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Aluminum-graphite-carbide composite

A carbide and composite technology, applied in the field of composites, can solve the problems of not easy high thermal conductivity composites, etc., and achieve the effect of improving fragility

Inactive Publication Date: 2019-06-07
BAY CITY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, in the SiC-added carbon-SiC composite material that has not been subjected to the extrusion process, it is not easy to obtain a composite body with high thermal conductivity.

Method used

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  • Aluminum-graphite-carbide composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Add 20 kg of titanium carbide powder with an average particle size of 1.5 μm and 10 μm of 99% powder into 100 kg of 1 mm undersize of petroleum-based needle coke, put it into a mixer kept at 130 ° C, and slowly add asphalt to obtain Pasty substance.

[0060] The obtained paste-like substance was put into a container maintained at 130° C., and extruded with a die having a square shape of 150 mm in length and 200 mm in width.

[0061] The extrudate was calcined at 1300°C for 12 hours in a non-oxidizing atmosphere, put the calcined product into a pitch tank at 200°C, covered and sealed, and applied a pressure of 0.5 MPa to carry out pitch impregnation.

[0062] After repeating the aforementioned pitch impregnation and subsequent firing at 1300°C three more times, a sample of the obtained carbon-titanium carbide molded body was cut out, and the proportion of voids was measured, and it was 19.4%.

[0063] The formed body of carbon-titanium carbide obtained above was fired a...

Embodiment 2

[0066] Using 10 kg of tantalum carbide and 10 kg of zirconium carbide instead of the titanium carbide of Example 1, a sample piece of the same size was produced from the composite in the same manner.

Embodiment 3

[0068] A composite was produced in the same manner as in Example 1 except that 25 kg of titanium oxide was added instead of the titanium carbide. Small pieces were cut out of it, finely pulverized with a mortar, and analyzed by X-ray diffraction. As a result, only graphite and titanium carbide were detected. A sample piece of the same size was also fabricated from this composite.

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Abstract

Provided are a composite having improved composite brittleness and having a suitable thermal conductivity, and a method of manufacturing the composite. This aluminum-graphite-carbide composite is manufactured through the following steps. A step of mixing coke powder or a mixed powder of coke powder and graphite powder with any of a carbide powder, an oxide powder and a metal powder; a step of adding tar or pitch to the mixed powder obtained in the previous step to prepare a paste-like substance, extrusion molding the same and then performing primary firing by firing at 1,000 to 1,500 DEG C toobtain a solid material; a step of subjecting the solid material obtained in the previous step repeatedly a plurality of times to impregnation with tar or pitch and to the step of performing primary firing by firing at 1,000 DEG C to 1,500 DEG C to obtain a solid material, and then performing final firing by firing at 2,500 DEG C to 3,000 DEG C to obtain an extrusion molding; and a step of using molten forging to pressure impregnate aluminum or an aluminum alloy into the extrusion molding obtained by the final firing.

Description

technical field [0001] The present invention relates to composite bodies, particularly composite bodies having improved fragility and suitable thermal conductivity, and methods for their manufacture. Background technique [0002] The present invention has been proposed in JP-A-2000-203973 (JP-A-3673436) regarding a metal composite material containing a carbon material (Patent Document 1). The metal composites involved in this proposal do not use materials other than carbon and metals, and therefore have the fragility of carbon itself. [0003] Then, in order to overcome this vulnerability, the present invention also proposes adding silicon carbide in addition to carbon and aluminum or aluminum alloy as a base metal in Japanese Patent Application Laid-Open No. 2009-248164 (Japanese Patent No. 5061018) (Patent Document 2 ). The disadvantage of fragility is thereby overcome. [0004] However, in the above proposal, this is done at the expense of the inherently high thermal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/00B22D18/02C04B41/88
CPCB22D18/02B22D19/00C04B35/52C04B41/88C22C1/10
Inventor 铃木信幸
Owner BAY CITY INC
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