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Loose sintering preparation method of titanium diboride compact complex material

A composite material, titanium diboride technology, applied in the field of materials, can solve the problems of low physical and mechanical performance indicators, coarse grains of multiphase ceramics, and weaken the application range of TiB2 materials, etc., to achieve superior material performance, simple preparation method, The effect of good application prospects

Inactive Publication Date: 2011-10-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above series of silicon carbide-titanium boride composite ceramics are all processed by hot pressing or hot isostatic pressing after sintering at high temperature (2000°C). The grains of the composite ceramics are coarse (about 40 μm), which is easy to cause microscopic turtle cracks, which greatly reduces the material performance, and the physical and mechanical performance indicators are not high. At the same time, hot pressing and hot isostatic pressing make the shape of the product greatly restricted, weakening the TiB 2 Application range of materials
[0006] In addition, when the in-situ reaction is used to synthesize silicon carbide-titanium boride composite ceramics, the raw materials may not react completely, and some raw materials remain in the product, resulting in uneven composition of the prepared composite material, which greatly reduces the material performance.

Method used

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  • Loose sintering preparation method of titanium diboride compact complex material
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  • Loose sintering preparation method of titanium diboride compact complex material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] SiC powder, TiO 2 Powder, B 4 C powder, carbon powder and phenolic resin are mixed, wherein the mixing ratio is that SiC powder accounts for 25.8% by weight percentage, and TiO 2 Powder accounted for 44.47%, B 4 C powder accounts for 15.38%, carbon powder accounts for 7.02%, and phenolic resin accounts for 7.33%. The C element and B in carbon powder and phenolic resin 4 C powder, TiO 2 The weight ratio of powder is C:B 4 C powder: TiO 2 Powder=1:1.53:4.43.

[0029] Put the mixed material into a ball mill, add ethanol as the ball milling medium for ball milling, the amount of ethanol added is based on the complete immersion of the mixed material, and ball mill until the average particle size of the material is 0.5 μm; dry the ball milled material to remove ethanol , and then use a granulator to prepare granular materials with a particle size of 24-80 mesh.

[0030] The granular material was pressed into a billet under the condition of 150MPa, and the obtained bill...

Embodiment 2

[0032] SiC powder, TiO 2 Powder, B 4 C powder, carbon powder and phenolic resin are mixed, wherein the mixing ratio is SiC powder accounting for 29.26% by weight percentage, TiB 2 Powder accounted for 14.63%, TiO 2 Powder accounted for 33.63%, B 4 C powder accounts for 11.63%, carbon powder accounts for 5.31%, and phenolic resin accounts for 5.54%. The C element and B in carbon powder and phenolic resin 4 C powder, TiO 2 The weight ratio of powder is C:B 4 C powder: TiO 2 Powder=1:1.53:4.44.

[0033] Put the mixed material into a ball mill, add ethanol as the ball milling medium for ball milling, the amount of ethanol added is based on the complete immersion of the mixed material, and ball mill until the average particle size of the material is 0.6 μm; dry the ball milled material to remove ethanol , and then use a granulator to prepare granular materials with a particle size of 24-80 mesh.

[0034]The granular material was pressed into a billet under the condition of ...

Embodiment 3

[0036] SiC powder, TiO 2 Powder, B 4 C powder, carbon powder and phenolic resin are mixed, wherein the mixing ratio is SiC powder accounting for 31.84% by weight percentage, TiB 2 Powder accounted for 7.08%, TiO 2 powder accounted for 36.61%, B 4 C powder accounts for 12.66%, carbon powder accounts for 5.77%, and phenolic resin accounts for 6.04%. Element C and B in carbon powder and phenolic resin 4 C powder, TiO 2 The weight ratio of powder is C:B 4 C powder: TiO 2 Powder=1:1.54:4.44.

[0037] Put the mixed material into a ball mill, add ethanol as the ball milling medium for ball milling, the amount of ethanol added is based on the complete immersion of the mixed material, and ball mill until the average particle size of the material is 1.0 μm; dry the ball milled material to remove ethanol , and then use a granulator to prepare granular materials with a particle size of 24-80 mesh.

[0038] The granular material was pressed into a billet under the condition of 250...

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Abstract

A loose sintering preparation method of titanium diboride compact complex material belongs to the material technical field. SiC powder, TiO2 power, B4C power, C power, TiB2 power and resinous cement are blended; the blended material is ground by a ball till the average grain diameter of the material is 0.5-1.0 mum and is prepared into particle material; the particle material is press-molded into blank; the obtained blank is heated up to 1200-1400 DEG C in the vacuum condition, undergoes heat preservation for 0.5-2h, and then is heated up to 1900-2200 DEG C in the speed of 3-10 DEG C / min in the inert atmosphere and undergoes heat preservation and sintering. The preparation method is simple; the obtained material has excellent performance; therefore, the preparation method has good application prospect.

Description

technical field [0001] The invention belongs to the field of material technology, in particular to a pressureless sintering preparation method of titanium diboride dense composite material. Background technique [0002] TiB 2 Has excellent physical and chemical properties: high melting point, low density, high hardness (second only to diamond, boron nitride and boron carbide). High fracture toughness, high mechanical properties at high temperature (above 1100°C). It has stable chemical properties, is relatively inert, and has good oxidation resistance. It begins to oxidize at 800°C, but the formed oxide layer is still stable at 1200°C. Chemical corrosion resistance, strong resistance to molten metal erosion, can resist the erosion of non-alkali molten salt, excellent thermal conductivity, electrical conductivity and other characteristics. However, due to its low self-diffusion coefficient, its sinterability is poor. In terms of performance, it is characterized by brittle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/58
Inventor 茹红强邸志岗喻亮岳新艳
Owner NORTHEASTERN UNIV LIAONING