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Preparation method of grouting molding of metal/ceramic gradient material in alternating magnetic field

A technology of alternating magnetic field and grouting molding, which is applied in the field of material preparation to achieve the effects of wide application range, cost reduction and process simplification

Inactive Publication Date: 2018-05-11
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the above-mentioned methods have great limitations

Method used

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  • Preparation method of grouting molding of metal/ceramic gradient material in alternating magnetic field

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Experimental program
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Effect test

Embodiment 1

[0035] Step 1) Plaster Mold Preparation

[0036] a—gypsum and b—gypsum mixed with water, poured after mixing evenly, and the gypsum slurry is solidified, hardened and dried. The inner cavity of the mold is a disc with a height of 15mm and a diameter of 15mm;

[0037] Step 2) Slurry Preparation

[0038] Metallic Cu particles with a particle size of 0.1 μm and ZrO particles with a particle size of 0.1 μm 2 The ceramic particles are mixed into a mixed powder according to the mass ratio of 0.1:1, and the solvent water, the dispersant polyvinyl butyral and the binder polyethylene trimethylpropane triacrylate are added, and the content of the dispersant is 0.1% of the mass fraction of the slurry , the adhesive is 1% of the mass fraction of the slurry, milled in a ball mill for 1 hour, and ultrasonically dispersed for 1 minute to obtain a uniformly dispersed slurry;

[0039] Step 3) Grouting in alternating magnetic field

[0040] Fill the slurry into the plaster mold, and apply an...

Embodiment 2

[0045] Step 1) Plaster Mold Preparation

[0046] a—gypsum and b—gypsum mixed with water, poured after mixing evenly, and the gypsum slurry is solidified, hardened and dried. The inner cavity of the mold is a disc with a height of 15mm and a diameter of 15mm;

[0047] Step 2) Slurry Preparation

[0048] Mix metal Al particles with a particle size of 1 μm and SiC ceramic particles with a particle size of 1 μm at a mass ratio of 1:1 to form a mixed powder, add solvent dibasic ester, dispersant polyvinylpyrrolidone and binder polyvinyl butyral , the dispersant content is 0.3% of the mass fraction of the slurry, the adhesive is 2% of the mass fraction of the slurry, ball milled in a ball mill for 2 hours, and ultrasonically dispersed for 3 minutes to obtain a uniformly dispersed slurry;

[0049] Step 3) Grouting in alternating magnetic field

[0050] Fill the slurry into the plaster mold, and apply an alternating magnetic field outside the mold. The alternating magnetic field is ...

Embodiment 3

[0055] Step 1) Plaster Mold Preparation

[0056] a—gypsum and b—gypsum mixed with water, poured after mixing evenly, and the gypsum slurry is solidified, hardened and dried. The inner cavity of the mold is a disc with a height of 15mm and a diameter of 15mm;

[0057] Step 2) Slurry Preparation

[0058] Metallic Ag particles with a particle size of 10 μm and SiO with a particle size of 10 μm 2 The ceramic particles are mixed into a mixed powder according to the mass ratio of 10:1, and the solvent high boiling point gasoline, the dispersant water glass and the binder acrylamide are added. The content of the dispersant is 0.8% of the mass fraction of the slurry, and the binder is the mass fraction of the slurry. 3%, milled in a ball mill for 5 hours, and ultrasonically dispersed for 5 minutes to obtain a uniformly dispersed slurry;

[0059] Step 3) Grouting in alternating magnetic field

[0060] Fill the slurry into the plaster mold, and apply an alternating magnetic field out...

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Abstract

The invention relates to a grouting preparation method for a metal / ceramic gradient material in an alternating magnetic field, belonging to the field of material preparation. The steps are: 1) Prepare a hemihydrate gypsum mold; 2) Mix metal powder with excellent conductivity and ceramic powder with high resistivity with water or non-aqueous solvent in a certain proportion, stir to form a uniformly dispersed slurry, and cast; 3 ) Apply an alternating magnetic field outside the mold, the sample is located at the end of the alternating magnetic field coil, the current intensity is 0.1-20A, the current frequency is 102-105Hz, and the action time is 1-20min 4) Dry the sample and sinter it. The method of the present invention has the advantages that: on the basis of the grouting molding process, an alternating magnetic field is applied to prepare gradient materials, and by adjusting process parameters such as current intensity and frequency, gradient materials with continuously changing and controllable components can be conveniently prepared, and the cost is greatly increased. reduce.

Description

technical field [0001] The invention relates to a grouting preparation method for a metal / ceramic gradient material in an alternating magnetic field, and belongs to the field of material preparation. Background technique [0002] Slip Casting, also known as Slip Casting: It is based on the physical characteristics of porous plaster molds that can absorb water. The ceramic powder is formulated into a fluid slurry, and then injected into a porous mold (mainly plaster mold). Moisture After being inhaled by the mold (gypsum), a uniform mud layer with a certain thickness is formed, and a green body with a certain strength is formed during the dehydration and drying process. This method is called grouting molding. [0003] The completion process can be divided into three stages: 1. After the mud is injected into the mold, the water in the mud is absorbed under the action of the capillary force of the plaster mold. The water in the mud near the mold wall is first absorbed, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22
Inventor 彭晓领
Owner CHINA JILIANG UNIV
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