Graphene nanosheet-based toughened aluminum oxide-titanium boride composite ceramic material and preparation method thereof

A technology of graphene nanosheets and composite ceramics, applied in the field of tool materials

Inactive Publication Date: 2021-01-01
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical task of the present invention is to provide a toughened alumina-titanium boride composite ceramic material based on graphene nanosheets and its preparation method to solve how to further improve the fracture toughness and friction reduction of ceramic composite materials in the process of high-speed cutting The problem of anti-wear performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1), the Graphene of 0.2g is ultrasonically dispersed in 100ml dehydrated alcohol for 1 hour, obtains the graphene dispersion liquid of uniform dispersion;

[0035] (2), the graphene dispersion is poured into the ball mill jar that 78.8g submicron alumina, 20g titanium boride, 0.5g magnesia and 0.5g yttrium oxide are housed and high-energy ball mills 36 hours; After drying, sieving obtains composite raw powder;

[0036] (3), weigh the mixed raw powder, fill the mixed raw powder into the mold and pre-press;

[0037] (4) Put the mold into the spark plasma sintering furnace, heating rate: 100°C / min before 800°C, 80°C / min between 800°C-1200°C, 50°C / min between 1200°C-1525°C; Keep the heat at the highest temperature for 5 minutes, and the sintering pressure is 30MPa. After the heat preservation is over, cool down to room temperature with the furnace.

[0038] The mechanical properties of the graphene nanosheet toughened alumina / titanium boride composite ceramic material pr...

Embodiment 2

[0040] (1), 0.3g of graphene is ultrasonically dispersed in 100ml of absolute ethanol for 1 hour to obtain a uniformly dispersed graphene dispersion.

[0041] (2), the graphene dispersion is poured into 78.7g submicron alumina, 20g titanium boride, magnesia of 0.5g, high-energy ball milling in the ball mill tank of 0.5g yttrium oxide for 36 hours; Obtained through drying and sieving Composite raw powder;

[0042] (3), weigh the mixed raw powder, fill the mixed raw powder into the mold and pre-press;

[0043] (4) Put the mold into the spark plasma sintering furnace, heating rate: 100°C / min before 800°C, 80°C / min between 800°C-1200°C, 50°C / min between 1200°C-1525°C; Keep the heat at the highest temperature for 5 minutes, and the sintering pressure is 30MPa. After the heat preservation is over, cool down to room temperature with the furnace.

[0044] The mechanical properties of the graphene nanosheet toughened alumina / titanium boride composite ceramic material prepared by the ...

Embodiment 3

[0046] (1), the Graphene of 0.6g is ultrasonically dispersed in 100ml dehydrated alcohol for 1 hour, obtains the graphene dispersion liquid of uniform dispersion;

[0047] (2), pour the graphene dispersion into a ball mill tank equipped with 78.4g of submicron alumina, 25g of titanium boride, 0.2g of magnesia and 0.3g of yttrium oxide for 36 hours by high-energy ball milling, then dry and sieve to obtain a composite raw powder;

[0048](3), weigh the mixed raw powder, fill the mixed raw powder into the mold and pre-press;

[0049] (4) Put the mold into the spark plasma sintering furnace, heating rate: 100°C / min before 800°C, 80°C / min between 800°C-1200°C, 50°C / min between 1200°C-1525°C; Keep the heat at the highest temperature for 5 minutes, and the sintering pressure is 30MPa. After the heat preservation is over, cool down to room temperature with the furnace.

[0050] The mechanical properties of the graphene nanosheet toughened alumina / titanium boride composite ceramic ma...

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Abstract

The invention discloses a graphene nanosheet-based toughened aluminum oxide-titanium boride composite ceramic material and a preparation method thereof, belongs to the field of cutter materials, and aims to solve the technical problem of how to further improve the fracture toughness and antifriction and antiwear properties of a ceramic composite material in a high-speed cutting process. Accordingto the technical scheme, the graphene nanosheet-based toughened aluminum oxide titanium boride composite ceramic material is mainly prepared from, by weight, 70-80 parts of submicron aluminum oxide, 20-30 parts of titanium boride, 0-0.6 part of graphene and 0.4-1.5 parts of a sintering aid. The graphene nanosheet-based toughened aluminum oxide titanium boride composite ceramic material is used forpreparing cutters. The invention also discloses a preparation method of the graphene nanosheet-based toughened aluminum oxide-titanium boride composite ceramic material.

Description

technical field [0001] The invention relates to the field of tool materials, in particular to a toughened alumina-titanium boride composite ceramic material based on graphene nanosheets and a preparation method thereof. Background technique [0002] Tool materials play an indispensable role in high-speed cutting and advanced manufacturing technology, and ceramic tool materials are widely used due to their high hardness, wear resistance, high temperature resistance, and low affinity with workpiece materials to high-speed cutting of difficult-to-machine materials. However, its inherent brittleness limits its further widespread application. In order to improve the fracture toughness of ceramic composites, many studies have been carried out at home and abroad. [0003] The traditional strengthening and toughening method is to add toughening phases such as titanium boride, titanium carbide, zirconia, or titanium nitride to the ceramic matrix, and has achieved certain results, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/10C04B35/622C04B35/64C04B35/626
CPCC04B35/80C04B35/10C04B35/622C04B35/64C04B35/6264C04B35/6261C04B2235/666C04B2235/661C04B2235/6562C04B2235/3813C04B2235/425C04B2235/3225C04B2235/3206C04B2235/96
Inventor 肖光春陈本帅许崇海陈照强
Owner QILU UNIV OF TECH
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