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a b 4 c/tib 2 Preparation method of layered composite ceramic material

A ceramic material, layered composite technology, applied in the field of materials, to achieve the effects of excellent comprehensive mechanical properties, simple steps, and low temperature requirements

Active Publication Date: 2021-01-08
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For existing B 4 C / TiB 2 The problem that layered composite ceramic material preparation method exists, the invention provides a kind of B 4 C / TiB 2 The preparation method of layered composite ceramic material, with B 4 C. TiB 2 , Si and phenolic resin as raw materials, after one-way molding with layer-by-layer filler, and then carry out pressureless vacuum silicon infiltration, under the condition of low sintering temperature and no deformation in the sintering process, it has high density and comprehensive mechanical properties. Better B 4 C / TiB 2 Layered composite ceramic materials

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  • a b <sub>4</sub> c/tib <sub>2</sub> Preparation method of layered composite ceramic material
  • a b <sub>4</sub> c/tib <sub>2</sub> Preparation method of layered composite ceramic material
  • a b <sub>4</sub> c/tib <sub>2</sub> Preparation method of layered composite ceramic material

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Embodiment 1

[0037] The ratio of 14% 3.5μm, 43% 10μm, 14% 20μm, 29% 45μm B 4 C powder is evenly mixed with carbon source and absolute ethanol, and the mixing ratio is that the carbon content accounts for B 4 9.9% of the total weight of C powder, the ratio is 70% 104μm, 15% 25μm, 15% 104μm TiB 2 Mix the powder with carbon source and absolute ethanol evenly, the mixing ratio is carbon content to TiB 2 17.6% of the total weight of the powder, the two mixtures were fully dried to remove absolute ethanol, then ground and granulated, and then sieved, and the part with a particle size of 24 to 60 mesh was selected as the molding material. First, an appropriate amount of B 4 Put the C / C mixture into the mold, compact it under the pressure of 50MPa, and then add an appropriate amount of TiB 2 / C mixed material is put into the mold, and molded under the pressure of 200MPa. After forming, the thickness of the two layers of mixed material is the same, and then carbonized at 700°C for 3 hours under v...

Embodiment 2

[0044] The ratio of 14% 3.5μm, 43% 10μm, 14% 20μm, 29% 45μm B 4 C powder is evenly mixed with carbon source and absolute ethanol, and the mixing ratio is that the carbon content accounts for B 4 9.9% of the total weight of C powder; the ratio is 70% 104μm, 15% 25μm, 15% 104μm TiB 2 Mix the powder with carbon source and absolute ethanol evenly, the mixing ratio is carbon content to TiB 2 17.6% of the total weight of the powder; B with a particle size of 3.5 μm 4 C powder and 5 μm TiB 2 The powder is mixed evenly with carbon source and absolute ethanol, and the mixing ratio is that the carbon content accounts for B 4 C powder and TiB 2 13.6% of the total weight of the powder, of which B 4 C powder and TiB 2 The weight ratio of powder is 1:1. The three mixtures are fully dried to remove absolute ethanol, then ground and granulated, and then sieved, and the part with a particle size of 24-60 mesh is selected as the molding material. First, an appropriate amount of B 4 Put ...

Embodiment 3

[0050] B with a particle size of 3.5 μm 4 C powder is evenly mixed with carbon source and absolute ethanol, and the mixing ratio is that the carbon content accounts for B 4 9.9% of the total weight of C powder, TiB with a particle size of 5 μm 2 Mix the powder with carbon source and absolute ethanol evenly, the mixing ratio is carbon content to TiB 2 17.6% of the total weight of the powder, the two mixtures are fully dried to remove absolute ethanol, then ground and granulated, and then sieved, and the part with a particle size of 24 to 60 mesh is selected as the molding material. First, an appropriate amount of B 4Put the C / C mixture into the mold, compact it under the pressure of 50MPa, and then add an appropriate amount of TiB 2 / C mixed material is put into the mold, and molded under the pressure of 200MPa. After forming, the thickness of the two layers of mixed material is the same, and then carbonized at 700°C for 3 hours under vacuum conditions to obtain B 4 C / C-TiB ...

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Abstract

The invention belongs to the field of material technology and provides a B 4 C / TiB 2 The preparation method of layered composite ceramic materials is carried out according to the following steps: (1) Put B 4 C powder, TiB 2 Powder or B 4 C / TiB 2 The mixed powder is evenly mixed with the carbon source in proportion, fully dried, ground and granulated, and then sieved to select particles with a particle size between 24 and 60 mesh as molding materials; (2) The molding materials are layered layer by layer according to the target layered structure. Fill the mold for compression molding, and obtain B after carbonization. 4 C / TiB 2 / C layered blank; (3) Place B 4 C / TiB 2 / C layered blank is used as the skeleton, Si is used as the infiltration agent, and vacuum infiltration is performed to obtain B 4 C / TiB 2 Layered composite ceramic materials. The method of the present invention has simple steps and low temperature requirements, and can obtain B with high density and excellent comprehensive mechanical properties under the condition of low preparation cost. 4 C / TiB 2 For layered composite ceramic materials, the size change of the sample during the preparation process is <0.1%, which belongs to net size sintering; and the method of the present invention can produce various products with complex shapes.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a B 4 C / TiB 2 A method for preparing a layered composite ceramic material. Background technique [0002] Boron carbide (B 4 C) Ceramics have the advantages of low density, superhardness, high melting point, and chemical corrosion resistance. Titanium boride (TiB 2 ) Ceramics have the advantages of high hardness, high elastic modulus, high wear resistance, good thermal and electrical conductivity, and good chemical stability. 4 C and TiB 2 The combined layered composite ceramic material imitates the shell structure of shells and other organisms in nature, and uses the energy dissipation toughening mechanism to greatly improve the fracture toughness of single-layer ceramic materials, while ensuring the B 4 C ceramic and TiB 2 The high hardness and high strength of ceramics can be better used in industries such as military industry, machinery and aerospace. [0003] The cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/563C04B35/573C04B35/58C04B35/622
CPCC04B35/563C04B35/573C04B35/58071C04B35/622C04B2235/428C04B2235/48C04B2235/5436C04B2235/612C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96
Inventor 张翠萍茹红强尤田张金东夏乾
Owner NORTHEASTERN UNIV LIAONING
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