular relates to a boron-containing particle-reinforced tungsten-aluminum alloy composite shielding material and a preparation method thereof. Background technique [0002] With the continuous increase of nuclear power generation in my country, the storage and transportation of spent fuel and nuclear waste has gradually received attention. A megawatt nuclear power plant has to discharge nearly 25 tons of spent fuel every year. By 2020, the total amount of spent fuel will reach 7,500-10,000 tons. Therefore, research on nuclear shielding materials has important engineering application prospects and value. [0003] Spent fuel has strong radioactivity, among which neutrons and gamma rays have high energy and strong penetrating ability, which will not only endanger human health, but also cause serious pollution to the surrounding environment, so the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C27/04C22C21/00C22C30/00C22C32/00C22C1/05C22C1/10
CPCC22C1/0416C22C1/045C22C1/05C22C21/00C22C27/04C22C30/00C22C32/0047
Inventor 乔菁张泉高晓洒武高辉杨文澍陈国钦
Owner HARBIN INST OF TECH