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Preparation method of metal ceramic composite material

A technology of composite materials and cermets, applied in the field of materials, can solve problems such as difficulty in obtaining large and uniform products, and SiC particles are easy to fall off, and achieve the effects of reducing internal stress, increasing roughness, and reducing uncertainty

Active Publication Date: 2020-10-16
BEIJING SINOMA SYNTHETIC CRYSTALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 0-3 type structure has the problem that SiC particles are easy to fall off during friction, and in the process of preparing the 3-3 type structure composite material, the ceramic has metal wetting problems during the impregnation of molten metal, and it is difficult to obtain large and uniform products.

Method used

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  • Preparation method of metal ceramic composite material
  • Preparation method of metal ceramic composite material
  • Preparation method of metal ceramic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: Metal-ceramic composite material of the present invention

[0060] (1) Preparation of foamed SiC ceramics: 30 g of acrylamide, 2 g of N,N-methylenebisacrylamide, and 210 g of deionized water were put into a magnetic stirrer and stirred to dissolve to prepare a premix. Put 278.4g of SiC powder, 3.48g of strong tetramethylammonium oxide, 2.32g of polyvinyl alcohol, and 232g of the premix into a nylon resin ball mill jar, add alumina balls, and mill at a speed of 350r / min for 6 hours to obtain a slurry. Weigh 400g of the ball-milled slurry and pour it into a beaker, add 7.2g of sodium lauryl sulfate, 0.48g of ammonium persulfate and 0.24g of tetramethylethylenediamine in turn, and use a magnetic stirrer at a stirring speed of 240r / min Stir and foam, then stir at a stirring speed of 60r / min until the bubbles are uniform. Pour the uniformly foamed slurry into the mold, keep it warm in a water bath at 40°C for 0.5h, remove the mold after the gel solidifies, put ...

Embodiment 2

[0067] Example 2: Metal-ceramic composite material of the present invention

[0068] (1) Preparation of foamed SiC ceramics: put 24g of acrylamide, 1.6g of N,N-methylenebisacrylamide, and 168g of deionized water into a magnetic stirrer to stir and dissolve to prepare a premix. Put 222.7g of SiC powder, 2.78g of tetramethylammonium strong ammonium oxide, 1.86g of polyvinyl alcohol, and 186g of premix into a nylon resin ball mill jar, add alumina balls at a speed of 350r / min, and mill for 6 hours to obtain a slurry. Weigh 300g of the ball-milled slurry and pour it into a beaker, add 5.4g of sodium lauryl sulfate, 0.36g of ammonium persulfate and 0.18g of tetramethylethylenediamine in turn, and use a magnetic stirrer at a stirring speed of 200r / min Stir and foam, then stir at a stirring speed of 40r / min until the bubbles are uniform. Pour the evenly foamed slurry into the mold, keep it warm in a water bath at 35°C for 0.5h, remove the mold after the gel solidifies, put it in a...

Embodiment 3

[0076] Example 3: A metal-ceramic composite material

[0077](1) Preparation of foamed SiC ceramics: 30 g of acrylamide, 2 g of N,N-methylenebisacrylamide, and 210 g of deionized water were put into a magnetic stirrer and stirred to dissolve to prepare a premix. Put 278.4g of SiC powder, 3.48g of strong tetramethylammonium oxide, 2.32g of polyvinyl alcohol, and 232g of the premix into a nylon resin ball mill jar, add alumina balls, and mill at a speed of 350r / min for 6 hours to obtain a slurry. Weigh 400g of the ball-milled slurry and pour it into a beaker, add 7.2g of sodium lauryl sulfate, 0.48g of ammonium persulfate and 0.24g of tetramethylethylenediamine in turn, and use a magnetic stirrer at a stirring speed of 240r / min Stir and foam, then stir at a stirring speed of 60r / min until the bubbles are uniform. Pour the uniformly foamed slurry into the mold, keep it warm in a water bath at 40°C for 0.5h, remove the mold after the gel solidifies, put it in a constant tempera...

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Abstract

The invention discloses a preparation method of a metal ceramic composite material. The method comprises the following steps: (1) sequentially carrying out crushing, ultrasonic cleaning and drying onfoamed SiC ceramic according to the procedures of primary crushing, secondary crushing and tertiary crushing to obtain an ellipsoidal SiC ceramic block with the size of 2 mm to 15 mm; (2) carrying outpre-oxidation, pre-corrosion and cleaning on the ellipsoidal SiC ceramic block obtained in the step (1) to obtain a foamed SiC ceramic reinforcement; and (3) mixing the foamed SiC ceramic reinforcement obtained in the step (2) with metal, putting the mixture into a mold, performing heating and applying pressure in a nitrogen atmosphere, performing cooling, solidifying, demolding and polishing toobtain the metal ceramic composite material.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a metal-ceramic composite material. Background technique [0002] Metal-ceramic composite materials have excellent wear resistance much better than ordinary metal materials, and are considered to be an ideal wear-resistant braking material. Brake discs and other components made of this material have broad application prospects in high-speed rail and other fields. . The ceramic phase in metal-ceramic composites as a reinforcing phase is the key to improving the wear resistance of metal-ceramic composites. In addition, since the thermal conductivity of metallic materials is generally excellent, the thermal conductivity of the ceramic phase determines the thermal conductivity of the composite material. SiC ceramics have excellent thermal conductivity and wear resistance. As a reinforcing phase in metal-ceramic composites, they have attracted much attention. The meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C1/10B22F3/14
CPCC22C1/1015B22F3/14B22F2999/00C22C1/1021B22F2201/02
Inventor 郑彧童亚琦张跃宋国强张伟儒张哲
Owner BEIJING SINOMA SYNTHETIC CRYSTALS CO LTD
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