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Titanium silicon carbon block material using aluminium as additive and its preparing method

A technology of titanium-silicon-carbon and additives, applied in the field of titanium-silicon-carbon bulk materials and their preparation, can solve the problems of inability to prepare large-sized bulk materials, limitations, etc.

Inactive Publication Date: 2006-06-14
河北天元材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, spark plasma sintering is limited by equipment conditions, and it is not yet possible to prepare large-sized bulk materials, thus limiting the transformation of its practical technology.

Method used

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  • Titanium silicon carbon block material using aluminium as additive and its preparing method
  • Titanium silicon carbon block material using aluminium as additive and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] 35.92 g of Ti powder, 7.02 g of Si powder, 1.35 g of Al powder, 6.01 g of graphite powder, roller ball milled in absolute ethanol medium for 8 hours, dried and put into a graphite mold, pre-compression molding under 8MPa pressure, the mold Put it into a hot pressing furnace protected by flowing argon, heat up to 1450°C at a rate of 50°C / min, and keep it at a pressure of 25MPa for 120 minutes. Ti in the obtained bulk material 3 SiC 2 The volume percentage of the phase content is greater than 97.%. The X-ray diffraction analysis results are as attached figure 1 As shown, the scanning electron microscope (SEM) observation results of its microstructure are as attached figure 2 Shown.

Embodiment approach 2

[0026] 35.92 grams of Ti powder, 7.02 grams of Si powder, 1.35 grams of Al powder, 6.01 grams of graphite powder, roller ball milled in anhydrous ethanol medium for 12 hours, dried and put into a graphite mold, pre-compression molding under 8MPa pressure, the mold Put it into a hot pressing furnace protected by flowing argon, heat up to 1450°C at a rate of 20°C / min, and keep it at a pressure of 25MPa for 10 minutes. The composition and microstructure of the obtained bulk material are basically the same as those of Example 1.

Embodiment approach 3

[0028] 35.92 grams of Ti powder, 7.02 grams of Si powder, 0.68 grams of Al powder, 5.71 grams of graphite powder, roller ball milled in anhydrous ethanol medium for 6 hours, dried and put into a graphite mold, pre-compression molding under 8MPa pressure, the mold Put it into a hot-pressing furnace protected by flowing argon, heat up to 1450°C at a rate of 50°C / min, and keep the temperature at a pressure of 15MPa for 60 minutes. The composition and microstructure of the obtained bulk material are basically the same as those of Example 1.

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Abstract

A kind of titanium silicon carbon block material with aluminum as additive and preparation method thereof, material composition: titanium silicon carbon Ti 3 SiC 2 and titanium aluminum carbon Ti 3 AlC 2 The volume percentage of the total content is 97-100%; the volume percentage of the total content of titanium carbide, TiC and other impurity phases is 0-3%. Using titanium, silicon, carbon, and aluminum four element powders as raw materials, the molar ratio of Ti:Si:C:Al=3:(0.9-1.2):(1.8-2.0):(0.1-0.3) was weighed and combined The mixture is ball milled for 4-12 hours, pre-pressed under pressure of 8-10MPa, put into a hot-pressing furnace protected by flowing argon, and the furnace temperature is raised to 1400-1500 °C at a heating rate of 20-50 °C / min , under the pressure of 10-30 MPa for 5-120min. Using hot-press HP sintering, large-sized titanium-silicon-carbon bulk materials are prepared with a purity of over 97%.

Description

Technical field [0001] The invention relates to a titanium-silicon-carbon bulk material and a preparation method thereof, in particular to a titanium-silicon-carbon bulk material using aluminum as an additive and a preparation method thereof. Background technique [0002] Titanium-silicon-carbon bulk material belongs to ternary carbide ceramics, which has good electrical conductivity, fire resistance, workability and self-lubrication, and has high strength and low hardness. It can be used to make various tribological devices. , Heating elements, etc. [0003] Titanium Silicon Carbon (Ti 3 SiC 2 ) The compound was first passed TiH in 1967 by German scholars W. Jeitschko and H. Nowotny (Monatsh. Chem., 1967, 98: 329-37) 2 , Si and graphite are obtained by chemical reaction at 2000℃. In 1987, Japanese T. Goto and T. Hirai (Mater. Res. Bull., 1987, 22[9]: 1195-201) used chemical vapor deposition to obtain single-phase Ti 3 SiC 2 film. Since then, in 1996, American scholars MWBarsoum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/622
Inventor 翟洪祥周洋张志力李世波黄振莺艾明星
Owner 河北天元材料科技有限公司