Method for preparing titanium subgroup carbonitride solid solution composite ceramic material by sintering

A technology of carbonitride and multi-phase ceramics, which is applied in the field of multi-phase ceramic materials, can solve the problems of poor sintering and fracture toughness of multi-phase ceramics, improve sintering compactness, improve preparation performance, and reduce cumbersome experimental steps Effect

Active Publication Date: 2022-01-14
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem of poor sinterability and fracture toughness of existing multiphase ceramics, and to provide a method for preparing titanium subgroup carbonitride solid solution multiphase ceramic materials by sintering

Method used

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  • Method for preparing titanium subgroup carbonitride solid solution composite ceramic material by sintering
  • Method for preparing titanium subgroup carbonitride solid solution composite ceramic material by sintering
  • Method for preparing titanium subgroup carbonitride solid solution composite ceramic material by sintering

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Embodiment 1

[0040] Embodiment 1: A kind of sintering method of the present embodiment prepares the method for titanium subgroup carbonitride solid solution multiphase ceramic material to carry out as follows:

[0041] Step 1: Mix 95% zirconium carbide powder (1 μm ~ 3 μm) and 5% titanium carbonitride powder (1 μm ~ 3 μm) according to mole percentage, first disperse ultrasonically at 35 kHz for 10 minutes, and then ball mill and mix under the protection of inert gas Material, the grinding ball is cemented carbide, the ball-to-material ratio is 40:1, the ball milling speed is 250rpm, the ball milling time is 24h, and the mixed powder is obtained after passing through a 200 mesh sieve;

[0042] Step 2: The mixed powder obtained in step 1 is subjected to hot pressing and sintering. First, the temperature is raised to 600°C at a heating rate of 30°C / min, then to 2000°C at a heating rate of 20°C / min, and kept at 2000°C 1h, then lower to room temperature at a rate of 20°C / min, pressurize when th...

Embodiment 2

[0043] Embodiment 2: A kind of sintering method of the present embodiment prepares the method for titanium subgroup carbonitride solid solution multiphase ceramic material to carry out as follows:

[0044] Step 1: Mix 90% zirconium carbide powder (1 μm ~ 3 μm) and 10% titanium carbonitride powder (1 μm ~ 3 μm) according to mole percentage, first disperse ultrasonically at 35 kHz for 10 minutes, and then ball mill and mix under the protection of inert gas Material, the grinding ball is cemented carbide, the ball-to-material ratio is 40:1, the ball milling speed is 250rpm, the ball milling time is 24h, and the mixed powder is obtained after passing through a 200 mesh sieve;

[0045] Step 2: The mixed powder obtained in step 1 is subjected to hot pressing and sintering. First, the temperature is raised to 600°C at a heating rate of 30°C / min, then to 2000°C at a heating rate of 20°C / min, and kept at 2000°C 1h, then lower to room temperature at a rate of 20°C / min, pressurize when t...

Embodiment 3

[0046] Embodiment 3: A kind of sintering method of this embodiment prepares the method for titanium subgroup carbonitride solid solution multiphase ceramic material to carry out according to the following steps:

[0047] Step 1: Mix 80% zirconium carbide powder (1 μm ~ 3 μm) and 20% titanium carbonitride powder (1 μm ~ 3 μm) according to mole percentage, first disperse ultrasonically at 35 kHz for 10 minutes, and then ball mill and mix under the protection of inert gas Material, the grinding ball is cemented carbide, the ball-to-material ratio is 40:1, the ball milling speed is 250rpm, the ball milling time is 24h, and the mixed powder is obtained after passing through a 200 mesh sieve;

[0048] Step 2: The mixed powder obtained in step 1 is subjected to hot pressing and sintering. First, the temperature is raised to 600°C at a heating rate of 30°C / min, then to 2000°C at a heating rate of 20°C / min, and kept at 2000°C 1h, then lower to room temperature at a rate of 20°C / min, pr...

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Abstract

The invention relates to a method for preparing a titanium subgroup carbonitride solid solution composite ceramic material by sintering. The invention belongs to the field of multiphase ceramic materials. The invention aims to solve the technical problems of poor sinterability and fracture toughness of the existing multiphase ceramic. The method comprises the following steps: step 1, mixing titanium subgroup carbide powder and titanium subgroup carbonitride powder or adding titanium subgroup carbonitride powder, ball-milling, mixing and sieving to obtain mixed powder; and step 2, carrying out spark plasma sintering or hot pressed sintering on the mixed powder obtained in the step 1 to obtain the titanium subgroup carbonitride solid solution composite ceramic material. According to the preparation method disclosed by the invention, elements in the same family are mutually used as sintering aids according to solid solution characteristics, so that the phase boundary can be enriched, the sintering performance of the titanium subfamily ceramic is improved, and the solid solution strengthening effect is achieved. Besides, after the titanium subgroup hydride is added, heat preservation is carried out in the initial stage in the sintering process, vacancy is introduced, and the density is remarkably improved.

Description

technical field [0001] The invention belongs to the field of multiphase ceramic materials, and in particular relates to a method for preparing titanium subgroup carbonitride solid solution multiphase ceramic materials by a sintering method. Background technique [0002] Due to the high melting point, high hardness, good thermal shock resistance and solid-state phase stability of titanium subgroup carbonitrides, they have great potential in ultra-high temperature applications. The density of titanium subgroup carbonitrides is lower than that of other refractory carbides such as TaC and WC, so titanium subgroup carbonitrides are good potential materials for structural components of next-generation rocket engines and hypersonic spacecraft. At the same time, it has broad application prospects in many fields such as superhard tool materials, microelectronic materials, nuclear energy storage materials and coating materials. However, due to the high covalent bond coordination char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622C04B35/63C04B35/645
CPCC04B35/5622C04B35/622C04B35/645C04B35/6303C04B2235/3856C04B2235/5436C04B2235/656C04B2235/6562C04B2235/6567C04B2235/66C04B2235/96
Inventor 魏博鑫梁岚青李学问房文斌
Owner HARBIN UNIV OF SCI & TECH
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