Annular metal-ceramic gradient material and preparation method thereof

A gradient material, annular technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of mismatch of thermodynamic properties of interlayer bonding parts, increase the use cost of liquid metal batteries, and difficulty in controlling the size of gradient material stacks. The effect of uniform distribution of gradient components, small deformation and high molding efficiency

Active Publication Date: 2021-03-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The obtained gradient materials have certain difficulties in controlling the size of the stack, and there will be discontinuity in the composition at the stack interface, resulting in problems such as mismatching of the thermodynamic properties of the interlayer junctions.
[0006] Other common preparation methods, such as plasma spraying, laser cladding, vapor deposition, high-temperature self-propagating combustion, etc., have obvious cost problems, and the process is not easy to control
[0007] The structure between the collector and the anode of the liquid metal battery belongs to the annular combination, so the gradient material used for anti-corrosion between the collector and the anode requires a ring distribution in composition or structure distribution, and the commonly used preparation of the above-mentioned gradient materials method, this point is not emphasized in the preparation process, which increases the processing link in the preparation process, is not easy to achieve manufacturing and structure control, and increases the use cost of liquid metal batteries

Method used

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  • Annular metal-ceramic gradient material and preparation method thereof
  • Annular metal-ceramic gradient material and preparation method thereof
  • Annular metal-ceramic gradient material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment approach

[0132] The preferred embodiment of the annular metal-ceramic gradient material of the present invention is as follows:

[0133] The number of layers of the gradient layer is 6 layers, and the pure ceramic powder is selected from AlN powder (aluminum nitride ceramic powder), and the pure metal powder is selected from Mo powder (molybdenum metal powder).

[0134] The innermost layer is the first layer,

[0135] The raw material powder is AlN powder, and the ratio accounts for 90%;

[0136] The dispersant is dibutyl phthalate, with a ratio of 2.25%;

[0137] The binder is a mixture of high and low density polyethylene, with a ratio of 2.8%;

[0138] Lubricants are paraffin wax and stearic acid wax, proportioning 4.32%;

[0139] The sintering aid is diyttrium trioxide, proportioning 0.63%;

[0140] Second floor,

[0141] The raw material powder is 72% AlN powder + 18% Mo powder, and the ratio accounts for 90%;

[0142] The dispersant is dibutyl phthalate, with a ratio of 2.2...

Embodiment example 1

[0205] This implementation case provides a method for preparing a 6-layer AlN / Mo gradient material. Wherein, the preparation process includes the following specific steps:

[0206] (1) The number of gradient layers of the designed AlN / Mo gradient material is 6 layers, and the thickness of each layer can be determined according to specific requirements. The composition and ratio of each layer of powder from the inside to the outside are as follows: the innermost layer (AlN) 100wt.%, the second inner layer (AlN) 80wt.% + (Mo) 20wt.%, and the inner middle layer (AlN) 60wt. .% + (Mo) 40wt.%, biased towards the outer middle layer (AlN) 40wt.% + (Mo) 60wt.%, the second outer layer (AlN) 20wt.% + (Mo) 80wt.%, the outermost layer ( Mo) 100wt.%.

[0207] (2) Select AlN powder and Mo powder as raw powder materials, the raw particle size of AlN powder is 50nm, and the raw particle size of Mo powder is less than 1 μm. AlN powder and Mo powder are used to configure the original mixed ra...

Embodiment example 2

[0213] This implementation case provides a method for preparing an alumina-tungsten (W / Al2O3) cermet gradient material, wherein the preparation process includes the following specific steps:

[0214](1) The number of gradient layers of the designed W / Al2O3 gradient material is 4 layers, and the thickness of each layer can be determined according to specific requirements. The composition and ratio of each layer of powder from the inside to the outside are as follows: the innermost layer (Al2O3) 100wt.%, the second inner layer (Al2O3) 80wt.% + (W) 20wt.%, the second outer layer (Al2O3) 20wt.% + (W) 80wt.%, the outermost layer (W) 100wt.%.

[0215] (2) Select Al2O3 powder and W powder as the original powder materials, the original powder particle size of Al2O3 powder is 20-30nm, and the original particle size of W powder is less than 1μm. Al2O3 powder and W powder are used to configure the original mixed raw materials of each layer according to the ratio set in step 1, and then ...

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Abstract

The present invention relates to an annular metal-ceramic gradient material and a preparation method thereof. The structure the gradient material is annularly distributed from inside to outside, one ring is a gradient layer, and each gradient layer comprises the following components of, by weight, 88% to 90% of raw material powder, 2.25% to 3.3% of a dispersing agent, 2.8% to 3.22% of a binding agent, 4.32% to 5.4% of a lubricant and 0.54% to 0.86% of a sintering additive. According to different gradient layers, the raw material powder comprises pure ceramic powder, pure metal powder and mixture of powder of the pure ceramic powder and the pure metal powder in any mixing proportion. According to the annular metal-ceramic gradient material and the preparation method thereof, the number of layers is controlled through injection molding, the process is simplified, the cost is reduced, the molding efficiency is high, the deformability is small, the gradient components are uniformly distributed, the structural precision and the size precision are high, the interlayer cohesiveness is good, the density and the bending strength are high, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of gradient material preparation, in particular to an annular metal-ceramic gradient material and a preparation method thereof. Background technique [0002] Gradient materials refer to heterogeneous materials that have a composition or structure distribution that presents a gradient gradient in space. Due to its gradient in composition or structure, it can realize gradually changing functional properties. Gradient materials have broad application prospects in chemical engineering, biomedicine, electronic information, aerospace and other fields. [0003] Liquid metal battery is a new type of energy storage technology developed in recent years. In the actual application and development process, there is a corrosion problem between the collector and the anode, which restricts its further development. The use of metal-ceramic gradient materials, on the one hand, can exert the high-efficiency insulation and cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/02B22F1/00C22C27/04C22C29/16C22C32/00C04B35/581C04B35/632C04B35/634C04B35/64
CPCB22F7/02C22C27/04C22C29/16C22C29/005C22C32/0068C04B35/581C04B35/632C04B35/63408C04B35/64C04B35/63496B22F2207/03C04B2235/3225C04B2235/6562C04B2235/6567C04B2235/6565B22F1/103B22F1/10
Inventor 李宝让刘钰刘奇文博陈豪志吴卓彦吴云翼
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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