Patent ID: 8562938
Filing Date: 2013-10-22
Classification: B22F,B82Y,C01B,C22C,Y10S

Abstract:
1. A method of manufacturing composite sintering materials using carbon nanotubes, comprising: compacting one metal powder 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 to obtain a predetermined form; heating the predetermined form in an atmosphere of nitrogen gas for sintering; uniformly spraying a diluted HF solution, nital, diluted sulfuric acid, or diluted phosphoric acid to a sintered product obtained by the sintering; injecting ammonia gas to the product, to which the diluted HF solution, nital, diluted sulfuric acid, or diluted phosphoric acid has been sprayed, while maintaining an appropriate temperature, to generate carbon nano tubes; injecting acetylene gas, methane gas, or carbon dioxide gas to combine the generated carbon nano tubes to the metal powder for further generating the carbon nano tubes; and re-sintering the sintered product in the atmosphere of nitrogen gas to grow the generated carbon nano tubes.