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High-toughness laminar bulletproof ceramic material and preparation method combining tape casting method with hot-pressing sintering method

A technology of ceramic materials and layered materials, which is applied in the field of preparation of ceramic composite materials, can solve the problems of debonding and cracking of china, the toughness of layered ceramics, the small improvement of strength and impact resistance, and the long process cycle, so as to improve the resistance to Impact properties, improved damage tolerance, and improved fabrication efficiency

Inactive Publication Date: 2019-08-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the long process cycle of gel injection molding, low efficiency, poor controllability of interface thickness, and problems such as deglue cracking and delamination of the green body, the designability of its stru

Method used

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  • High-toughness laminar bulletproof ceramic material and preparation method combining tape casting method with hot-pressing sintering method
  • High-toughness laminar bulletproof ceramic material and preparation method combining tape casting method with hot-pressing sintering method
  • High-toughness laminar bulletproof ceramic material and preparation method combining tape casting method with hot-pressing sintering method

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Experimental program
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preparation example Construction

[0044] (3) Preparation of ceramic green body: the layered ceramic preform is molded and pressed at a certain pressure and temperature to prepare a ceramic green body;

[0045] Put the preform into a flat vulcanizer at 100-200°C and keep it warm for 1-3h under a pressure of 10-30MPa to obtain a layered ceramic preform;

[0046] (4) Preparation of high-toughness layered bulletproof ceramics with programmable layer thickness ratio and interface:

[0047] Place the graphite mold with the ceramic biscuit in a hot press furnace, raise the temperature to 1750°C-2050°C at a rate of 10-20°C / min, keep it warm for 1-2h, sintering pressure 20-40MPa, sintering atmosphere Ar or vacuum, After cooling down to room temperature with the furnace, a high-toughness layered bulletproof ceramic is prepared.

[0048] The layered bulletproof ceramics are prepared by hot pressing and sintering under different sintering temperatures, pressures, and atmospheres after debinding the ceramic green body. Am...

Embodiment 1

[0058] as attached figure 1 , 2 , 3, 4, 5, a kind of tape-casting method of the present invention combines the method for hot-pressing sintering method to prepare high-toughness layered bulletproof ceramic material, and this method comprises the following steps:

[0059] (1), the preparation of ceramic sheet, concrete steps are as follows:

[0060] ① Thick layer: combine 40kg SiC powder and 1.6gY 2 o 3 with 2.4g Al 2 o 3 Powder mixed powder, 47kg of ethanol mixed solution, 2kg of triethyl phosphate was added to the nodular ink tank and mixed for 24 hours to obtain a premixed solution; the particle size of the powder was 0.5 μm;

[0061] Thin layer: 20Kg BN powder, 20Kg SiC powder and 1.6gY 2 o 3 with 2.4g Al 2 o 3 Powder mixed powder, 47kg of ethanol mixed solution, 2kg of triethyl phosphate was added to the nodular ink tank and mixed for 24 hours to obtain a premixed solution; the particle size of the powder was 0.5 μm;

[0062] ②. Add 5kg of polyvinyl butyral, 2kg ...

Embodiment 2

[0072] as attached Figure 6 , 7 Shown, a kind of tape-casting method of the present invention combines the method for hot-pressing sintering method to prepare high-toughness layered bulletproof ceramic material, and this method comprises the following steps:

[0073] (1), the preparation of cast sheet, concrete steps are as follows:

[0074] ① Thick layer: Mix 45.6kg of SiC powder, 0.96Kg of B powder and 1.44Kg of C powder, add 40kg of ethanol mixture, and 2kg of triethyl phosphate into the ball ink tank and mix for 24 hours to obtain a premixed solution; The particle size is 0.5μm;

[0075]Thin layer: 22.8Kg BN powder, 22.8Kg SiC powder, 0.96Kg B powder and 1.44Kg C powder mixed powder, 40kg ethanol mixed solution, 2kg triethyl phosphate were added to the ball ink tank and mixed for 24 hours to obtain the premixed solution; The particle size of the powder is 0.5μm;

[0076] Thin layer: 22.8Kg B 4 C powder, 22.8Kg SiC powder, 0.96Kg B powder and 1.44Kg C powder mixed pow...

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Abstract

The invention relates to a high-toughness laminar bulletproof ceramic material and a preparation method combining a tape casting method with a hot-pressing sintering method. The preparation method comprises the following steps: (1) preparation of ceramic slices: carrying out tape casting on slurry, and carrying out drying, demoulding and cutting; (2) structural design: laminating the ceramic slices with different components according to a certain layer thickness ratio and sequence; (3) preparation of ceramic biscuits: carrying out compression molding at certain pressure and temperature; and (4) hot-pressing sintering preparation of the high-toughness laminar bulletproof ceramic material. According to the high-toughness laminar bulletproof ceramic material prepared by combining the tape casting method with the hot-pressing sintering method, damage tolerance of the material is improved by utilizing crack deflection toughening of a weak binding interface and residual stress toughening ofa strong bonding interface, and then impact resistance is greatly improved by combining the wave impedance matching design of the laminar structure. Meanwhile, structural designability of the preparation method combining the tape casting method with the hot-pressing sintering method provides possibility for manufacturing of various bulletproof armors.

Description

technical field [0001] The invention belongs to a preparation method of a ceramic composite material, and relates to a high-toughness layered bulletproof ceramic material and a preparation method of a tape-casting method combined with a hot-pressing sintering method, in particular to a method of combining a tape-casting method and a hot-pressing sintering method to prepare high-strength and high-toughness materials. A method for layered bulletproof ceramic materials. Background technique [0002] Boron carbide, silicon carbide, silicon nitride, and titanium diboride ceramics have the advantages of high hardness, high temperature resistance, and high modulus, and are widely used in the field of high-speed impact resistance. However, low toughness and low damage tolerance make these materials It is extremely prone to brittle fracture under high-speed impact, and it is difficult to resist multiple impacts. The structural designability of layered ceramics enables them to have h...

Claims

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Application Information

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IPC IPC(8): C04B37/00C04B35/565C04B35/583C04B35/645
CPCC04B35/565C04B35/583C04B35/645C04B37/00C04B2235/3217C04B2235/3225C04B2235/421C04B2235/422C04B2235/6025C04B2235/658C04B2237/36C04B2237/361C04B2237/365
Inventor 成来飞孙孟勇张亚妮白钰航
Owner NORTHWESTERN POLYTECHNICAL UNIV
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