Patent ID: 8119095
Filing Date: 2012-02-21
Classification: B22F,B82Y,C01B,C22C,Y10S

Abstract:
1. A manufacturing method of composite sintering materials using carbon nanotube comprising the steps of: manufacturing master alloys by mixing carbon nanotubes with a metal powder, wherein the metal powder is selected from the group consisting of pure iron powder, pure copper powder, iron/copper/nickel/molybdenum alloy powder, iron/phosphorous powder and iron/tin alloy powder, and heating and drying the metal power and the carbon nanotubes in an atmosphere of an inert gas; forming a predetermined form by pressing the master alloys; sintering the predetermined form in an atmosphere of nitrogen gas at a temperature of 1000˜1100° C.; generating the carbon nanotubes in the pores of a sintered product obtained through the sintering by inserting ammonia, acetylene, methane, or carbon dioxide while impregnating the sintered product to diluted HF solution, natal, or phosphoric acid, heating in a temperature less than 1200° C. and re-sintering the sintered product in which the carbon nanotubes are generated in the atmosphere of nitrogen gas.