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Preparation method of reinforced ceramic three-dimensional constraint coating

A three-dimensional, coating technology, applied in coating, metal material coating process, melt spraying and other directions, can solve problems such as insufficient rigidity constraints, ceramic micro-cracks, broken, etc., to increase the crack expansion area and prevent crack expansion. , the effect of high bonding strength

Pending Publication Date: 2020-04-24
中航装甲科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional ceramic restraint is mainly composed of the face plate, the side plate and the back plate, and the material is armor steel, but this method cannot well restrain the expansion of cracks inside the ceramic
Microscopically, the solid surface is composed of many asperities, and the contact between solids only depends on the contact of several asperities, so it is difficult to effectively control the crack propagation; secondly, the hardness of armor steel, especially the dynamic hardness, is much lower than that of ceramics, resulting in Insufficient rigid restraint makes the restrained ceramics shatter after being shot
The Chinese patent "Porous Metal Encapsulated Ceramic Composite Protective Plate and Its Preparation Method" (publication number: CN102774075A) provides a three-dimensional confinement method for ceramics. In this method, the ceramic core plate and mixed powder are placed in a mold for compression molding. For Brittle ceramics, which may cause microcracks or fractures in the ceramic, affecting its protective performance

Method used

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  • Preparation method of reinforced ceramic three-dimensional constraint coating
  • Preparation method of reinforced ceramic three-dimensional constraint coating
  • Preparation method of reinforced ceramic three-dimensional constraint coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] B 4 Surface C is sandblasted, the blasting pressure is 0.5MPa, the sand grain is brown corundum, and the grain size is 60 mesh. The blasting distance is 25cm, the blasting angle is 60°, and the blasting time is 5s. After sandblasting, the surface of the ceramics is cleaned with compressed air and the surface is cleaned with ultrasonic, and then dried with a hair dryer. Weigh 250g of Ti powder, place it in a blast drying oven at 120°C for 2h, take it out, and wait for spraying. The plasma spraying process parameters are: spraying current is 500A, spraying voltage is 70V, spraying distance is 100mm.

[0045] The preparation method of this embodiment is used to study the influence of the powder particle size of the spraying raw materials on the bonding strength and porosity of the coating, and Ti powder is divided into 4 groups according to the particle size, as shown in Table 1.

[0046] Table 1 Ti powder particle size

[0047] Group Particle size / μm Experimental group ...

Embodiment 2

[0050] Al 2 O 3 The surface is sandblasted, the blasting pressure is 0.6MPa, the sand grain is brown corundum, and the grain size is 70 mesh. The blasting distance is 20cm, the blasting angle is 90°, and the blasting time is 8s. After sandblasting, the surface of the ceramics is cleaned with compressed air and the surface is cleaned with ultrasonic, and then dried with a hair dryer. Weigh 250g of AT40 powder, put it in a blast drying oven at 120°C for 2h, take it out, and wait for spraying. The plasma spraying process parameters are: spraying current is 500A, spraying voltage is 65V, spraying distance is 100mm. Such as image 3 As shown, the scanning electron microscope image of the sprayed product at 300μm.

Embodiment 3

[0052] The SiC surface is sandblasted, the blasting pressure is 0.5MPa, the sand grain is brown corundum, and the grain size is 80 mesh. The blasting distance is 30cm, the blasting angle is 45°, and the blasting time is 10s. After sandblasting, the surface of the ceramics is cleaned with compressed air and the surface is cleaned with ultrasonic, and then dried with a hair dryer. Weigh 250g of WC-Co powder, put it in a blast drying oven at 120°C for 2h, take it out, and wait for spraying. The process parameters of supersonic flame spraying are: gas (C 2 H 2 ) The flow rate is 25L / min, the oxygen flow rate is 200L / min, and the spraying distance is 270mm. Such as Figure 4 As shown, the scanning electron microscope image of the sprayed product under 100μm.

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Abstract

The invention provides a preparation method of a reinforced ceramic three-dimensional constraint coating. The method comprises the following steps that 1, sand blasting equipment is adopted to performsand blasting coarsening treatment on the surface of a ceramic matrix; 2, fly dust on the surface of the ceramic matrix subjected to the sand blasting treatment in the step 1 is cleared, the surfaceof the ceramic matrix is cleaned with ultrasonic waves, and then drying is conducted; 3, spraying raw materials are crushed into powder, and weighing and taking 250 g are conducted for spraying; and 4, spraying treatment is conducted on the surface of the ceramic matrix, and the spraying treatment comprises plasma spraying and supersonic flame spraying. The coating prepared through the method andceramic have high bonding strength, when the ceramic is impacted, the coating breaks along with the ceramic, energy is absorbed, so that crack propagation is prevented, in addition, a fracture of thecoating can change the ceramic crack trend, a crack propagation area is increased, and the toughness is improved.

Description

Technical field [0001] The invention is a preparation method of a reinforced ceramic three-dimensional constrained coating, which belongs to the technical field of ceramic surface coating preparation. Background technique [0002] Ceramics have high hardness and low density, making them an excellent choice for preparing lightweight armor materials. However, its toughness is poor, and it is prone to brittle fracture after being impacted by a warhead, making it difficult to take advantage of its high hardness, which restricts its application in the field of armor protection. In order to improve its protective performance, the researchers through the microstructure adjustment to toughen ceramics and prepare ceramic-based composite materials to improve its toughness. However, the toughening effect of ceramics through microstructure adjustment is not obvious; the toughness of the prepared ceramic-based composite material is improved, but the hardness is reduced, which weakens its abi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/129C23C4/02C23C4/06C23C4/08C23C4/10
CPCC23C4/134C23C4/129C23C4/02C23C4/06C23C4/08C23C4/10
Inventor 米鹏博田歌魏成霖王旭东宋磊磊方炳程
Owner 中航装甲科技有限公司
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