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a sialon-mgal 2 o 4 -sic composite wear-resistant ceramic material and preparation method thereof

A sialon-mgal2o4-sic, wear-resistant ceramic technology, applied in the field of wear-resistant materials, can solve the problems of expensive raw materials, poor erosion resistance and wear resistance, poor sintering of advanced wear-resistant ceramic materials, and high production costs, and achieve excellent erosion and wear performance , excellent performance, and the effect of reducing the sintering temperature

Active Publication Date: 2016-09-07
力量知识产权天津有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that metals and alloy materials currently used as wear-resistant materials have outstanding problems such as expensive raw materials, poor erosion and wear resistance under special conditions, difficult sintering of advanced wear-resistant ceramic materials, and high production costs. A low-cost and high-performance new type of Sialon-MgAl is prepared from high-alumina industrial solid waste aluminum ash, magnesite and SiC, which are easily obtained in industry, through component design control and aluminothermic reduction and nitriding reaction sintering 2 o 4 -SiC composite wear-resistant ceramic material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] raw material:

[0025] Aluminum ash produced by electrolytic aluminum, its chemical composition (w): Al 2 o 3 18.02%, AlN 14.13%, Al 18.62%, MgO7.1%, SiO 2 5.9%, Fe 2 o 3 4.0%, CaO 2.8%, Na 2 O 2.6%, TiO 2 1.6%, loss on ignition 12.8%, other 12.43%, accounting for 20% of the total mass fraction of ingredients;

[0026] Magnesite (MgCO 3 Content 92.4%) accounts for 12% of the total ingredients mass fraction;

[0027] Natural quartz powder (SiO 2 Content 90.6%, particle size ≤0.074mm) accounted for 5% of the total ingredients mass fraction;

[0028] SiC (green silicon carbide) accounts for 63% of the total mass fraction of the ingredients, and its particle gradation (accounting for the mass fraction of the total amount of SiC added): 45% of 3-1mm large particles, 30% of 1-0mm medium particles, 0-0.15 mm small particles 15%, fine powder less than 0.074mm 10%;

[0029] The binder can use industrial dextrin with a concentration of about 30%, accounting for 3% ...

Embodiment 2

[0044] raw material:

[0045] Aluminum ash produced by electrolytic aluminum, its chemical composition (w): Al 2 o 3 18.02%, AlN 14.13%, Al 18.62%, MgO7.1%, SiO 2 5.9%, Fe 2 o 3 4.0%, CaO 2.8%, Na 2 O 2.6%, TiO 2 1.6%, loss on ignition 12.8%, other 12.43%, accounting for 25% of the total mass fraction of ingredients;

[0046] Magnesite (MgCO 3 Content 92.4%) accounted for 10% of the total ingredients mass fraction;

[0047] Natural quartz powder (SiO 2 Content 90.6%, particle size ≤0.074mm) accounted for 8% of the total ingredients mass fraction;

[0048] SiC (green silicon carbide) accounts for 52% of the total mass fraction of the ingredients, and its particle gradation (accounting for the mass fraction of the total amount of SiC added): 45% of 3-1mm large particles, 30% of 1-0mm medium particles, 0-0.15 mm small particles 15%, fine powder less than 0.074mm 10%;

[0049] The binder can use a polyvinyl alcohol solution with a concentration of about 10%, accounti...

Embodiment 3

[0064] raw material:

[0065] Aluminum ash produced by electrolytic aluminum, its chemical composition (w): Al 2 o 3 18.02%, AlN 14.13%, Al18.62%, MgO7.1%, SiO 2 5.9%, Fe 2 o 3 4.0%, CaO 2.8%, Na 2 O 2.6%, TiO 2 1.6%, loss on ignition 12.8%, other 12.43%, accounting for 15% of the total ingredients mass fraction;

[0066] Magnesite (MgCO 3 Content 92.4%) accounted for 10% of the total ingredients mass fraction;

[0067] Natural quartz powder (SiO 2 Content 90.6%, particle size ≤0.074mm) accounted for 5% of the total ingredients mass fraction;

[0068] SiC (green silicon carbide) accounts for 70% of the total mass fraction of the ingredients, and its particle gradation (accounting for the mass fraction of the total amount of SiC added): 45% of 3-1mm large particles, 30% of 1-0mm medium particles, 0-0.15 mm small particles 15%, fine powder less than 0.074mm 10%;

[0069] The binder can use a calcium lignosulfonate solution with a concentration of about 30%, account...

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Abstract

The invention discloses a Sialon-MgAl2O4-SiC composite wear-resistant ceramic material and a preparation method thereof. Aluminum ash, magnesite and SiC are used as raw materials, natural quartz powder is used as an additive, and pulp dry powder, industrial dextrin or polyvinyl alcohol is used. The solution is a binder, and the specific preparation steps are as follows: first, ball mill aluminum ash and magnesite to form a mixed fine powder, then add SiC particles and fine powder to the mixed fine powder and stir evenly, add an appropriate amount of binder and press into a green body, It can be obtained by subjecting the green body to isostatic pressing and drying, and then keeping warm and sintering in a high-temperature kiln under a nitrogen atmosphere. The Sialon-MgAl2O4-SiC multiphase wear-resistant ceramic material prepared by the present invention can not only solve the problems of sintering difficulty and low cost of SiC wear-resistant ceramic materials, but also can provide resources for zero-emission resource utilization of aluminum ash and high-efficiency utilization of magnesite important technical approach.

Description

technical field [0001] The invention relates to a method for preparing Sialon-MgAl by utilizing industrial solid waste aluminum ash, magnesite and silicon carbide 2 o 4 -SiC composite phase wear-resistant ceramic material, which belongs to the technical field of wear-resistant materials. Background technique [0002] For a long time, the research on erosion-resistant abrasive materials has attracted extensive attention from domestic and foreign scholars, and has carried out in-depth and meticulous research work. From the perspective of the development stage of wear-resistant erosion materials, it has experienced the development process from ordinary white cast iron and manganese steel → nickel hard cast iron → high chromium white cast iron → bainite ductile iron. However, these metals and alloy materials cannot meet the actual production requirements well due to their poor erosion resistance and chemical corrosion resistance under the conditions of liquid-solid two-phase f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/599C04B35/622
Inventor 黄军同侯喜锋王小军张尚铎崔应武
Owner 力量知识产权天津有限公司