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Preparation method of boron carbide-based microstructure composite material

A technology of microstructure and composite materials, which is applied in the field of composite materials, can solve problems such as poor wetting effect of aluminum boron carbide and cracks in materials, and achieve the effect of avoiding sintering cracks and improving wettability

Active Publication Date: 2016-07-20
成都西顿硬质合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a boron carbide-based microstructure composite material for the above-mentioned prior art. Preparation method of structural composite material

Method used

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  • Preparation method of boron carbide-based microstructure composite material
  • Preparation method of boron carbide-based microstructure composite material
  • Preparation method of boron carbide-based microstructure composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 This embodiment is the preparation method of boron carbide-based microstructure composite material

[0036] Mix the boron carbide powder composed in Table 1 evenly, and the purity of boron carbide is higher than 98%; fill the boron carbide powder with a weight of 118g into the graphite mold cavity of D82mm×90mm, and then increase the density of the powder body by vibration to make carbonization The boron powder is evenly distributed.

[0037] Put a graphite plate (D75mm×5mm) with 4 small holes (D4mm~6mm) on the boron carbide powder body, and then put 100g of aluminum alloy (ZL102) to be infiltrated (the amount of aluminum alloy to be infiltrated is the target sample aluminum 1.3 times the theoretical ratio of the alloy) on the graphite plate, put them together into a vacuum furnace, and start sintering.

[0038] Table 1 Boron carbide particle size composition

[0039] Particle size range, micron

63～53

45～30

20～10

less than 10

...

Embodiment 2

[0043] Embodiment 2 This embodiment is the preparation method of boron carbide-based microstructure composite material

[0044] Mix the boron carbide powder composed of Table 2 evenly, and the purity of boron carbide is higher than 98%; fill the boron carbide powder with a weight of 118g into the graphite mold cavity of D82mm×90mm, and then increase the density of the powder body by vibration to make the boron carbide The powder is evenly distributed, and then a graphite plate (D75mm×5mm) with 4 small holes (D4mm~6mm) is placed on the boron carbide powder body, and then 100g of the aluminum alloy (ZL104) to be infiltrated (the aluminum alloy to be infiltrated The dosage is 1.4 times of the theoretical ratio of the target sample aluminum alloy) on the graphite plate, and they are put into a vacuum furnace together to start sintering.

[0045] Table 2. Boron carbide particle size composition

[0046] Particle size range, micron

63～53

45～30

20～10

less th...

Embodiment 3

[0050] The boron carbide powder mixes evenly (the particle size of boron carbide powder is composed with embodiment 1), and the purity of boron carbide is higher than 98%; The boron carbide powder that weight is 118g is filled in the graphite mold cavity of D82mm * 90mm, raises powder by vibration then The density of the body makes the boron carbide particles evenly distributed. Then put a graphite plate (D75mm×5mm) with 4 small holes (D4mm~6mm) on the boron carbide powder body, and then put 100g of aluminum alloy (ZL109) to be infiltrated (the amount of aluminum alloy to be infiltrated is about the target 1.3 times the theoretical ratio of the sample aluminum alloy) is placed on the graphite plate, and they are put into a vacuum furnace together to start sintering.

[0051] Before the sintering temperature rise starts, 100g of magnesium metal is placed in the heating zone of the vacuum furnace. The heating rate is 15°C / min~20°C / min, the temperature is raised to 1100°C~1150°C...

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Abstract

The invention relates to the technical field of composite materials, and specifically discloses a method for preparing a boron carbide-based microstructure composite material. Evenly distributed, the particle size distribution of boron carbide powder is 0.1 μm ~ 2000 μm; the graphite plate with small holes is covered on the boron carbide powder body; the aluminum alloy to be infiltrated is placed on the graphite plate and loaded into a vacuum furnace After sintering, the aluminum alloy enters the pores of the boron carbide powder through the pores of the graphite plate for infiltration to obtain a sintered body; after sintering is completed, the obtained sintered body is processed to remove the graphite plate. Further, magnesium metal is placed in the effective heating area of ​​the vacuum furnace before sintering. The method of the invention eliminates the possibility of microscopic cracks from the mechanism, avoids the occurrence of cracks in the boron carbide-based microstructure composite material, and effectively improves the wettability of aluminum.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a method for preparing a boron carbide-based microstructure composite material. Background technique [0002] Ceramics have the characteristics of high hardness, low density and resistance to chemical corrosion, but poor toughness. Aluminum alloy has the characteristics of good toughness and low density, but low hardness. If the three-dimensional microstructure composite of ceramics and aluminum alloy is carried out on the micron scale, the advantages of the two can be obtained to obtain a composite material with good comprehensive performance. Boron carbide (B 4 C) The characteristics of ceramics are obvious, and its hardness is only second to diamond and cubic boron nitride, and it is currently the third hardest material. In order to obtain materials with better comprehensive performance, people have explored and developed a three-dimensional microstructure compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10B22D23/04
Inventor 彭绍雨
Owner 成都西顿硬质合金有限公司
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