A kind of preparation method of single-phase carboride solid solution ceramic material

A ceramic material and boride technology, which is applied in the field of preparation of single-phase carbon boride solid solution ceramic materials, can solve the problems of low solid solubility of transition metal carbides and borides, and it is difficult to prepare transition metal carbon borides, etc. Strength and hardness improvement, effect of reducing sintering temperature

Active Publication Date: 2021-10-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that transition metal carbides and borides have low solid solubility and it is difficult to prepare transition metal carbides, the present invention provides a superhard single-phase carboride quaternary solid solution ceramics Material preparation method

Method used

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  • A kind of preparation method of single-phase carboride solid solution ceramic material
  • A kind of preparation method of single-phase carboride solid solution ceramic material

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Effect test

specific Embodiment approach 1

[0020] Specific embodiment 1: the boride is titanium boride, and the carbide is zirconium carbide

[0021] (1) Mix the titanium boride powder and the zirconium carbide powder according to the mass ratio of 85:15, and use a high-energy ball mill for ball milling. The ball milling conditions are: the ball-to-material ratio is 10:1, the ball milling time is 30h, and the rotating speed is 500r / min. Composite powder with uniform composition and fine particles;

[0022] (2) Put the composite powder in the mold and sinter in a hot-press furnace. The sintering conditions are as follows: the graphite heating body in the hot-press furnace is heated up to 2000°C at a rate of 20°C / min, kept for 1h and sintered under pressure. After the sintering is completed, the mold is cooled and demolded to obtain a single-phase carboride solid solution ceramic material (i).

[0023] Carry out XRD test to single-phase carboride solid solution ceramic material (i), test result is as follows figure 1 s...

specific Embodiment approach 2

[0026] Specific embodiment 2: the boride is titanium boride, and the carbide is zirconium carbide

[0027] (1) Mix the titanium boride powder and the zirconium carbide powder according to the mass ratio of 90:10, and use a high-energy ball mill for ball milling. The ball milling conditions are: the ball-to-material ratio is 10:1, the ball milling time is 30h, and the speed is 500r / min. Composite powder with uniform composition and fine particles;

[0028] (2) Put the composite powder in the mold and sinter in a hot-press furnace. The sintering conditions are as follows: the graphite heating body in the hot-press furnace is heated up to 2000°C at a rate of 20°C / min, kept for 1h and sintered under pressure. After the sintering is completed, the mold is cooled and demolded to obtain a single-phase carboride solid solution ceramic material (ii).

[0029] The mechanical properties of the single-phase carboride solid solution ceramic material (ii) were characterized. The results sh...

specific Embodiment approach 3

[0030] Specific embodiment 3: the boride-containing compound is titanium boride, and the carbide-containing compound is zirconium carbide

[0031] (1) Mix titanium boride powder and zirconium carbide powder according to the mass ratio of 95:5, and use a high-energy ball mill for ball milling. The ball milling conditions are: ball-to-material ratio 10:1, ball milling time 30h, speed 500r / min, to obtain Composite powder with uniform composition and fine particles;

[0032] (2) Put the composite powder in the mold and sinter in a hot-press furnace. The sintering conditions are as follows: the graphite heating body in the hot-press furnace is heated up to 2000°C at a rate of 20°C / min, kept for 1h and sintered under pressure. After the sintering is completed, the mold is cooled and demolded to obtain a single-phase carboride solid solution ceramic material (iii).

[0033] The mechanical properties of the single-phase carboride solid solution ceramic material (iii) were characteriz...

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Abstract

The invention relates to a preparation method of a single-phase carboride solid solution ceramic material, belonging to the technical field of superhard ceramic materials. The application solves the problem that the existing transition metal carbides and borides have low solid solubility, and it is difficult to prepare transition metal carborides. The invention adopts high-energy ball milling to make transition metal carbides and borides into composite powders, and then adopts discharge plasma sintering or hot-pressing sintering to prepare superhard carbon boride ceramic sintered bodies. This method utilizes high-energy ball milling to broaden the solid solubility limit of carbides in borides, solves the problem of low solid solubility between transition metal carbides and borides, and the complex powders after ball milling The solid solution strengthening effect significantly improves the strength and hardness of the sintered body; at the same time, the high-energy ball mill refines the particle size of the powder, which can effectively reduce the sintering temperature.

Description

technical field [0001] The invention relates to a preparation method of a single-phase carboride solid solution ceramic material, belonging to the technical field of superhard ceramic materials. Background technique [0002] Superhard materials are widely used in abrasives, cutting tools, wear-resistant coatings, etc. The bulletproof armor ceramics that have been studied in recent years also have high requirements on the hardness of the material. The hardest material known in nature is diamond, but diamond is expensive and difficult to process into complex shapes. Among common ceramic materials, cubic boron nitride (c-BN) has the highest hardness, exceeding 50GPa. Boron carbide (B 4 C) and its composite materials also have high hardness, generally exceeding 30GPa. But c-BN and B 4 C is a strong covalent bond compound, the self-diffusion coefficient is very low during the sintering process, and the material is difficult to sinter and form. In addition, c-BN and B 4 The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/58C04B35/626C04B35/622C04B35/645
CPCC04B35/58071C04B35/622C04B35/62615C04B35/645C04B2235/3839C04B2235/77C04B2235/96
Inventor 王玉金霍思嘉陈磊刘鑫睿陈倩倩周玉
Owner HARBIN INST OF TECH
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