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A kind of lamellar nitride ceramic particle and preparation method thereof

A technology of nitride ceramics and carbide particles, which is applied in the field of lamellar structure nitride ceramic particles and its preparation, can solve problems such as poor effects, and achieve the effects of facilitating industrial production, convenient preparation, and strengthening fit

Active Publication Date: 2019-12-20
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Transition metal nitride ceramics have good thermal stability, high hardness, high modulus and good electrical machinability, and have been widely obtained in the industry; for example, vanadium nitride is used as an additive for cubic boron nitride molds, niobium nitride As a cemented carbide additive, it can greatly improve the service life of tools; in addition, nitride electrodes can be used as electrode materials for supercapacitors, which have very good chemical stability; commercial nitride particles are usually irregularly shaped solid particles, and in In use, the method of mixing is used to disperse in the matrix to strengthen and toughen the matrix, but the effect is not good.

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  • A kind of lamellar nitride ceramic particle and preparation method thereof
  • A kind of lamellar nitride ceramic particle and preparation method thereof
  • A kind of lamellar nitride ceramic particle and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Lamellar vanadium nitride particles were prepared as follows

[0029] (1) Put 2gV 2 The AlC powder material was corroded in 50ml of hydrofluoric acid with a mass concentration of 47%, and corroded in an oil bath at 60°C for 20 hours to obtain lamellar carbide particles;

[0030] (2) Wash the carbide particles obtained in step (1) with deionized water until the pH value of the washing solution reaches 7, and then dry them in a vacuum oven at 60°C for 24 hours;

[0031] (3) Put the carbide particles obtained in step (2) into an alumina crucible, cover the surface of the particles with graphite paper, and then cover with a layer of graphite powder; put the crucible into the furnace under flowing high-purity nitrogen (99.9%) medium treatment for 1 hour; heat preservation treatment at 1300° C. for 1 hour, and the target product was obtained after cooling in the furnace, and the heating rate was 1° C. / min.

[0032] The obtained lamellar vanadium nitride ceramic particles ha...

Embodiment 2

[0036] Lamellar vanadium nitride particles were prepared as follows

[0037] (1) Put 5gV 2 The AlC powder material is corroded in 100ml of hydrofluoric acid with a mass concentration of 47%, and corroded in an oil bath at 40°C for 20 hours to obtain lamellar carbide particles;

[0038] (2) Wash the carbide particles obtained in step (1) with deionized water until the pH value of the washing solution reaches 7, and then dry them in a vacuum oven at 20°C for 24 hours;

[0039] (3) Put the carbide particles obtained in step (2) into an alumina crucible, cover the surface of the particles with graphite paper, and then cover with a layer of graphite powder; put the crucible into the furnace under flowing high-purity nitrogen (99.9%) medium treatment for 4 hours; heat preservation treatment at 900°C for 1 hour, and the target product was obtained after cooling in the furnace, and the heating rate was 30°C / min.

[0040] The obtained lamellar vanadium nitride ceramic particles have ...

Embodiment 3

[0042] Lamellar niobium nitride particles were prepared as follows

[0043] (1) 5gNb 2 The AlC powder material is corroded in 200ml of hydrofluoric acid with a mass concentration of 47%, and corroded in an oil bath at 50°C for 30 hours to obtain lamellar carbide particles;

[0044] (2) Wash the carbide particles obtained in step (1) with deionized water until the pH value of the washing solution reaches 7, and then dry them in a vacuum oven at 40°C for 24 hours;

[0045] (3) Put the carbide particles obtained in step (2) into an alumina crucible, cover the surface of the particles with graphite paper, and then cover with a layer of graphite powder; put the crucible into the furnace under flowing high-purity nitrogen (99.9%) medium treatment for 3 hours; 1100°C heat preservation treatment for 3 hours, after cooling with the furnace, the target product was obtained, and the heating rate was 20°C / min.

[0046] The obtained lamellar niobium nitride ceramic particles have a thick...

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Abstract

The invention discloses a lamellar nitride ceramic particle and a preparation method thereof. The nitride ceramic particle is composed of multi-layer nano crystal grains and has a laminated structure; the preparation process is as follows: (1) X n ‑Al‑C phase powder material is corroded in hydrofluoric acid with a mass concentration of 47%, and corroded for 20‑40 hours at 40‑60 °C to obtain lamellar carbide particles; (2) Step (1) ) to wash the carbide particles obtained in the washing solution until the pH value reaches 7, and then dry them; (3) put the carbide particles obtained in the step (2) into flowing nitrogen, and heat-preserve them at 900-1300°C After 1-4 hours, the target product is obtained after cooling; the nitride ceramic particles prepared by the present invention have a lamellar structure, and the matrix material can be introduced into the interlamellar gap to enhance fit and improve performance. The preparation process is simple and the production cost is low .

Description

technical field [0001] The invention relates to nitride ceramic particles and a preparation method thereof, in particular to a lamellar structure nitride ceramic particle composed of nano crystals and a preparation method thereof. Background technique [0002] Transition metal nitride ceramics have good thermal stability, high hardness, high modulus and good electrical machinability, and have been widely obtained in the industry; for example, vanadium nitride is used as an additive for cubic boron nitride molds, niobium nitride As a cemented carbide additive, it can greatly improve the service life of tools; in addition, nitride electrodes can be used as electrode materials for supercapacitors, which have very good chemical stability; commercial nitride particles are usually irregularly shaped solid particles, and in In use, the method of mixing is used to disperse in the matrix to strengthen and toughen the matrix, but the effect is not good. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/58C04B35/626
CPCC04B35/58007C04B35/626C04B2235/3817C04B2235/3839C04B2235/46
Inventor 胡春峰朱德贵许璐迪姚远思
Owner SOUTHWEST JIAOTONG UNIV