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Crack self-healing ceramic tool material and preparation method thereof

A self-healing technology for ceramic knives, applied in the field of ceramic knives materials, to achieve the effect of improving mechanical properties, improving service life and safety, and shortening the cycle

Active Publication Date: 2019-10-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned patents also have certain deficiencies. For example, the heat treatment temperature of SiC material needs to be 1000-1300°C, and the lower the heat treatment temperature, the longer the time required.

Method used

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  • Crack self-healing ceramic tool material and preparation method thereof
  • Crack self-healing ceramic tool material and preparation method thereof
  • Crack self-healing ceramic tool material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A crack self-healing ceramic tool material, raw material composition volume percentage: α-Al 2 o 3 62.65 parts, TiC26.85 parts, TiB 2 10 parts, MgO 0.5 parts.

[0043] Weigh TiB in proportion 2 Powder, take polyethylene glycol (PEG4000) with a molecular weight of 4000 as a dispersant, add an appropriate amount of absolute ethanol, ultrasonically disperse and mechanically stir for 20-30min, and make TiB 2 Suspension; then weigh α-Al in proportion 2 o 3 and TiC powder, add an appropriate amount of absolute ethanol as the dispersion medium, ultrasonically disperse and mechanically stir for 20-30min, and make α-Al 2 o 3 Suspension and TiC suspension; mix the above three suspensions to obtain a multi-phase suspension, then add MgO powder in proportion, ultrasonically disperse and mechanically stir for 30 minutes; pour the resulting final suspension into a ball mill tank, and Add cemented carbide balls at a ratio of 10:1, and conduct ball milling with nitrogen as a p...

Embodiment 2

[0046] A crack self-healing ceramic tool material, raw material composition volume percentage: α-Al 2 o 3 59.15 parts, TiC25.35 parts, TiB 2 15 parts, MgO 0.5 parts.

[0047] Weigh TiB in proportion 2 Powder, take polyethylene glycol (PEG4000) with a molecular weight of 4000 as a dispersant, add an appropriate amount of absolute ethanol, ultrasonically disperse and mechanically stir for 20-30min, and make TiB 2 Suspension; then weigh α-Al in proportion 2 o 3 and TiC powder, add an appropriate amount of absolute ethanol as the dispersion medium, ultrasonically disperse and mechanically stir for 20-30min, and make α-Al 2 o 3 Suspension and TiC suspension; mix the above three suspensions to obtain a multi-phase suspension, then add MgO powder in proportion, ultrasonically disperse and mechanically stir for 40 minutes; pour the resulting final suspension into a ball mill tank, and Add cemented carbide balls at a ratio of 15:1, and conduct ball milling with nitrogen as a p...

Embodiment 3

[0050] A crack self-healing ceramic tool material, raw material composition volume percentage: α-Al 2 o 3 62.65 parts, TiC26.85 parts, TiB 2 10 parts, MgO 0.5 parts.

[0051] Weigh TiB in proportion 2 Powder, take polyethylene glycol (PEG4000) with a molecular weight of 4000 as a dispersant, add an appropriate amount of absolute ethanol, ultrasonically disperse and mechanically stir for 20-30min, and make TiB 2 Suspension; then weigh α-Al in proportion 2 o 3 and TiC powder, add an appropriate amount of absolute ethanol as the dispersion medium, ultrasonically disperse and mechanically stir for 20-30min, and make α-Al 2 o 3 Suspension and TiC suspension; mix the above three suspensions to obtain a multi-phase suspension, then add MgO powder in proportion, ultrasonically disperse and mechanically stir for 30 minutes; pour the resulting final suspension into a ball mill tank, and Add cemented carbide balls at a ratio of 10:1, and conduct ball milling with nitrogen as a p...

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Abstract

The invention relates to a crack self-healing ceramic tool material and a preparation method thereof. The crack self-healing ceramic tool material comprises the following materials in parts by volume:50 to 74 parts of a matrix material, 12 to 40 parts of titanium carbide, 3 to 18 parts of titanium boride and 0.2 to 1 part of magnesium oxide, wherein the matrix material is alpha-phase alumina (alpha-Al2O3) or ZrO2. TiB2 powder is mixed with polyethylene glycol and absolute ethanol to obtain a TiB2 suspension; the matrix material and TiC powder are respectively added into the absolute ethanol to obtain a matrix material suspension and a TiC suspension respectively; the TiB2 suspension is mixed with the matrix material suspension and the TiC suspension to obtain a multiphase suspension, andMgO powder is added to obtain a final suspension; the final suspension is subjected to ball-milling in a protective atmosphere, and performing vacuum drying and vacuum hot pressed sintering to obtainthe crack self-healing ceramic tool material. A prepared ceramic tool has the characteristics of being automatically healing after cracks appear, short in healing time and high in high-temperature healing rate.

Description

technical field [0001] The invention belongs to the technical field of ceramic cutter materials, and in particular relates to a crack self-healing ceramic cutter material and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Ceramic materials have better performance than metal materials at high temperatures. However, ceramics have fatal shortcomings, such as high brittleness, sensitivity to crack defects, and poor structural reliability. Therefore, the large-scale development and wide application of ceramic materials are limited. The common sources of cracks in ceramic materials include very small scratches on the surface of the material, int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/49C04B35/645
CPCC04B35/10C04B35/49C04B35/645C04B2235/3843C04B2235/3813C04B2235/3206C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/96C04B2235/95C04B2235/3409C04B2235/422
Inventor 陈照强季良刚郭念升许崇海张帅李琦
Owner QILU UNIV OF TECH
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