Dispersion strengthened ceramic composite material and preparation method thereof

A ceramic composite material and dispersion strengthening technology, applied in the field of composite materials and engineering ceramic materials, can solve the problems of poor corrosion resistance and wear resistance, increased production cost, easy to block nozzles, etc., and achieve low porosity and comprehensive mechanical properties. Improved, good mechanical properties

Active Publication Date: 2017-05-31
NORTHEASTERN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As the key equipment for fluid transportation, centrifugal pumps are mainly made of cast steel, stainless steel, metal-lined rubber and metal-lined ceramics. Although wear-resistant duplex stainless steel has high strength and good plasticity, it is corrosive to solid-liquid during long-term transportation. Due to the poor corrosion resistance and wear resistance of the material in the medium, the loss of the fluid conveying equipment is relatively large, which not only increases the production cost, but also easily creates potential safety hazards
In order to solve this problem, the method of lining rubber or ceramics is often used, but due to the disadvantages of rubber and ceramic materials such as service life, easy falling off and easy clogging of nozzles, it is urgent to develop metals with strong wear resistance, corrosion resistance and high temperature resistance. New matrix composite materials and related preparation technologies

Method used

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  • Dispersion strengthened ceramic composite material and preparation method thereof

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Effect test

Embodiment 1

[0051] A dispersion-strengthened ceramic composite material, which is composed of silicon carbide, calcium sulfate whiskers, metal titanium fibers with a passivation film on the surface, and a composite binder. In the ceramic composite material, silicon carbide particles of different shapes , calcium sulfate whiskers, metal titanium fibers and composite binder interweave and distribute; where:

[0052] According to the mass ratio, 1.5mm ± 0.5mm polyhedral silicon carbide particles: 450 μm ± 50 μm polyhedral silicon carbide particles: 15 μm ± 5 μm spherical silicon carbide: 100nm spherical nano-silicon carbide: calcium sulfate whiskers with an aspect ratio of 100 and a diameter of 1 μm: Metal titanium fibers with a passivation film on the surface of a diameter of 8 μm and a length of 1 mm: composite binder = 30:5:20:5:10:5:15;

[0053] Described composite binder is made up of epoxy resin and star-shaped block copolymer, by mass ratio, epoxy resin: star-shaped block copolymer=99...

Embodiment 2

[0065] A dispersion-strengthened ceramic composite material, which is composed of silicon carbide, calcium sulfate whiskers, metal titanium fibers with a passivation film on the surface, and a composite binder. In the ceramic composite material, silicon carbide particles of different shapes , calcium sulfate whiskers, metal titanium fibers and composite binder interweave and distribute; where:

[0066] According to the mass ratio, 2.5mm ± 0.5mm polyhedral silicon carbide particles: 450 μm ± 50 μm polyhedral silicon carbide particles: 15 μm ± 5 μm spherical silicon carbide: 90 nm spherical nano-silicon carbide: calcium sulfate whiskers with an aspect ratio of 90 and a diameter of 1.5 μm : 10 μm in diameter and 1.2 mm in length, titanium metal fibers with a passivation film on the surface: composite binder = 5: 30: 20: 1: 5: 5: 30;

[0067] Described composite binder is made up of epoxy resin and star-shaped block copolymer, by mass ratio, epoxy resin: star-shaped block copolyme...

Embodiment 3

[0079] A dispersion-strengthened ceramic composite material, which is composed of silicon carbide, calcium sulfate whiskers, metal titanium fibers with a passivation film on the surface, and a composite binder. In the ceramic composite material, silicon carbide particles of different shapes , calcium sulfate whiskers, metal titanium fibers and composite binder interweave and distribute; where:

[0080] According to the mass ratio, 2mm ± 0.5mm polyhedral silicon carbide particles: 450 μm ± 50 μm polyhedral silicon carbide particles: 15 μm ± 5 μm spherical silicon carbide: 90nm spherical nano-silicon carbide: calcium sulfate whiskers with an aspect ratio of 110 and a diameter of 0.5 μm: Metal titanium fibers with a passivation film on the surface of a diameter of 7 μm and a length of 2.4 mm: composite binder = 15: 15: 10: 3: 10: 0.5: 25;

[0081] Described composite binder is made up of epoxy resin and star-shaped block copolymer, by mass ratio, epoxy resin: star-shaped block co...

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Abstract

The invention discloses a dispersion strengthened ceramic composite material and a preparation method thereof and belongs to the field of composite materials and engineering ceramic materials. The composite material is formed by compounding silicon carbide of different forms, calcium sulfate whiskers, metal fibers and a composite adhesive, wherein the silicon carbide of different forms, the calcium sulfate whiskers, the metal fibers and the composite adhesive are interweaved and distributed. The preparation method comprises the following steps: 1) uniformly mixing the silicon carbide, the calcium sulfate whiskers, the metal fibers and the composite adhesive under vacuum conditions so as to prepare slurry; 2) vibrating and casting the slurry in a mold under vacuum; and 3) curing the mold and cast slurry, thereby obtaining the dispersion strengthened ceramic composite material. According to the method disclosed by the invention, the problems of wear and corrosion of highly corrosive solid-liquid media on pump materials during transport are effectively solved, and the prepared composite material has the characteristics of high metal matrix adhesion force, high hardness, wear resistance, corrosion resistance, oxidation resistance, thermal shock resistance and the like and is applied to the fields of chemical industry, pharmacy, papermaking and the like.

Description

technical field [0001] The invention belongs to the field of composite materials and engineering ceramic materials, and in particular relates to a dispersion-strengthened ceramic composite material and a preparation method thereof. Background technique [0002] As the key equipment for fluid transportation, centrifugal pumps are mainly made of cast steel, stainless steel, metal-lined rubber and metal-lined ceramics. Although wear-resistant duplex stainless steel has high strength and good plasticity, it is corrosive to solid-liquid during long-term transportation. Due to the poor corrosion resistance and wear resistance of the material in the medium, the loss of the fluid conveying equipment is relatively large, which not only increases the production cost, but also easily causes safety hazards. In order to solve this problem, the method of lining rubber or ceramics is often used, but due to the disadvantages of rubber and ceramic materials such as service life, easy falling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/81C04B35/565C04B35/76
CPCC04B35/565C04B35/76C04B35/806C04B2235/48C04B2235/5276C04B2235/5427C04B2235/5436C04B2235/5454C04B2235/96
Inventor 姜茂发宋景尧史培阳范汇超陆建民
Owner NORTHEASTERN UNIV
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