Method for preparing B4C-Al composite material

A composite material, b4c-al technology, applied in the field of preparing B4C-Al composite materials, can solve problems such as poor mechanical properties, achieve the effect of enhancing mechanical properties, reducing the degree of welding, and inhibiting excessive welding

Active Publication Date: 2011-06-15
ANHUI YINGLIU JIUYUAN NUCLEAR ENERGY NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the existing B 4 The mechanical property of C-Al composite material is relatively poor, can no

Method used

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  • Method for preparing B4C-Al composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Weigh the boron carbide powder and aluminum alloy powder of type 6061 according to the mass ratio of 15%:85%, and put them into a high-energy ball mill for cyclic variable speed ball milling. The speed is alternately changed between 300rpm and 600rpm, and each speed is ball milled for 300sec. (Denoted by 300rpm / 300sec~600rpm / 300sec, the same below), continuous ball milling for 3 hours, adding 2% stearic acid as a process control agent, the ratio of ball to material is 10:1, and the ball milling process is protected by argon. After ball milling, it is formed by unidirectional pressing, with a pressure of 30MPa, and the pressure is kept for 3 minutes; the compact is placed in a vacuum sintering furnace, and sintered at 550°C for 4h; the sintered sample is extruded at 430°C; Multiple times of hot rolling, each time the deformation is controlled within 5%, and finally a composite plate with a thickness of about 3mm is obtained.

Embodiment 2

[0027] Select the ball-to-material ratio as 15:1, add 0.5% zinc stearate as a process control agent, and ball mill for 8 hours; select the sintering temperature to be 600°C, the extrusion temperature to be 520°C, and the hot rolling temperature to be 430°C, and the rest of the conditions are the same as in the examples 1 to proceed.

Embodiment 3

[0029] The selected sintering temperature is 520°C, the extrusion temperature is 470°C, the hot rolling temperature is 450°C, and the rest of the conditions are the same as in Example 2.

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Abstract

The invention relates to a method for preparing a B4C-Al composite material, which is characterized by comprising the following steps of: 1, uniformly mixing a certain proportion of raw material boron carbide powder with aluminum alloy powder in a high-energy ball milling way; 2, compressing the uniformly-mixed power for molding; 3, sintering compression-molded compact in the step 2 at certain temperatures; 4, extruding sintered compact sintered in the step 3 at certain temperatures; and 5, conducting multiple-time hot rolling for the extruding-molded material in the step 4 at certain temperatures to obtain B4C-Al composite boards. By adopting the preparation method in the invention, the ball milling efficiency is high, the preparation process almost has no material loss, and the prepared B4C-Al composite boards have the characteristics of uniform distribution of boron carbide and good mechanical property and can be applied to neutron absorption/shielding.

Description

technical field [0001] The invention belongs to the field of composite material preparation, in particular to a method for preparing B 4 A method for C-Al composites. The material has potential applications in the field of neutron absorption / shielding. Background technique [0002] The nuclear fuel becomes spent fuel after being irradiated for a certain period of time in the reactor and must be unloaded from the reactor. The spent fuel discharged from the nuclear power plant reactor every year is about 1 / 4~1 / 3 of the total reactor charge. The discharged spent fuel is highly radioactive and continues to release heat. Measures need to be taken to manage it so that it does not pose a hazard to safety. [0003] Safe and efficient handling and disposal of spent fuel and its nuclear waste is critical to the sustainable development of nuclear power. With the successive construction and use of domestic nuclear power plants, the amount of spent fuel storage will increase, and the...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C21/00
Inventor 张玲沈春雷石建敏彭述明雷家荣龙兴贵周晓松
Owner ANHUI YINGLIU JIUYUAN NUCLEAR ENERGY NEW MATERIAL TECH CO LTD
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