COMPOSITE SINTERING MATERIALS USING CARBON NANOTUBE AND MANUFACTURING METHOD THEREOF

• US 20100051881A1
• Filed: 09/07/2007
• Published: 03/04/2010
• Est. Priority Date: 09/11/2006
• Status: Active Grant

• Current Assignee: Sang-Chul Ahn
• Original Assignee: C-Tech Company Limited (Amphenol Corporation)
• Inventors: Ahn, Sang-chul, Ahn, Hyeung-eun, Yang, Sun-hwa
• Granted Patent: US 8,119,095 B2
• Time in Patent Office: Days
• US Class Current: 252/513
• CPC Class Codes: B22F 2998/00 Supplementary information concerning processes or compositions relating to powder metallurgy
• CPC Class Codes: B22F 2998/10 Processes characterised by the sequence of their steps
• CPC Class Codes: B22F 3/02 Compacting only
• CPC Class Codes: B22F 3/10 Sintering only
• CPC Class Codes: B22F 3/1017 Multiple heating or additional steps B22F3/101 takes precedence
• CPC Class Codes: B22F 3/24 After-treatment of workpieces or articles B22F3/1146 takes precedence
• CPC Class Codes: B22F 3/26 Impregnating making ferrous alloys by impregnation C22C33/0242
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 32/16 Preparation
• CPC Class Codes: C22C 2026/002 Carbon nanotubes
• CPC Class Codes: C22C 26/00 Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
• CPC Class Codes: C22C 49/14 characterised by the fibres or filaments
• CPC Class Codes: Y10S 977/70 Nanostructure
• CPC Class Codes: Y10S 977/701 Integrated with dissimilar structures on a common substrate
• CPC Class Codes: Y10S 977/742 Carbon nanotubes, CNTs
• CPC Class Codes: Y10S 977/778 within specified host or matrix material, e.g. nanocomposite films

Abstract

The present invention relates to a composite sintering materials using a carbon nanotube (including carbide nano particles, hereinafter the same) and a manufacturing method thereof, the method comprises the steps of: combining or generating carbon 5 nanotubes in metal powers, a compacted product, or a sintered product; growing and alloying the carbon nanotubes by compacting or sintering the metal powers, the compacted product, or the sintered product; and strengthening the mechanical characteristics by repeatedly performing the sintering process and the combining process or the generating process of the carbon nanotubes. The composite sintering materials using carbon nanotubes of the present invention have excellent mechanical, thermal, and electric and electronic characteristics as well as have effects of material cost reduction and manufacturing cost reduction due to reduced sintering temperature so that they are useful as materials for automotive parts, electric and electronic parts, space and aircraft parts, and molding and cutting tools, all of which include the composite sintering materials using carbon nanotubes.

Claims

1. A manufacturing method of composite sintering materials using carbon nanotube comprising the steps of:

manufacturing master alloys by combining carbon nanotubes with metal powders;

growing or alloying the carbon nanotubes by compacting and then sintering the master alloy;

generating the carbon nanotubes (including carbide nano particles) in the pores of a sintered product or impregnating and combining the carbon nanotubes therein; and

strengthening mechanical characteristics by repeatedly performing the sintering process and the generating process of the carbon nanotubes in the sintered product or the impregnating and combining processes of the carbon nanotubes.

7. The method of claim 1, wherein the metal powder particles combining the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si powders or are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

8. The method of claim 1, wherein the matrix ingredients of the compacted product and the matrix ingredients of the sintered product impregnating the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si and are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

9. Composite sintering materials obtained by a manufacturing method of claim 1.

2. A manufacturing method of composite sintering materials using carbon nanotube comprising the steps of:

generating carbon nanotubes (including carbide nano particles) in metal powders;

growing or alloying the carbon nanotubes by compacting and then sintering the metal powders in which the carbon nanotubes are generated;

generating the carbon nanotubes in the pores of a sintered product or impregnating and combining the carbon nanotubes therein; and

strengthening mechanical characteristics by repeatedly performing the sintering process and the generating process of the carbon nanotubes in the sintered product or the impregnating and combining processes of the carbon nanotubes.

13. The method of claim 2, wherein the metal powder particles combining the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si powders or are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

3. A manufacturing method of composite sintering materials using carbon nanotube comprising the steps of:

generating carbon nanotubes (including carbide nano particles) in the pores of a compacted product after compacting metal powders or impregnating the carbon nanotubes therein to combine the metal powders with the carbon nanotubes in the pores of the compacted product;

growing or alloying the carbon nanotubes by sintering the compacted product in which the carbon nanotubes are generated or with which the carbon nanotubes are combined;

generating the carbon nanotubes in the pores of a sintered product or impregnating and combining the carbon nanotubes therein; and

strengthening mechanical characteristics by repeatedly performing the sintering process and the generating process of the carbon nanotubes in the sintered product or the impregnating and combining processes of the carbon nanotubes.

14. The method of claim 3, wherein the metal powder particles combining the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si powders or are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

4. A manufacturing method of composite sintering materials using carbon nanotube comprising the steps of:

generating carbon nanotubes (including carbide nano particles) in the pores of a finished product sintered after compacting metal powders or impregnating the carbon nanotubes therein to combine the metal powders with the carbon nanotubes in the pores of a sintered product;

growing or alloying the carbon nanotubes by resintering the sintered product in which the carbon nanotubes are generated or with which the carbon nanotubes are combined;

generating the carbon nanotubes in the pores of the sintered product or impregnating and combining the carbon nanotubes therein; and

strengthening mechanical characteristics by repeatedly performing the sintering process and the generating process of the carbon nanotubes in the sintered product or the impregnating and combining processes of the carbon nanotubes.

15. The method of claim 4, wherein the metal powder particles combining the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si powders or are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

5. A manufacturing method of composite sintering materials using carbon nanotube comprising the steps of:

manufacturing master alloys by combining carbon nanotubes (including carbide nano particles) with metal powders or generating the carbon nanotubes in metal powders;

mixing the master alloy or the metal powders, wherein the carbon nanotubes are generated, with another metal powders or ceramic materials;

growing or alloying the carbon nanotubes by compacting and then sintering the mixture;

impregnating and combining the carbon nanotubes in the pores of a sintered product or generating the carbon nanotubes therein; and

strengthening mechanical characteristics by repeatedly performing the sintering process and the generating process of the carbon nanotubes in the sintered product or the impregnating and combining processes of the carbon nanotubes.

16. The method of claim 5, wherein the metal powder particles combining the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si powders or are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

6. A manufacturing method of composite sintering materials using carbon nanotube comprising the steps of:

mixing metal powders with ceramic materials;

compacting the mixture or compacting and then sintering it;

generating and impregnating the carbon nanotubes (including carbide nano particles) in the pores of a compacted product or a sintered product or combing the carbon nanotubes therein;

growing or alloying the carbon nanotubes by sintering the compacted product; and

,

strengthening mechanical characteristics by repeatedly performing the sintering process and the generating process of the carbon nanotubes in the sintered product or the impregnating and combining processes of the carbon nanotubes.

17. The method of claim 6, wherein the metal powder particles combining the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si powders or are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

10. A manufacturing method of composite polymer materials using carbon nanotube comprising the steps of:

manufacturing master alloys by combining carbon nanotubes and metal powders or generating the carbon nanotubes (including carbide nano particles) in the metal powders;

mixing the master alloy or the metal powders wherein the carbon nanotubes are generated, with polymer materials;

growing the carbon nanotubes by melting the mixture by a heater;

injection-molding the mixed melting material; and

aging the injection-molded product.

11. The method of claim 10, wherein the metal powder particles combining the carbon nanotubes or generating the carbon nanotubes (including carbide nano particles) are Fe, Ni, Co, W, and Si powders or are alloy powders in which Fe, Ni, Co, W, and Si are alloyed.

12. Composite polymer materials obtained by the manufacturing method of claim 10.