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Metal ceramic composite material and preparation method thereof

A cermet and composite material technology, applied in metal layered products, ceramic layered products, chemical instruments and methods, etc., can solve the problems of difficulty in ensuring safety, high specific strength, and high cost, and achieve improved strength and performance. Good bending resistance, easy to prepare results

Inactive Publication Date: 2015-03-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of these hollow structures directly affects the service performance and service life of the corresponding structures. If the hollow structure is made of a high-strength alloy, the cost will be high, and the hollow structure made of cheap materials has low strength. It is difficult to ensure safety during the process or when subjected to large shock loads
When using a solid metal structure in some occasions, although the solid metal structure guarantees the strength required to bear the load, it often has the problems of heavy weight, high material consumption, and high cost, and requires a lot of manpower and material resources in the installation process. , and the high self-weight will bring some safety hazards to the performance of the overall structure
[0003] Porous materials have the characteristics of low density and high specific strength, but are brittle and cannot be used once cracked
Metal materials have good plasticity and toughness, are easy to process and shape, and are not prone to brittle fracture during use, but have high density and poor rigidity
[0004] Among porous materials, glass fiber reinforced silica airgel has a porous network space structure, low density and large surface area, and is usually used as a thermal insulation material, catalyst carrier and adsorbent, but the material is brittle and Low strength, there is no report on its application to load-bearing materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A metal-ceramic composite material, the metal-ceramic composite material is composed of a metal jacket and a porous ceramic, and the metal jacket is coated on the outside of the porous ceramic by a self-propagating combustion process;

[0041] Among them, the material of the metal jacket is steel; the porous ceramic is B 4 C / Al 2 o 3 Composite ceramics, the preparation process is as follows:

[0042] (1) Preparation of mixed powder

[0043] Al, carbon black and B 2 o 3 Mix, after ball milling at 200r / min for 8h, dry at a constant temperature at 90°C for 24h, sieve the mixed powder with a 50 mesh standard test sieve to obtain the mixed powder;

[0044] Among them, Al powder, carbon black and B 2 o 3 The weight ratio is 9:1:10;

[0045] The purity of Al powder is 99.9%, and the particle size is 2-5μm; the purity of carbon black is 98.5%, and the particle size is 0.2-0.3μm; B 2 o 3 The purity of the product is 98%, and the particle size is 1-150 μm;

[0046] (2)...

Embodiment 2

[0052] A metal-ceramic composite material, the metal-ceramic composite material is composed of a metal jacket and a porous ceramic, and the metal jacket is coated on the outside of the porous ceramic by a self-propagating combustion process;

[0053] Among them, the material of the metal jacket is steel; the porous ceramic is B 4 C / Al 2 o 3 Composite ceramics, wherein the preparation process of the mixed powder and the preform is the same as in Example 1, and the self-propagating reaction is induced by microwave sintering to synthesize the metal-ceramic composite material, and the specific process is as follows:

[0054] The experimental equipment is a microwave muffle furnace produced by Nanjing Jiequan Microwave Equipment Co., Ltd. The prefabricated body is placed horizontally in the furnace cavity, and the furnace cavity is evacuated to a pressure ≤ 10Pa with the vacuum pump equipped with the sintering furnace. Adjust the power of the microwave sintering furnace to 3Kw an...

Embodiment 3

[0056] A metal-ceramic composite material, the metal-ceramic composite material is composed of a metal jacket and porous ceramics, the metal jacket is coated on the outside of the porous ceramics through a bonding process; the material of the metal jacket is 45 steel; the porous ceramics are glass fiber reinforced two Silica airgel, the preparation method of the metal-ceramic composite material is as follows:

[0057] (1) Preparation of glass fiber reinforced silica airgel

[0058] 1.1 Preparation of silica sol

[0059] Stir and mix ethyl orthosilicate and ethanol, add ammonia water to catalyze while stirring, and obtain silica sol;

[0060] Wherein, the volume of tetraethyl orthosilicate: the volume of ethanol=1:1, the volume that adds ammoniacal liquor is 50% of the volume summation of tetraethyl orthosilicate and ethanol;

[0061] 1.2 Preparation of glass fiber reinforced silica alcohol gel

[0062] Immersing glass fibers in the silica sol, stirring for 20 minutes to for...

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Abstract

The invention discloses a metal ceramic composite material and a preparation method thereof, belonging to the field of composite materials. The metal ceramic composite material is composed of a metal coat and porous ceramic, wherein the porous ceramic is a massive material, and the metal coat is wrapped outside the porous ceramic through a self-propagating combustion or bonding process; preferably, the metal coat is made of steel, when the self-propagating combustion process is adopted, the porous ceramic is B4C / Al2O3 complex-phase ceramic; and when the bonding process is adopted, the porous ceramic is glass fiber reinforced silicon dioxide aerogel. The metal ceramic composite material is relatively high in strength, small in weight, low in cost, easy to prepare and favorable in bending resistance.

Description

technical field [0001] The invention relates to a metal-ceramic composite material and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] In some occasions where metal structures are used, hollow metal structures are welded in order to reduce weight, such as bicycle frames, luggage pull rods, engineering beams, etc. The performance of these hollow structures directly affects the service performance and service life of the corresponding structures. If the hollow structure is made of a high-strength alloy, the cost will be high, and the hollow structure made of cheap materials has low strength. It is difficult to ensure safety during the process or when subjected to large impact loads. When using a solid metal structure in some occasions, although the solid metal structure guarantees the strength required to bear the load, it often has the problems of heavy weight, high material consumption, and high cost, and requires a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/04B32B18/00B32B1/08B32B37/00B32B37/12C04B37/02C04B30/02
Inventor 李云凯孙川万明明
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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