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Preparation technology of graphene oxide toughened alumina-based ceramic cutter

A preparation process and alumina technology, applied in the field of ceramic cutting tools, can solve the problems of discount of toughening effect, difficult dispersion of lamellae, etc., and achieve the effects of stable and uniform structure, increased strength and improved strength.

Inactive Publication Date: 2020-04-10
安徽予初网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this invention, although graphene has a good toughening effect, there is a strong van der Waals force between the graphene sheets, and it is difficult to achieve good dispersion between the sheets, thereby greatly reducing the toughening effect.

Method used

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  • Preparation technology of graphene oxide toughened alumina-based ceramic cutter
  • Preparation technology of graphene oxide toughened alumina-based ceramic cutter

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation process for graphene oxide toughened alumina-based ceramic cutter, comprising the following steps:

[0031] (1) Add 0.7 parts of graphene oxide to absolute ethanol, add polyethylene glycol 4000 after mechanical stirring for 12 minutes, add 70 parts of α-alumina powder after mechanical stirring for 20 minutes, and perform ultrasonic vibration and mechanical stirring for 35 minutes at the same time , to get powder slurry I, the content of Polyethylene Glycol 4000 in the powder slurry I is 28g / L;

[0032] The thickness of graphene oxide is 1-3nm; the average particle size of α-alumina powder is 300nm.

[0033](2) Mix absolute ethanol with polyethylene glycol 2000, perform ultrasonic vibration and mechanical stirring at the same time, add 15 parts of β-SiC nanoparticles and 15 parts of TiC whiskers after 18 minutes, and carry out ultrasonic vibration and mechanical stirring for 50 minutes at the same time, Add 1 part of sintering aid, and carry out ultrasonic...

Embodiment 2

[0041] A preparation process for graphene oxide toughened alumina-based ceramic cutter, comprising the following steps:

[0042] (1) Add 0.5 parts of graphene oxide to absolute ethanol, add polyethylene glycol 5000 after mechanical stirring for 15 minutes, add 70 parts of α-alumina powder after mechanical stirring for 18 minutes, and perform ultrasonic vibration and mechanical stirring for 40 minutes at the same time , to get powder slurry I, the content of polyethylene glycol 5000 in the powder slurry I is 30g / L;

[0043] The thickness of graphene oxide is 0.5-2nm; the average particle size of α-alumina powder is 400nm.

[0044] (2) Mix absolute ethanol with polyethylene glycol 2000, perform ultrasonic vibration and mechanical stirring at the same time, add 15 parts of β-SiC nanoparticles and 13 parts of TiC whiskers after 15 minutes, and carry out ultrasonic vibration and mechanical stirring for 60 minutes at the same time, Add 0.7 part of sintering aid, and carry out ultra...

Embodiment 3

[0052] A preparation process for graphene oxide toughened alumina-based ceramic cutter, comprising the following steps:

[0053] (1) Add 0.3 parts of graphene oxide to absolute ethanol, add polyethylene glycol 4000 after mechanical stirring for 10 minutes, add 60 parts of α-alumina powder after mechanical stirring for 15 minutes, and perform ultrasonic vibration and mechanical stirring for 30 minutes at the same time , to get powder slurry I, the content of Polyethylene Glycol 4000 in the powder slurry I is 22g / L;

[0054] The thickness of graphene oxide is 3-5nm; the average particle size of α-alumina powder is 200nm.

[0055] (2) Mix absolute ethanol with polyethylene glycol 3000, perform ultrasonic vibration and mechanical stirring at the same time, add 10 parts of β-SiC nanoparticles and 18 parts of TiC whiskers after 20 minutes, and perform ultrasonic vibration and mechanical stirring for 40 minutes at the same time, Add 1.3 parts of sintering aid, and carry out ultrason...

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Abstract

The invention provides a preparation technology of a graphene oxide toughened alumina-based ceramic cutter, and relates to the technical field of ceramic cutters. The preparation technology comprisesthe following steps: (1) adding graphene oxide into anhydrous ethanol, and adding polyethylene glycol and alumina powder to obtain a powder slurry I; (2) mixing anhydrous ethanol with polyethylene glycol, and adding beta-SiC nanoparticles, TiC whiskers and a sintering aid to obtain a powder slurry II; (3) performing ball milling to obtain a composite slurry; (4) drying and sieving the composite slurry to obtain a composite powder; (5) carrying out pre-pressing forming; and (6) carrying out vacuum hot-pressing sintering on the obtained pre-pressed green body. The graphene, TiC whiskers and beta-SiC nano-particles have synergistic effects, so the reinforcing and toughening effects are good, the dispersity of all the raw materials in the preparation process is high, and the prepared ceramic cutter has excellent mechanical properties, high toughness and strength and good wear resistance.

Description

technical field [0001] The invention relates to the technical field of ceramic cutting tools, in particular to a preparation process of graphene oxide toughened alumina-based ceramic cutting tools. Background technique [0002] Alumina-based ceramic tool materials are widely used in the field of cutting processing due to their excellent performance and relatively low preparation cost. al 2 o 3 Base ceramic cutting tools can be divided into: (1) pure alumina ceramics, when Al 2 o 3 When the content in the material is as high as 99.99% and above, the material is white, so it is commonly known as white ceramics. (2) Alumina-carbide composite ceramics, Al 2 o 3 This is the type of ceramics that are hot-pressed and sintered after adding carbides to the matrix. Common carbides are TiC, Mo 2 C, WC, etc. (3) Alumina-TiC-metal composite ceramics, adding metal particles, such as Ni, Mo, etc., to alumina-TiC composite ceramics, thereby improving the connection strength between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/81C04B35/622C04B35/626C04B35/645
CPCC04B35/117C04B35/622C04B35/6261C04B35/62625C04B35/645C04B2235/3206C04B2235/3208C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3834C04B2235/3843C04B2235/425C04B2235/5276C04B2235/5445C04B2235/5454C04B2235/656C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/96
Inventor 胡宏武
Owner 安徽予初网络科技有限公司
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