Method for preparing ferric oxide ceramic thin film on the surface of three-dimensional network silicon carbide

A technology of networked silicon carbide and ceramic thin films is applied in the field of materials to achieve the effects of short preparation cycle, simple preparation method and cheap raw materials

Inactive Publication Date: 2009-10-14
NORTHEASTERN UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Xu Suoping and Zhu Guangjun successfully prepared α-F 2 o 3 Particles, and the research on the preparation of

Method used

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  • Method for preparing ferric oxide ceramic thin film on the surface of three-dimensional network silicon carbide
  • Method for preparing ferric oxide ceramic thin film on the surface of three-dimensional network silicon carbide
  • Method for preparing ferric oxide ceramic thin film on the surface of three-dimensional network silicon carbide

Examples

Experimental program
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Example Embodiment

[0026] Example 1

[0027] Ferric nitrate is prepared into a 0.1mol / L ferric nitrate solution, and urea is added to the solution. The molar ratio of urea is urea: iron ion = 2:1; the obtained solution is heated under stirring conditions at a stirring speed of 100 rpm , Warm up to 40°C, hold for 25min, then cool to room temperature, stand for 7h, then heat to 70°C, hold for 40min to obtain iron-containing sol.

[0028] The three-dimensional network silicon carbide is immersed in the iron-containing sol under vacuum conditions, immersed for 30 minutes, then taken out and dried at room temperature for 25 minutes, heated to 55°C for 10 minutes, and heated to 75°C for 40 minutes to complete the coating.

[0029] After coating the iron-containing sol, the three-dimensional network silicon carbide is heated to 120°C for 80 minutes, 250°C for 170 minutes, and 400°C for 200 minutes; the heating rate is 2°C / min. A uniform and dense iron oxide film is obtained on the surface of the three-dime...

Example Embodiment

[0030] Example 2

[0031] Ferric nitrate is prepared into a 0.3mol / L ferric nitrate solution, and urea is added to the solution. The molar ratio of urea is urea: iron ion = 3:1; the obtained solution is heated under stirring conditions at a stirring speed of 160rpm , Heating to 50°C, holding for 30min, then cooling to room temperature, standing for 7.5h, then heating to 80°C, holding for 30min, to obtain iron-containing sol.

[0032] The three-dimensional network silicon carbide is immersed in the iron-containing sol under vacuum conditions, immersed for 25 minutes, then taken out and dried at room temperature for 15 minutes, heated to 50°C for 15 minutes, and heated to 85°C for 30 minutes to complete the coating.

[0033] After coating the iron-containing sol, the three-dimensional network silicon carbide is heated to 140°C for 60 minutes, to 300°C for 150 minutes, and to 450°C for 170 minutes; the heating rate is 5°C / min. A uniform and dense iron oxide film is obtained on the su...

Example Embodiment

[0034] Example 3

[0035] The ferric nitrate is prepared into a 0.5mol / L ferric nitrate solution, and urea is added to the solution. The molar ratio of urea is urea: iron ion = 4:1; the obtained solution is heated under stirring conditions, and the stirring speed is 200 rpm , Warm up to 55°C, hold for 35min, then cool to room temperature, stand still for 6.5h, then heat to 95°C, hold for 20min to obtain iron-containing sol.

[0036] The three-dimensional network silicon carbide is immersed in the iron-containing sol under vacuum conditions, immersed for 20 minutes, then taken out and dried at room temperature for 10 minutes, heated to 46°C for 25 minutes, and heated to 90°C for 20 minutes to complete the coating.

[0037] After coating the iron-containing sol, the three-dimensional network silicon carbide is heated to 180°C for 50 minutes, to 340°C for 100 minutes, and to 600°C for 150 minutes; the heating rate is 8°C / min. A uniform and dense iron oxide film is obtained on the sur...

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Abstract

A method for preparing a ferric oxide ceramic thin film on the surface of three-dimensional network silicon carbide belongs to the material technical field, and comprises the following steps: (1) a sol-gel method is adopted for preparing iron sol; (2) a vacuum impregnation method is adopted for coating on 3D-SiC; and (3) the three-dimensional network silicon carbide coated by the iron sol is sintered. The invention uses the low-cost raw material, the simple preparation method and the short preparation period to prepare the uniform and compact ferric oxide ceramic thin film with low porosity on the 3D-SiC matrix surface; the thin film has stronger bonding strength with the matrix and has excellent thermal shock resistance, thus realizing to control the interface reaction of the 3D-SiC/steel.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing an iron oxide ceramic thin film on the surface of a three-dimensional network silicon carbide. Background technique [0002] Recently, a new network interpenetrating metal-ceramic composites (interpenetrating phase composites) has attracted people's attention. The characteristic of the new composite material is that the matrix and the reinforcing phase form their respective three-dimensional space continuous network structures in the whole material and are intertwined with each other. They are sometimes called C4 materials (co-continuous ceramic composites). Because the ceramic phase is used as a reinforcing phase to improve wear resistance or fracture strength, and the metal phase can improve electrical conductivity or plasticity, the C4 material has higher mechanical strength and better toughness than traditional composite materials, showin...

Claims

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Application Information

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IPC IPC(8): C04B41/87
Inventor 茹红强武艳君闫海乐马娅娜喻亮岳新艳房明
Owner NORTHEASTERN UNIV
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