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B4C-SiC-Si composite material generated by siliconizing reaction of B4C/graphite preform, and preparation method of B4C-SiC-Si composite material

A technology of composite materials and prefabricated bodies, applied in the field of composite materials, can solve problems such as difficult large-scale production, high cost, product shape and size restrictions, etc.

Pending Publication Date: 2021-08-10
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, boron carbide / silicon carbide composite materials can be prepared by hot pressing sintering process, but the preparation cost of hot pressing sintering process is relatively high, the preparation process is relatively complicated, and the shape and size of the prepared products are limited, so it is difficult to realize industrial production. Difficult to achieve mass production

Method used

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  • B4C-SiC-Si composite material generated by siliconizing reaction of B4C/graphite preform, and preparation method of B4C-SiC-Si composite material
  • B4C-SiC-Si composite material generated by siliconizing reaction of B4C/graphite preform, and preparation method of B4C-SiC-Si composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] B 4 C / graphite preform siliconizing reaction to generate B 4 C-SiC-Si composite material, by weight, includes the following components:

[0028] 90 parts of boron carbide ceramic powder; 10 parts of graphite powder; 7 parts of phenolic resin binder; 110 parts of silicon powder.

[0029] The boron carbide ceramic powder is micron-sized, and the particle size of the powder is 3 μm;

[0030] The graphite powder is micron-sized, and the powder particle size is 10 μm;

Embodiment 2

[0032] B 4 C / graphite preform siliconizing reaction to generate B 4 C-SiC-Si composite material, including the following components:

[0033] 60 parts of boron carbide ceramic powder; 40 parts of graphite powder; 10 parts of phenolic resin binder; 150 parts of silicon powder.

[0034] The boron carbide ceramic powder is micron-sized, and the particle size of the powder is 5 μm;

[0035] The graphite powder is of micron scale, and the particle size of the powder is 15 μm.

Embodiment 3

[0037] B 4 C / graphite preform siliconizing reaction to generate B 4 The C-SiC-Si composite material is characterized in that it comprises the following components:

[0038] 70 parts of boron carbide ceramic powder; 30 parts of graphite powder; 8 parts of phenolic resin binder; 130 parts of silicon powder.

[0039] The boron carbide ceramic powder is micron-sized, and the particle size of the powder is 4 μm;

[0040] The graphite powder is of micron scale, and the particle size of the powder is 13 μm.

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Abstract

A B4C-SiC-Si composite material generated by a siliconizing reaction of aB4C / graphite preform comprises the following components: boron carbide ceramic powder; graphite powder; a phenolic resin binder; and silicon powder. A preparation method of the composite material comprises the following steps: step 1, mixing the boron carbide ceramic powder and the graphite powder into a mixed material; step 2, loading the mixed material into a ball milling tank, adding absolute ethyl alcohol and agate grinding balls, carrying out ball milling to obtain slurry, and drying to obtain a B4C / graphite composite powder; step 3, adding the phenolic resin binder, absolute ethyl alcohol and the agate grinding balls into the B4C / graphite composite powder, performing wet ball milling and mixing in a ball milling tank to prepare slurry, and drying to prepare B4C / graphite mixed powder; step 4, loading the B4C / graphite mixed powder obtained in the step 3 into a steel mold, and drying the B4C / graphite mixed powder to obtain a strip-shaped sample prefabricated blank; and step 5, putting the strip-shaped sample prefabricated blank into a graphite crucible, covering the surface of the strip-shaped sample prefabricated blank with coarse silicon powder, and performing high-temperature siliconizing to obtain the B4C-SiC-Si composite material. The composite material has the characteristics of high hardness, wear resistance, high-temperature oxidation resistance, simple preparation process and low cost.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to B 4 C / graphite preform siliconizing reaction to generate B 4 C-SiC-Si composite material and its preparation method. Background technique [0002] Boron carbide ceramic material has high strength, high toughness, high melting point, high hardness and good wear resistance, corrosion resistance and high temperature oxidation resistance, and is widely used in engineering fields. Boron carbide ceramic materials are widely used in the engineering field due to their high strength and high hardness, good wear resistance and good high temperature oxidation resistance. Silicon carbide ceramics have high strength, high toughness, high hardness, good wear resistance and high temperature oxidation resistance. Therefore, boron carbide ceramic materials and silicon carbide materials can be combined to prepare boron carbide / silicon carbide composite materials. Boron carbide / sili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563C04B35/65
CPCC04B35/563C04B35/65C04B2235/3826C04B2235/428C04B2235/425C04B2235/6581C04B2235/77
Inventor 江涛韩慢慢付甲
Owner XI'AN PETROLEUM UNIVERSITY
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