Reaction sintered ceramic bulletproof insert plate and preparation method of reaction sintered bulletproof ceramic

A technology of bulletproof inserts and sintered ceramics, which is applied in the field of inorganic non-metallic materials, can solve problems such as difficult removal, product performance degradation, and difficulty in residual silicon, so as to reduce labor intensity, facilitate industrialized large-scale production, and realize industrialized large-scale production Effect

Active Publication Date: 2016-01-06
ZHEJIANG LIGHT TOUGH COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the traditional reactive sintering process also has some limitations
Since the sintering process requires the reaction of infiltrated silicon and carbon, in order to ensure that the carbon in the green body fully participates in the reaction, the infiltrated silicon must exceed the theoretically calculated value, otherwise it will lead to underburning and residual carbon in the center of the green body, thereby reducing the performance of the product. Dropped significantly
Excess silicon is often deposited on the surface of sintered ceramics, forming a tight bond with the ceramics, which is very difficult to remove
Therefore, after using the traditional reaction sintering method to prepare ceramic pieces with special shapes, the residual silicon on the ceramic pieces is difficult to remove by conventional methods

Method used

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  • Reaction sintered ceramic bulletproof insert plate and preparation method of reaction sintered bulletproof ceramic
  • Reaction sintered ceramic bulletproof insert plate and preparation method of reaction sintered bulletproof ceramic
  • Reaction sintered ceramic bulletproof insert plate and preparation method of reaction sintered bulletproof ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Mix the raw materials whose mass composition is 90% of silicon carbide powder, 3% of carbon black powder, and 7% of polyvinyl alcohol, spray dry and granulate, and then press and form in a mold to obtain a silicon carbide compact, Such as figure 1 , figure 2 shown;

[0022] 2) After mixing the mass composition of 70% silicon powder, 5% silicon carbide powder and 25% boron nitride powder evenly, press and form in a mold to obtain a compact of sintered infiltration agent;

[0023] 3) Stack the silicon carbide compact and the infiltration agent compact together in a vacuum of 4×10 -1 In a Pa vacuum furnace, heat up to 1550°C for sintering and heat preservation for 1 hour to obtain reaction sintered silicon carbide;

[0024] 4) Tapping and removing the infiltrating agent residue on the surface of the sintered silicon carbide to obtain a reaction sintered silicon carbide ceramic chip.

[0025] Such as image 3 As shown, a bulletproof board made of reaction sintered ...

Embodiment 2

[0027] 1) After mixing the raw materials whose mass composition is 85% of boron carbide powder, 5% of carbon black powder, and 10% of paraffin wax solution, they are spray-dried and granulated, and then pressed into a mold to obtain a boron carbide compact;

[0028] 2) After mixing the mass composition of 65% silicon powder, 3% silicon carbide powder and 32% boron nitride powder evenly, press and form in a mold to obtain a compact of sintered infiltration agent;

[0029] 3) Stack boron carbide compacts and infiltration agent compacts together in a vacuum of 1×10 -1 In a Pa vacuum furnace, heat up to 1550°C for sintering and heat preservation for 1 hour to obtain reaction sintered boron carbide;

[0030] 4) Tapping and removing the infiltrating agent residue on the surface of the sintered boron carbide to obtain a reaction sintered boron carbide ceramic chip.

Embodiment 3

[0032] 1) After mixing the raw materials whose mass composition is 80% of silicon carbide powder, 10% of carbon black powder, and 10% of phenolic resin solution, they are spray-dried and granulated, and then pressed into a mold to obtain a silicon carbide compact;

[0033] 2) After mixing the mass composition of 70% silicon powder, 8% silicon carbide powder and 22% boron nitride powder evenly, press and form in a mold to obtain a compact of sintered infiltration agent;

[0034] 3) Stack the silicon carbide compact and the infiltration agent compact together in a vacuum of 3×10 -1 In a Pa vacuum furnace, heat up to 1650°C for sintering and heat preservation for 3 hours to obtain reaction sintered silicon carbide;

[0035] 4) Tapping and removing the infiltrating agent residue on the surface of the sintered silicon carbide to obtain a reaction sintered silicon carbide ceramic chip.

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Abstract

The invention discloses a reactive-sintered ceramic bulletproof plugboard and a method for preparing reactive-sintered bulletproof ceramics. The method sequentially comprises the following steps: uniformly mixing ceramic powder, carbon source powder and a forming agent with a ball mill, so as to obtain mixed powder, carrying out spray drying on the mixed powder, granulating, and then, carrying out press forming in a die, so as to obtain a ceramic pressed shape; uniformly mixing silicon powder, silicon carbide powder and boron nitride powder, and carrying out press forming in a die, so as to obtain an infiltration agent sintered pressed shape; stacking the ceramic pressed shape and the infiltration agent sintered pressed shape together, and carrying out reactive sintering in a vacuum environment, so as to obtain sintered ceramics; knocking to remove infiltration agent residues from the surface of the sintered ceramics, thereby obtaining a dense ceramic sheet. The bulletproof plugboard can be formed through splicing a plurality of ceramic sheets; through improving a special infiltration agent raw material formula, silicon remaining on the surface of a ceramic product during reactive sintering can be easily removed, the original morphology characteristics of ceramic biscuits are kept, and industrial large-scale production is easy to realize.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and relates to a preparation process of composite materials, in particular to a preparation method of a reaction sintered ceramic bulletproof insert and its product. Background technique [0002] Bulletproof materials are mainly used in the protection of specific parts of the human body, tanks, ships and aircraft during wartime. At present, human body protection mainly adopts the structural form of superimposing ceramic inserts on the soft body armor. The ceramic material that plays the main role of bulletproof must have high hardness, high elastic modulus and low density. The current ceramic bulletproof material is usually selected. Aluminum oxide, silicon carbide, boron carbide and silicon nitride, etc. [0003] Bulletproof ceramic boards can be divided into two types: spliced ​​boards and integral boards. The method of using the spliced ​​plate first needs to press and sinter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/563C04B35/65
Inventor 方宁象张国军张波张新龙
Owner ZHEJIANG LIGHT TOUGH COMPOSITE MATERIALS
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