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Synergistic Toughening of Polycrystalline Cubic Boron Nitride with Three Dimensions Materials

A technology of cubic boron nitride and polycrystalline cubic, which is applied in the field of preparation of synergistically toughened polycrystalline cubic boron nitride with three-dimensional materials, can solve the problems of high requirements for auxiliary materials and increased costs

Active Publication Date: 2020-11-20
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a single inorganic non-metallic binder material requires a sintering temperature above 2000°C, which requires high requirements for equipment and auxiliary materials and increases costs.

Method used

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  • Synergistic Toughening of Polycrystalline Cubic Boron Nitride with Three Dimensions Materials

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preparation example Construction

[0016] A method for preparing synergistically toughened polycrystalline cubic boron nitride with three-dimensional materials of the present invention comprises the following steps:

[0017] (1) Carry out surface high-energy treatment of cubic boron nitride powder, the equipment is a high-energy ball mill, the material of the ball mill is tungsten carbide, the material of the ball is high-density cemented carbide, the rotor speed is 580 rpm, and the ball milling time is 15 hours. Material: ball = 1:17, boiled with acid to disperse;

[0018] (2) Treat the obtained cubic boron nitride powder, zero-dimensional zirconia powder, one-dimensional silicon nitride whisker and two-dimensional graphene material by mass percentage 98.7~99.2%: 0.2~0.4%: 0.1~0.3% : 0.3 ~ 0.6% weighing, put into planetary ball mill for uniform refinement, material: ball = 1: 6 ~ 9;

[0019] (3) Dry the powder, put it into a spark plasma sintering furnace and sinter it into a shape. The sintering temperature ...

Embodiment 1

[0022] (1) Carry out surface high-energy treatment of cubic boron nitride powder, the equipment is a high-energy ball mill, the material of the ball mill is tungsten carbide, the material of the ball is high-density cemented carbide, the rotor speed is 580 rpm, and the ball milling time is 15 hours. Material: ball = 1:17, boiled with acid to disperse;

[0023] (2) Weigh the cubic boron nitride powder, zero-dimensional zirconia powder, one-dimensional silicon nitride whisker and two-dimensional graphene material by mass percentage of 99.2%: 0.2%: 0.1%: 0.5%, Put it into a planetary ball mill and refine it evenly, material: ball = 1:9;

[0024] (3) Dry the powder and put it into a spark plasma sintering furnace to sinter and shape it. The sintering temperature is 1380°C, heat preservation for 5 minutes, the heating rate is 900°C / min, and the cooling rate is 50°C / min to obtain a polycrystalline cubic boron nitride material.

Embodiment 2

[0026] (1) Carry out surface high-energy treatment of cubic boron nitride powder, the equipment is a high-energy ball mill, the material of the ball mill is tungsten carbide, the material of the ball is high-density cemented carbide, the rotor speed is 580 rpm, and the ball milling time is 15 hours. Material: ball = 1:17, boiled with acid to disperse;

[0027] (2) Weigh the cubic boron nitride powder, zero-dimensional zirconia powder, one-dimensional silicon nitride whisker and two-dimensional graphene material by mass percentage 99%: 0.4%: 0.2%: 0.4% of the obtained cubic boron nitride powder, Put it into a planetary ball mill and refine it evenly, material: ball = 1:8;

[0028] (3) Dry the powder and put it into a spark plasma sintering furnace to sinter and shape it. The sintering temperature is 1450°C, heat preservation for 3 minutes, the heating rate is 900°C / min, and the cooling rate is 50°C / min to obtain polycrystalline cubic boron nitride material.

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Abstract

The invention discloses a method for preparing polycrystalline cubic boron nitride synergistically-toughened by three dimensional materials. The method comprises the following steps: performing surface energetic treatment on cubic boron nitride powder, acidifying and dispersing; weighing the treated cubic boron nitride, zero-dimensional zirconium dioxide powder, one-dimensional silicon nitride crystal whisker and two-dimensional graphene material in mass percentage, and filling into a planet ball mill for homogenizing and refining; drying and refining powder, burning and molding a discharge plasma sintering furnace to obtain a glomerocryst cubic boron nitride material.

Description

technical field [0001] The invention relates to the technical field of boron nitride preparation, in particular to a method for preparing three-dimensional materials synergistically toughening polycrystalline cubic boron nitride. Background technique [0002] Polycrystalline cubic boron nitride is used in cutting tools, abrasive tools, thermal management materials, etc. due to its superior mechanical and thermal properties. [0003] Due to the stable structure of cubic boron nitride, it is difficult to directly sinter the powder into a dense block, and it is relatively brittle. Generally, metal-based binders are often added to increase the toughness of polycrystalline cubic boron nitride. However, the chemical bond and structural composition of the binder and cubic boron nitride are quite different, and the high-temperature strength of commonly used metals such as cobalt, aluminum, and nickel cannot meet the requirements of increasingly harsh working conditions. In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/5831C04B35/622
CPCC04B35/5831C04B35/622
Inventor 董洪峰
Owner SHAANXI SCI TECH UNIV
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