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Process for producing reaction bonded silicon carbide member

A technology of sintered silicon carbide and manufacturing method, which is applied in the direction of processing and manufacturing, manufacturing tools, ceramic molding machines, etc., and can solve the problem that large and complex shapes cannot be obtained

Inactive Publication Date: 2016-03-30
TOTO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the findings obtained by the present inventors, a reaction-sintered silicon carbide member having a large and complex shape and excellent ceramic properties such as rigidity and strength cannot be obtained even by the above method.

Method used

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  • Process for producing reaction bonded silicon carbide member
  • Process for producing reaction bonded silicon carbide member
  • Process for producing reaction bonded silicon carbide member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Raw material preparation

[0121] As raw materials, silicon carbide (SiC) with an average particle diameter of 30 μm and nylon 12 with an average particle diameter of 10 μm were used. Weighing was performed as follows so that the weight ratio (former:latter) of silicon carbide powder to nylon 12 became 100:1. 10 kg of the above-mentioned mixed powder was put into a plastic tank, and dry stirring and mixing were performed for more than 2 hours to obtain a raw material.

[0122] Forming

[0123] As the powder sintering lamination molding apparatus, a powder lamination type 3D molding apparatus (SEMplice300, manufactured by Aspect Corporation) was used. A predetermined amount of the obtained raw material was put into the raw material container so that it could be filled without unevenness. Next, the raw material container filled with the raw material is mounted on the main body of the apparatus, and then nitrogen is introduced into the molding chamber. Then, a thin lay...

Embodiment 2

[0138] A reaction-sintered silicon carbide member was produced in the same manner as in Example 1 except that the weight ratio of silicon carbide powder to nylon 12 was 100:3 to obtain the raw material. Then, in the same manner as in Example 1, silicon on the surface of the reaction-sintered silicon carbide member was removed, and various evaluations were performed after processing into a desired shape.

Embodiment 3

[0140] A reaction-sintered silicon carbide member was produced in the same manner as in Example 1 except that the weight ratio of silicon carbide powder to nylon 12 was 100:10 to obtain the raw material. Furthermore, in the same manner as in Example 1, silicon on the surface of the reaction-sintered silicon carbide member was removed, and various evaluations were performed after processing into a desired shape.

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Abstract

Disclosed is a process for producing a RBSiC member that has a large size and a complicated shape and possesses ceramic properties. The process is a Selective Laser Sintering process which includes providing a raw material containing silicon carbide particles and a binder, forming a thin layer of the raw material, and sintering the thin layer by irradiating a desired area in the thin layer with laser to form a sintered thin layer, repeating the step of forming the sintered thin layer to obtain a green body, impregnating the green body with a carbon source and curing the green body impregnated with the carbon source to give a cured body, carbonizing an organic compound component in the cured body to give a fired body, infiltrating the fired body with silicon, and subjecting the fired body to reaction sintering to give a RBSiC member, wherein the fired body contains 8% to 30% by weight of carbon.

Description

technical field [0001] The present invention relates to a method for manufacturing a reaction bonded silicon carbide (RBSiC) component. Specifically, it relates to a method of manufacturing a reaction-sintered silicon carbide member having a large and complex shape and having excellent ceramic properties by powder sintering lamination molding (Selective Laser Sintering process: SLS). Background technique [0002] Reaction-sintered silicon carbide is used as high-temperature structural members, wear-resistant members, and the like because of its excellent properties such as heat resistance, wear resistance, high rigidity, high thermal conductivity, and low thermal expansion. Furthermore, as its production method, a method of producing a molded body containing silicon carbide particles and carbon by casting molding or press molding, impregnating silicon therein, and then performing reaction sintering is widely used. [0003] For example, in Stevinson et al., SOLIDFREEFORMFABR...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/622
CPCB28B1/001B28B11/243B29C64/153B33Y10/00B33Y80/00C04B35/565C04B35/573C04B35/6269C04B2235/3821C04B2235/3826C04B2235/424C04B2235/425C04B2235/428C04B2235/48C04B2235/5436C04B2235/5472C04B2235/6026C04B2235/608C04B2235/616C04B2235/661C04B2235/665C04B2235/77C04B2235/80C04B2235/95C04B2235/96C04B2235/9615C04B35/64C04B41/0072C04B41/009C04B41/5059C04B41/82C04B41/83C04B41/87
Inventor 井出贵之安藤正美时园岳朗
Owner TOTO LTD
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