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CNT-B4C-TiB2 composite ceramic and preparation method thereof

A technology of cnt-b4c-tio2 and cnt-b4c-tib2, which is applied in the field of CNT-B4C-TiB2 composite ceramics and its preparation, can solve the problems of harsh sintering temperature and low density of composite ceramics, so as to improve performance and guarantee Toughening effect, the effect of ensuring uniform dispersion

Inactive Publication Date: 2020-04-24
赛福纳米科技(徐州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, B 4 C and TiB 2 Pressureless reaction sintering is harsh on the sintering temperature, usually not lower than 2100°C, if the temperature is lower than 1800°C, the density of the multiphase ceramics obtained by sintering is even lower than that of the compact

Method used

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  • CNT-B4C-TiB2 composite ceramic and preparation method thereof
  • CNT-B4C-TiB2 composite ceramic and preparation method thereof
  • CNT-B4C-TiB2 composite ceramic and preparation method thereof

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preparation example Construction

[0019] The embodiment of the present invention relates to a kind of CNT-B 4 C-TiB 2 The preparation method of composite ceramics comprises the following steps:

[0020] S1, mix the CNT dispersion with B 4 C nano powder, TiO 2 Mix nano powder and phenolic resin and stir evenly to get CNT-B 4 C-TiO 2 Composite slurry;

[0021] S2, CNT-B 4 C-TiO 2 The composite slurry is spray granulated to obtain CNT-B 4 C-TiO 2 Compound dry powder;

[0022] S3, the CNT-B 4 C-TiO 2 The composite dry powder is laid in the mold, compacted, and sintered in two stages under vacuum; the first stage is heated to 1500-1700°C at a rate of 5-20°C / min, and kept for 0.5-1h, and the second stage is 5- Raise the temperature to 1900-2200°C at a rate of 20°C / min and keep it for 1-2h to prepare CNT-B 4 C-TiB 2 Composite ceramics.

[0023] The CNT dispersion is obtained by mixing CNT, PVP (polyvinyl pyrrolidone, polyvinylpyrrolidone) and H 2 O mixed, obtained by ultrasonic treatment and stirring ...

Embodiment 1

[0030] This embodiment relates to a kind of CNT-B 4 C-TiB 2 The preparation method of composite ceramics comprises the following steps:

[0031] S1, CNT-B 4 C-TiO 2 Preparation of composite slurry;

[0032] S11, preparing a CNT dispersion;

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Abstract

The invention discloses a CNT-B4C-TiB2 composite ceramic and a preparation method thereof, and belongs to the technical field of composite material preparation. The preparation method of the CNT-B4C-TiB2 composite ceramic comprises the following steps: S1, a CNT dispersion liquid is mixed with B4C, TiO2 and phenolic resin, and uniformly stirring is performed to obtain CNT-B4C-TiO2 composite slurry; S2, the CNT-B4C-TiO2 composite slurry is subjected to spray granulation, and CNT-B4C-TiO2 composite dry powder is obtained; and S3, the CNT-B4C-TiO2 composite dry powder is laid in a mold, and blankpressing and forming are conducted; and then, firing is performed to obtain the CNT-B4C-TiB2 composite ceramic. By adding the CNT and adopting a staged sintering process, the toughness and hardness of the prepared composite ceramic can be improved while the sintering requirement is reduced.

Description

technical field [0001] The present invention relates to a technique in the field of composite material preparation, specifically a CNT-B 4 C-TiB 2 Composite ceramics and methods for their preparation. Background technique [0002] B 4 C ceramics have excellent physical and mechanical properties, such as low density and high strength, and are widely used in the fields of armor and nuclear energy. B 4 C is the hardest material next to diamond and cubic boron nitride, and it is brittle, so different additives are often needed to improve its sintering and mechanical properties. B 4 C-TiB 2 TiB in the composite 2 The addition of the addition of improved the size and distribution of grains and micropores, reduced porosity, and increased fracture toughness and flexural strength. However, B 4 C and TiB 2 Pressureless reaction sintering is harsh on the sintering temperature, usually not lower than 2100°C. If the temperature is lower than 1800°C, the density of the multiphas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563C04B35/80C04B35/622C04B35/626
CPCC04B35/563C04B35/622C04B35/62625C04B2235/3232C04B2235/3813C04B2235/5288C04B2235/5445C04B2235/6562C04B2235/6567C04B2235/6581
Inventor 刘媛董明
Owner 赛福纳米科技(徐州)有限公司
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