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Zirconium diboride composite ceramic material and preparation method thereof

A technology of zirconium diboride and composite ceramics, applied in the field of ceramic materials, can solve problems such as difficult to meet the use requirements and low fracture toughness, achieve room temperature fracture toughness and high temperature tensile strength, enhance room temperature fracture toughness, and enhance high temperature resistance The effect of tensile strength

Inactive Publication Date: 2017-11-28
梁小利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zirconium boride composite ceramic material produced by the prior art has low fracture toughness and is difficult to meet the requirements of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A zirconium diboride composite ceramic material composed of the following raw materials in parts by weight: 64 parts of zirconium diboride powder, 25 parts of hafnium diboride powder, 12 parts of titanium silicide powder, 10 parts of cobalt powder, and 8 parts of tungsten powder , 6 parts of mullite, 5 parts of polyvinyl alcohol.

[0022] The method for preparing the zirconium diboride composite ceramic material in this embodiment includes the following steps:

[0023] 1) Weigh zirconium diboride powder, hafnium diboride powder, titanium silicide powder and mullite, and put them into a ball milling tank, use absolute ethanol as the ball milling medium, ball mill for 12 hours, and dry at 120°C for 2 hours. Obtain the first mixed powder;

[0024] 2) The mixed powder is calcined at 1000°C to obtain a pretreated powder;

[0025] 3) Weigh the cobalt powder and tungsten powder, combine the cobalt powder and tungsten powder with the pretreatment powder, and dry ball mill for 10 hours...

Embodiment 2

[0030] A zirconium diboride composite ceramic material consisting of the following raw materials in parts by weight: 68 parts of zirconium diboride powder, 30 parts of hafnium diboride powder, 16 parts of titanium silicide powder, 15 parts of cobalt powder, and 12 parts of tungsten powder , 10 parts of mullite, 10 parts of polyvinyl alcohol.

[0031] The method for preparing the zirconium diboride composite ceramic material in this embodiment includes the following steps:

[0032] 1) Weigh zirconium diboride powder, hafnium diboride powder, titanium silicide powder and mullite, and put them into a ball milling tank, use absolute ethanol as the ball milling medium, ball mill for 15 hours, and dry at 130°C for 4 hours. Obtain the first mixed powder;

[0033] 2) The mixed powder is calcined at 1050°C to obtain a pretreated powder;

[0034] 3) Weigh cobalt powder and tungsten powder, combine the cobalt powder and tungsten powder with the pretreatment powder, and dry ball mill for 13 hour...

Embodiment 3

[0039] A zirconium diboride composite ceramic material consisting of the following raw materials in parts by weight: 66 parts of zirconium diboride powder, 27 parts of hafnium diboride powder, 14 parts of titanium silicide powder, 13 parts of cobalt powder, and 10 parts of tungsten powder , 8 parts of mullite, 7 parts of polyvinyl alcohol.

[0040] The method for preparing the zirconium diboride composite ceramic material in this embodiment includes the following steps:

[0041] 1) Weigh zirconium diboride powder, hafnium diboride powder, titanium silicide powder, and mullite, and put them in a ball milling tank, use absolute ethanol as the ball milling medium, ball mill for 13 hours, and dry at 125°C for 3 hours. Obtain the first mixed powder;

[0042] 2) The mixed powder is calcined at 1025°C to obtain the pretreated powder;

[0043] 3) Weigh the cobalt powder and tungsten powder, combine the cobalt powder and tungsten powder with the pretreatment powder, and dry ball mill for 12 h...

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Abstract

The invention discloses a zirconium diboride composite ceramic material. The zirconium diboride composite ceramic material is prepared from raw materials in parts by weight as follows: 64-68 parts of zirconium diboride powder, 25-30 parts of hafnium diboride powder, 12-16 parts of titanium silicide powder, 10-15 parts of cobalt powder, 8-12 parts of tungsten powder, 6-10 parts of mullite and 5-10 parts of polyvinyl alcohol. The invention further provides a preparation method of the zirconium diboride composite ceramic material. The prepared zirconium diboride composite ceramic material has the breaking tenacity at 20 DEG C of 15.28-17.35 Pa*ml / 2, has the tensile strength at 1,600 DEG C of 236-253 MPa and shows excellent normal-temperature breaking tenacity and high-temperature tensile strength. The normal-temperature breaking tenacity and high-temperature tensile strength of the zirconium diboride composite ceramic material can be enhanced by adding the titanium silicide powder and the cobalt powder to the zirconium diboride composite ceramic material.

Description

[0001] This application is application number: 2016100215479, application date: January 11, 2016, title of invention: a divisional application of a zirconium diboride composite ceramic material and its preparation method. Technical field [0002] The invention relates to the technical field of ceramic materials, in particular to a zirconium diboride composite ceramic material and a preparation method thereof. Background technique [0003] With the development of modern science and technology, many new ceramic varieties have appeared in the past century. They no longer use or rarely use traditional ceramic raw materials such as clay, feldspar, and quartz, but use other special raw materials, and even expand to the range of non-silicate and non-oxide, and many new processes have appeared. The literature in the United States and some European countries has understood the term "Ceramic" as a general term for various inorganic non-metallic solid materials. Therefore, the meaning of ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/14C22C1/05C22C1/10
CPCC22C1/051C22C29/14
Inventor 不公告发明人
Owner 梁小利
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