A Si3N4-based ceramic tool material with graphene added and its preparation method

A ceramic tool and graphene technology, which is applied in the Si3N4-based ceramic tool material with graphene added and its preparation field, can solve the problems of prone to produce pores and defects, the overall performance needs to be improved, and the matrix is ​​not tightly bonded, etc., to achieve good comprehensive mechanics performance, improving comprehensive mechanical properties and lubricating properties, and the effect of complete morphology

Active Publication Date: 2019-04-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ti(C,N) material and Si 3 N 4 The combination of the matrix is ​​not tight, easy to produce pores and defects, and the overall performance needs to be improved

Method used

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  • A Si3N4-based ceramic tool material with graphene added and its preparation method
  • A Si3N4-based ceramic tool material with graphene added and its preparation method
  • A Si3N4-based ceramic tool material with graphene added and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Si 3 N 4 / Graphene composite ceramic tool material, the mass percentage of raw material composition is: graphene is 0.5%, A1 2 o 3 2%, Y 2 o 3 is 4%, MgO is 2%, and the rest is Si 3 N 4 .

[0057] The preparation steps are as follows:

[0058] According to Si 3 N 4 Weigh 0.5% of the mass of polyvinylpyrrolidone (PVP, K30) into 70mL isopropanol, ultrasonically disperse and mechanically stir for 10min, until it is completely dissolved; weigh Si 3 N 4 and added to the solution, ultrasonically dispersed and mechanically stirred for 30min to obtain Si 3 N 4 Dispersions.

[0059] According to A1 2 o 3 , Y 2 o 3 and 0.5% of the total mass of MgO weighed polyvinylpyrrolidone (PVP, K30) into 50mL of isopropanol, ultrasonically dispersed and mechanically stirred for 10min, until it was completely dissolved; weighed A1 2 o 3 Add to the solution, ultrasonically disperse and mechanically stir for 10min, weigh Y 2 o 3 Add it into the solution, ultrasonically disp...

Embodiment 2

[0063] Si 3 N 4 / Graphene composite ceramic tool material, the mass percentage of raw material composition is: graphene is 1%, A1 2 o 3 2%, Y 2 o 3 is 4%, MgO is 2%, and the rest is Si 3 N 4 .

[0064] The preparation steps are as follows:

[0065] According to Si 3 N 4 Weigh 1% of the mass of polyvinylpyrrolidone (PVP, K30) into 70mL of isopropanol, ultrasonically disperse and mechanically stir for 20min, until it is completely dissolved; weigh Si 3 N 4 and added to the solution, ultrasonically dispersed and mechanically stirred for 20min to obtain Si 3 N 4 Dispersions.

[0066]According to A1 2 o 3 , Y 2 o 3 Add 1% of the total mass of MgO to polyvinylpyrrolidone (PVP, K30) and add it to 50mL of isopropanol, ultrasonically disperse and mechanically stir for 20min, until it is completely dissolved; weigh A1 2 o 3 Add to the solution, ultrasonically disperse and mechanically stir for 20min, weigh Y 2 o 3 Add it into the solution, ultrasonically disperse an...

Embodiment 3

[0070] Si 3 N 4 / Graphene composite ceramic tool material, the mass ratio of raw material composition is: graphene is 2%, A1 2 o 3 2%, Y 2 o 3 is 4%, MgO is 2%, and the rest is Si 3 N 4 .

[0071] The preparation method steps are as follows:

[0072] According to Si 3 N 4 Weigh 2% of the mass of polyvinylpyrrolidone (PVP, K30) into 70mL of isopropanol, ultrasonically disperse and mechanically stir for 30min, until it is completely dissolved; weigh Si 3 N 4 and added to the solution, ultrasonically dispersed and mechanically stirred for 10 min to obtain Si 3 N 4 Dispersions.

[0073] According to A1 2 o 3 , Y 2 o 3 Weigh polyvinylpyrrolidone (PVP, K30) and add 2% of the total mass of MgO into 50mL isopropanol, ultrasonically disperse and mechanically stir for 30min, until it is completely dissolved; weigh A1 2 o 3 Add to the solution, ultrasonically disperse and mechanically stir for 10min, weigh Y 2 o 3 Add it into the solution, ultrasonically disperse and...

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Abstract

The invention relates to a Si3N4-based ceramic cutter material with added graphene and a preparation method of the material. According to the ceramic cutter material, silicon nitride serves as a matrix, graphene serves as a reinforced phase, and MgO, Al2O3 and Y2O3 serve as composite sintering auxiliaries. The ceramic cutter material is prepared through the processes of independent dispersion of raw materials, compound dispersion, ball milling, drying and screening, cold pressing and hot pressed sintering. In the Si3N4 / graphene composite ceramic cutter material, mechanical properties of the silicon nitride ceramic cutter material are remarkably influenced by graphene, the coefficient friction of the material is reduced by adding graphene, and self-lubricating performance of the material is improved.

Description

technical field [0001] The invention relates to a ceramic material and a preparation method thereof, in particular to a Si with graphene added 3 N 4 Base ceramic cutting tool material and preparation method thereof. Background technique [0002] With the advancement of science and technology and the continuous development of industrial technology, the demand for various difficult-to-machine materials and large and complex parts is increasing, which puts forward higher and higher requirements for the machining industry: not only high hardness, high wear resistance , but also have good high temperature resistance, corrosion resistance, suitable for continuous and intermittent cutting and other requirements. Compared with traditional carbide tools, ceramic tools have high hardness and wear resistance, especially silicon nitride ceramic tools, which have good chemical stability and thermal shock resistance, and are ideal tool materials. However, the fracture toughness of sili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/584C04B35/645
CPCC04B35/593C04B35/645C04B2235/3206C04B2235/3217C04B2235/3225C04B2235/425C04B2235/96
Inventor 许崇海张玉兵肖光春衣明东陈照强
Owner QILU UNIV OF TECH
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