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Anisotropic graphene-toughened Al2O3 nano composite ceramic cutting tool material and preparation method thereof

A nano-composite and anisotropic technology, applied in the field of graphene toughened A12O3 nano-composite ceramic tool materials and its preparation, to achieve the effect of graphene toughening effect, convenient operation, and good comprehensive mechanical properties

Active Publication Date: 2016-10-12
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of cutting applications, there are no relevant research reports on ceramic tools with graphene added.

Method used

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  • Anisotropic graphene-toughened Al2O3 nano composite ceramic cutting tool material and preparation method thereof
  • Anisotropic graphene-toughened Al2O3 nano composite ceramic cutting tool material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] Graphene toughened Al 2 o 3 Composite ceramic material, the volume percentage of raw material components is: graphene 0.25%, Mo0.75%, Ni1.25%, MgO 0.5%, the rest is Al 2 o 3 .

[0045] The preparation method is as follows:

[0046] According to Al 2 o 3 Weigh polyethylene glycol (PEG4000) at 2% of the mass, dissolve it completely in absolute ethanol, ultrasonically disperse and mechanically stir for 10 min; weigh A1 2 o 3 And pour it into the polyethylene glycol dispersion that has been completely dissolved, ultrasonically disperse and mechanically stir for 10 minutes to obtain Al 2 o 3 -Polyethylene glycol dispersion; Al 2 o 3 -The polyethylene glycol dispersion is poured into a ball mill jar, and ball milled with cemented carbide ball YG6 for 24 hours under a nitrogen protective atmosphere, with a mass ratio of ball to material of 10:1; weigh polyvinylpyrrolidone (PVP) according to 60% of the mass of graphene , K30), make it dissolve in absolute ethanol, ul...

Embodiment 2

[0049] Graphene toughened Al 2 o 3 Composite ceramic material, the volume percentage of raw material components is: graphene 0.5%, Mo0.75%, Ni1.25%, MgO0.5%, the rest is Al 2 o 3 .

[0050] The preparation method is as follows:

[0051] According to Al 2 o 3 Weigh polyethylene glycol (PEG4000) at 2% of the mass, dissolve it completely in absolute ethanol, ultrasonically disperse and mechanically stir for 20min; weigh A1 2 o 3 and poured into the completely dissolved polyethylene glycol dispersion, ultrasonically dispersed and mechanically stirred for 20 minutes to obtain Al 2 o 3 -Polyethylene glycol dispersion; Al 2 o 3 - The polyethylene glycol dispersion is poured into a ball mill jar, and ball milled for 36 hours under a nitrogen protective atmosphere using cemented carbide ball YG6, with a mass ratio of ball to material of 12:1; weigh polyvinylpyrrolidone (PVP , K30), make it dissolve in absolute ethanol, ultrasonically disperse and mechanically stir for 20min;...

Embodiment 3

[0054] Graphene toughened Al 2 o 3 Composite ceramic material, the volume percentage of raw material components is: graphene 0.75%, Mo0.75%, Ni1.25%, MgO0.5%, the rest is Al 2 o 3 .

[0055] The preparation method is as follows:

[0056] According to Al 2 o 3 Weigh polyethylene glycol (PEG4000) at 2% of the mass, dissolve it completely in absolute ethanol, ultrasonically disperse and mechanically stir for 30min; weigh A1 2 o 3 And pour it into the polyethylene glycol dispersion that has been completely dissolved, ultrasonically disperse and mechanically stir for 30 minutes to obtain Al 2 o 3 -Polyethylene glycol dispersion; Al 2 o 3 - The polyethylene glycol dispersion is poured into a ball mill jar, and ball milled with cemented carbide ball YG6 for 48 hours under a nitrogen protective atmosphere, the mass ratio of the ball to material is 10:1; weigh polyvinylpyrrolidone (PVP) according to 70% of the mass of graphene , K30), make it dissolve in absolute ethanol, ul...

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Abstract

The invention relates to an anisotropic graphene-toughened Al2O3 nano composite ceramic cutting tool material and a preparation method thereof. According to the ceramic cutting tool material, Al2O3 is used as the matrix, graphene nanosheets are used as a reinforcement phase, and MgO, Mo and Ni are used as sintering aids. The preparation method of the ceramic cutting tool material comprises the following steps: graphene dispersion, composite powder preparation, drying and screening, cold-pressed mold filling and hot-pressed sintering. In the graphene toughened Al2O3 nano composite ceramic material, the graphene has obvious graphene toughening effects, and has obvious orientation in the matrix. The mechanical properties of the ceramic cutting tool have obvious anisotropy in the directions which are perpendicular and parallel to the hot pressing direction.

Description

technical field [0001] The invention relates to a ceramic material and a preparation method thereof, in particular to an anisotropic graphene toughened A1 2 o 3 Nanocomposite ceramic cutting tool material and its preparation method. Background technique [0002] Al 2 o 3 Ceramics have been extensively researched and applied because of their advantages such as high hardness, wear resistance, high temperature resistance, and stable chemical properties. However, as one of the ceramic materials, A1 2 o 3 The intrinsic brittleness of ceramic cutting tool materials limits its development as an excellent ceramic cutting tool material. The emergence of nanocomposite ceramic tool materials and whisker toughened ceramic tool materials is expected to solve the problem of low fracture toughness of ceramic tool materials. Therefore, for A1 2 o 3 Toughening modification of ceramic tool materials is the research A1 2 o 3 One of the hotspots of ceramic tool materials. For exampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/10
CPCC04B35/10C04B35/80C04B2235/3206C04B2235/404C04B2235/405C04B2235/425C04B2235/96
Inventor 许崇海孟祥龙肖光春衣明东陈照强
Owner QILU UNIV OF TECH
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