Titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material and preparation method thereof

A composite ceramic and zirconium boride technology, applied in the field of engineering materials, can solve the problems of poor sintering performance, low atomic self-diffusion coefficient, low fracture toughness, etc. The effect of increasing the number of worlds

Inactive Publication Date: 2014-12-17
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiB 2 It is a metalloid compound with a hexagonal C32 type structure, which is similar to the boron atomic layer structure of graphite and the electronic structure of titanium outer layer to determine the TiB 2 It has good electrical conductivity and metallic luster, so it is shaped by electrical machining; under the joint action of ionic bonds and covalent bonds, it is difficult for Ti and B to migrate during sintering, so TiB 2 The atomic self-diffusion coefficient is very low, and the sintering performance is poor. In composite ceramic materials, the defect of low fracture toughness limits its application range

Method used

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  • Titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material and preparation method thereof
  • Titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material and preparation method thereof
  • Titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] A titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material, the ceramic material is powdered TiB 2 As a matrix material, ZrB 2 It is the strengthening phase, SiC is the toughening phase ingredient, and the volume percentage of each component is: TiB 2 65.0%, ZrB 2 30.0%, SiC 5.0%.

[0034] A method for preparing the above-mentioned titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material, comprising the following steps:

[0035] Step 1: Initial Ball Grinding

[0036] TiB 2 , ZrB 2 and SiC raw materials were put into ball milling tanks respectively, using absolute ethanol as the medium, ball milling for 90 hours, and then dried at 160°C for 22 hours and then sieved to obtain fine powder for later use;

[0037] Step 2: Batching, stirring and secondary ball milling

[0038] in TiB 2 65.0%, ZrB 2 30.0% and SiC 5.0% by volume, take the refined powder obtained in step 1 for preparation, pour ...

Embodiment 2

[0043] A titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material, the ceramic material is powdered TiB 2 As a matrix material, ZrB 2 It is the strengthening phase, SiC is the toughening phase ingredient, and the volume percentage of each component is: TiB 2 55.0%, ZrB 2 40.0%, SiC 5.0%.

[0044] A method for preparing the above-mentioned titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material, comprising the following steps:

[0045] Step 1: Initial Ball Grinding

[0046] TiB 2 , ZrB 2 and SiC raw materials were put into ball milling tanks respectively, using absolute ethanol as the medium, ball milling for 100 hours, and then dried at 150°C for 24 hours and then sieved to obtain fine powder for later use;

[0047] Step 2: Batching, stirring and secondary ball milling

[0048] in TiB 2 55.0%, ZrB 2 The volume percentage of 40.0%, SiC 5.0% is prepared by taking the refined powder obtained in ...

Embodiment 3

[0053] A titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material, the ceramic material is powdered TiB 2 As a matrix material, ZrB 2 It is the strengthening phase, SiC is the toughening phase ingredient, and the volume percentage of each component is: TiB 2 85.0%, ZrB 2 10.0%, SiC 5.0%.

[0054] A method for preparing the above-mentioned titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material, comprising the following steps:

[0055] Step 1: Initial Ball Grinding

[0056] TiB 2 , ZrB 2 and SiC raw materials were put into ball milling tanks respectively, using absolute ethanol as the medium, ball milling for 110 hours, then dried at 140°C for 26 hours, and then sieved to obtain fine powder, which was set aside;

[0057] Step 2: Batching, stirring and secondary ball milling

[0058] in TiB 2 85.0%, ZrB 2 10.0% and SiC 5.0% by volume, take the refined powder obtained in step 1 for preparation, ...

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PUM

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Abstract

The invention belongs to the technical field of engineering materials and particularly relates to a titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material and a preparation method thereof. Powdery TiB2 is used as the matrix material of the ceramic material, ZrB2 is used as a strengthening phase, SiC is used as a toughening phase ingredient, wherein the percents by volume of the ingredients are as follows: 55.0-85.0% of TiB2, 10.0-40.0% of ZrB2 and 5.0% of SiC. According to the preparation method provided by the invention, a reaction film with a lubrication function is formed on the material surface through the chemical reaction of the titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material under the action of high-temperature friction, thus realizing self lubrication; and the composite ceramic material of the invention has the advantages of high strength, high bending strength, high fracture toughness and the like and can be used for the preparation of metal cutting tools, bearings, nozzles, etc.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, in particular to a titanium boride-zirconium boride-silicon carbide self-lubricating composite ceramic material and a preparation method. Background technique [0002] In boride ceramics, TiB 2 Because of its excellent properties, such as high melting point, good chemical stability, and good corrosion resistance, it can be widely used in high temperature resistant parts, wear resistant parts, corrosion resistant parts and other special requirements parts. TiB 2 It is a metalloid compound with a hexagonal C32 type structure, which is similar to the boron atomic layer structure of graphite and the electronic structure of titanium outer layer to determine the TiB 2 It has good electrical conductivity and metallic luster, so it is shaped by electrical machining; under the joint action of ionic bonds and covalent bonds, it is difficult for Ti and B to migrate during sintering,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/58C04B35/81C04B35/64
Inventor 李彬
Owner LUOYANG INST OF SCI & TECH
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