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Si3N4/TiC/graphene composite ceramic cutter material with mechanical aeolotropy and preparation method thereof

A graphene composite and anisotropic technology, which is applied in the field of Si3N4/TiC/graphene composite ceramic tool materials and its preparation, can solve the problem that the matrix is ​​not tightly bonded, and the performance of anisotropy in the mechanical properties of ceramic materials has not been paid attention to. Satisfies the problems of structural parts and achieves the effect of good fracture toughness and flexural strength

Active Publication Date: 2016-11-23
QILU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But 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
On the other hand, in the various toughening and strengthening research results reported in the prior art, although the toughness or strength of the obtained ceramics has increased, they have not paid attention to the performance of anisotropy in the mechanical properties of ceramic materials, and cannot satisfy the requirements for different mechanical properties. Demand for structural members with different requirements in direction

Method used

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  • Si3N4/TiC/graphene composite ceramic cutter material with mechanical aeolotropy and preparation method thereof
  • Si3N4/TiC/graphene composite ceramic cutter material with mechanical aeolotropy and preparation method thereof
  • Si3N4/TiC/graphene composite ceramic cutter material with mechanical aeolotropy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0060] Si 3 N 4 / TiC / graphene composite ceramic tool material, the mass percentage of raw material composition is: graphene is 0.5%, TiC is 15%, A1 2 O 3 2%, Y 2 O 3 is 5%, MgO is 0.5%, and the rest is Si 3 N 4 .

[0061] The preparation method steps are as follows:

[0062] According to Si 3 N 4 0.5% of the mass of polyvinylpyrrolidone (PVP, K30) was added to isopropanol, ultrasonically dispersed and mechanically stirred for 10 min, until it was completely dissolved; weighed Si 3 N 4 and added to the solution, ultrasonically dispersed and mechanically stirred for 30 min to obtain Si 3 N 4 Dispersions. According to 0.5% of the mass of TiC, polyvinylpyrrolidone (PVP, K30) was weighed and added to isopropanol, ultrasonically dispersed and mechanically stirred for 10 minutes until it was completely dissolved; TiC was weighed and added to the solution, ultrasonically dispersed and mechanically stirred for 30 minutes , to obtain a TiC dispersion. Follow A1 2 O 3 , ...

Embodiment 2

[0065] Si 3 N 4 / TiC / graphene composite ceramic tool material, the raw material composition mass ratio is: graphene is 1%, TiC is 15%, A1 2 O 3 2%, Y 2 O 3 is 5%, MgO is 0.5%, and the remainder is Si 3 N 4 .

[0066] The preparation method steps are as follows:

[0067] According to Si 3 N 4 1% of the mass of polyvinylpyrrolidone (PVP, K30) was added to isopropanol, ultrasonically dispersed and mechanically stirred for 20min until it was completely dissolved; weighed Si 3 N 4 and added to the solution, ultrasonically dispersed and mechanically stirred for 20 min to obtain Si 3 N 4 Dispersions. According to 1% of the mass of TiC, polyvinylpyrrolidone (PVP, K30) was weighed and added to isopropanol, ultrasonically dispersed and mechanically stirred for 20 minutes, until it was completely dissolved; TiC was weighed and added to the solution, ultrasonically dispersed and mechanically stirred for 20 minutes , to obtain a TiC dispersion. Follow A1 2 O 3 , Y 2 O 3 ...

Embodiment 3

[0070] Si 3 N 4 / TiC / graphene composite ceramic tool material, the raw material composition mass ratio is: graphene is 1.5%, TiC is 15%, A1 2 O 3 2%, Y 2 O 3 is 5%, MgO is 0.5%, and the remainder is Si 3 N 4 .

[0071] The preparation method steps are as follows:

[0072] According to Si 3 N 4 1.5% of the mass of polyvinylpyrrolidone (PVP, K30) was added to isopropanol, ultrasonically dispersed and mechanically stirred for 30min, until it was completely dissolved; weighed Si 3 N 4 and added to the solution, ultrasonically dispersed and mechanically stirred for 10 min to obtain Si 3 N 4 Dispersions. According to 1.5% of the mass of TiC, polyvinylpyrrolidone (PVP, K30) was weighed and added to isopropanol, ultrasonically dispersed and mechanically stirred for 30 minutes until it was completely dissolved; TiC was weighed and added to the solution, ultrasonically dispersed and mechanically stirred for 10 minutes , to obtain a TiC dispersion. Follow A1 2 O 3 , Y 2...

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Abstract

The invention relates to a Si3N4 / TiC / graphene composite ceramic cutter material with mechanical aeolotropy and a preparation method thereof. In the ceramic cutter material, silicon nitride serves as a matrix, TiC is a hard phase while graphene is a toughening phase, and MgO, Al2O3 and Y2O3 are adopted as composite sintering aids; and the ceramic cutter material is prepared by the processes of independent dispersion, composite dispersion, ball milling, drying and screening and hot-pressing sintering of the raw materials. According to the invention, in the prepared Si3N4 / TiC / graphene composite ceramic cutter material, the graphene realizes an obvious toughening and reinforcing effect on the ceramic cutter material; and due to the oriental distribution of the graphene in the material, the mechanical properties of the Si3N4-based composite ceramic cutter material have aeolotropy. Moreover, by adding graphene, the friction coefficient of the composite ceramic cutter material is reduced, and the wear resistance is improved.

Description

technical field [0001] The invention relates to a ceramic cutting tool material and a preparation method thereof, in particular to a Si with mechanical anisotropy 3 N 4 / TiC / graphene composite ceramic tool material and preparation method thereof. Background technique [0002] With the development and progress of science, machining is developing in the direction of high-speed and high-efficiency machining, especially the continuous emergence of difficult-to-machine materials, which puts forward higher and higher requirements for the performance of cutting tools. The performance of the tool depends to a large extent on the properties of the tool material. Due to the high hardness, corrosion resistance, wear resistance and good chemical stability of ceramic tool materials, they have received extensive attention from researchers. As a kind of ceramic material, in addition to the above characteristics, silicon nitride ceramic tools have good red hardness so that they can still...

Claims

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Application Information

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IPC IPC(8): C04B35/584C04B35/645
CPCC04B35/593C04B35/645C04B2235/3206C04B2235/3225C04B2235/3843C04B2235/425C04B2235/96
Inventor 许崇海张玉兵衣明东肖光春陈照强
Owner QILU UNIV OF TECH
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