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Metal aluminum bonded silicon carbide composite material and preparation method thereof

A technology of silicon carbide and metal aluminum, applied in the field of metal aluminum combined with silicon carbide composite materials and its preparation, can solve the problems of complex production process, poor thermal shock stability, poor high temperature performance, etc., to improve interface performance and reduce porosity , the effect of high temperature

Active Publication Date: 2019-11-08
唐山贝斯特高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicon carbide composite materials are usually oxide-bonded silicon carbide and silicon nitride-bonded silicon carbide materials. The production process of silicon nitride-bonded silicon carbide materials is complicated, and it needs to be protected and fired in a nitrogen atmosphere. The equipment is complicated and the production cost is high; oxidation Physically bonded silicon carbide material, complex bonding phase, low melting point, poor high temperature performance, poor thermal shock stability, and usually low service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: The metal-aluminum-bonded silicon carbide composite material is prepared by the following method.

[0016] The weight percent content of the raw materials is: silicon carbide powder 92%, aluminum powder 8%, plus 4% thermosetting liquid phenolic resin, and the above 4% is 4% of the total weight of the powder. Among them, the weight proportion of raw materials of each particle size in the powder is: 20% of silicon carbide particles of 1.5-2.5mm, 30% of silicon carbide particles of 1-1.5mm, 15% of silicon carbide particles of 0.5-1mm, particle size 20% of silicon carbide fine powder ≤74um, 7% of silicon carbide fine powder of particle size ≤5um; 8% of aluminum powder of particle size ≤45um; the viscosity of the thermosetting liquid phenolic resin is 10Pa·S (25°C), carbon residue 44.3 %.

[0017] Mix the above raw materials evenly and press them on a press to form them, then dry them at 180°C for 24 hours, and finally fire them at 1400°C at a high temperature...

Embodiment 2

[0019] Embodiment 2: The metal-aluminum-bonded silicon carbide composite material is prepared by the following method.

[0020] The weight percentage content of the raw materials is: 95% of silicon carbide powder, 5% of aluminum powder, plus 3.5% of thermosetting liquid phenolic resin. Among them, the weight proportion of raw materials of each particle size in the powder is: 25% of silicon carbide particles of 1.5-2.5mm, 25% of silicon carbide particles of 1-1.5mm, 20% of silicon carbide particles of 0.5-1mm, particle size 20% of silicon carbide fine powder ≤45um, 5% of silicon carbide fine powder of particle size ≤5um; 5% of aluminum powder of particle size ≤74um; the viscosity of the thermosetting liquid phenolic resin is 9Pa·S (25℃), carbon residue 40 %.

[0021] Mix the above raw materials evenly and press them on a press to form them, then dry them at 180°C for 24 hours, and finally fire them at 1450°C at a high temperature and keep them warm for 5 hours to get the metal...

Embodiment 3

[0023] Embodiment 3: The metal-aluminum-bonded silicon carbide composite material is prepared by the following method.

[0024] The weight percent content of raw materials is: 93% of silicon carbide powder, 7% of aluminum powder, plus 3% of thermosetting liquid phenolic resin. Among them, the weight proportion of raw materials of each particle size in the powder is: 20% of silicon carbide particles of 2.0-3.0mm, 20% of silicon carbide particles of 1-2.0mm, 16% of silicon carbide particles of 0.5-1mm, and the particle size 30% of silicon carbide fine powder ≤100um, 7% of silicon carbide fine powder of particle size ≤5um; 7% of aluminum powder of particle size ≤60um; the viscosity of the thermosetting liquid phenolic resin is 12Pa·S (25°C), carbon residue 41.6 %.

[0025] Mix the above raw materials evenly and press them on a press to form them, then dry them at 200°C for 15 hours, and finally fire them at 1480°C at a high temperature and keep them warm for 2 hours to get the s...

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Abstract

The invention discloses a metal aluminum / silicon carbide-combined complex phase material and a preparation method thereof. The complex phase material is prepared by mixing and sintering powder and a binder. The powder is composed of the following components in percentage by weight: 90-95% of silicon carbide powder and 5-10% of aluminum powder. The metal aluminum used as the combination phase has plastic deformation capacity at normal temperature, and is capable of enhancing the forming density and reducing the porosity. The complex phase material can react with resin carbon residues at high temperature to generate high-melting-point aluminum carbide, or can be oxidized to generate aluminum oxide and silicon carbide and oxidized to generate silicon oxide so as to form a mullite phase, thereby improving the properties of the interface and preventing the silicon carbide inside the particles from being further oxidized. The complex phase material has the advantages of high melting point, high heat conductivity, low thermal expansivity, high thermal shock stability and high wear resistance. The material can be used as heat treatment furnace guide rails, liners, flame insulation plates, slabs, saggars and other ceramic kiln tools. The method has the characteristics of simple technique, favorable comprehensive properties of the product and the like. The product has the advantages of higher application temperature, high heat conductivity, high wear resistance, favorable thermal shock stability and favorable oxidation resistance.

Description

technical field [0001] The invention relates to a composite phase material and a preparation method thereof, in particular to a metal aluminum bonded silicon carbide composite phase material and a preparation method thereof. Background technique [0002] Silicon carbide refractory material (composite phase material) has a high melting point, high strength, high thermal conductivity and high wear resistance, and is the main lining material and rail material for industrial furnaces, especially high-temperature heat treatment furnaces and powder metallurgy sintering furnaces; Good thermal shock stability and high temperature strength make it widely used in ceramics, electric porcelain kiln furniture and other fields. Silicon carbide composite materials are usually oxide-bonded silicon carbide and silicon nitride-bonded silicon carbide materials. The production process of silicon nitride-bonded silicon carbide materials is complicated, and it needs to be protected and fired in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/565C04B35/622
CPCC04B35/565C04B35/622C04B35/66C04B2235/402C04B2235/77C04B2235/96C04B2235/9607
Inventor 陈永强王义龙张连进马玉龙杨强
Owner 唐山贝斯特高温材料有限公司
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