Method of producing nitride/tungsten nanocomposite powder and nitride/tungsten nanocomposite powder produced using the same

Abstract

Provided is a method of producing a nitride/tungsten nanocomposite powder. The method includes mixing nitride with tungsten or a tungsten alloy, and mechanically alloying the mixture in an inert atmosphere using a milling machine.

1 - 14 . (canceled) 
     
     
         15 . A method of producing a nitride/tungsten nanocomposite powder, comprising:
 mixing a nitride with one of tungsten and a tungsten alloy; and   mechanically alloying the mixture in an inert atmosphere using a milling machine.   
     
     
         16 . The method according to  claim 15 , wherein the nitride comprises at least one selected from the group consisting of ZrN, HfN, BN, AlN, Si 3 N 4 , TiN, TaN, Ta 2 N, VN, CrN, Cr 2 N, Mo 2 N, NbN, WN, and W 2 N. 
     
     
         17 . The method according to  claim 15 , wherein the tungsten alloy comprises tungsten and at least one element selected from the group consisting of Nb, Tc, Ru, Hf, Os, Mo, Ta, Re and Ir. 
     
     
         18 . The method according to  claim 15 , wherein the nitride and the one of tungsten and a tungsten alloy are mixed at a volume ratio (%) in a range of 0.1 to 95:5 to 99.9. 
     
     
         19 . The method according to  claim 15 , wherein the inert atmosphere comprises at least one selected from the group consisting of vacuum, nitrogen gas, and argon gas. 
     
     
         20 . The method according to  claim 15 , wherein the milling machine comprises any one selected from the group consisting of a planetary ball mill, an attritor, a stirred ball mill, and a vibration mill. 
     
     
         21 . The method according to  claim 15 , wherein the milling machine uses ball-to-ball collision. 
     
     
         22 . The method according to  claim 15 , wherein the milling machine uses ball-to-jar collision. 
     
     
         23 . The method according to  claim 15 , wherein a weight ratio of the mixture to balls of the milling machine is in the range of 1:1 to 1:50. 
     
     
         24 . The method according to  claim 15 , wherein a milling speed of the milling machine is 1 rpm to 5000 rpm. 
     
     
         25 . The method according to  claim 15 , wherein mechanically alloying the mixture comprises mechanically milling the mixture and producing a nanocomposite powder in which nitride nanoparticles are uniformly dispersed at grain boundaries of the tungsten. 
     
     
         26 . The method according to  claim 15 , wherein mechanically alloying the mixture comprises mechanically milling the mixture and producing a nanocomposite powder in which nitride nanoparticles are uniformly dispersed in grains of the tungsten. 
     
     
         27 . The method according to  claim 15 , wherein mechanically alloying the mixture comprises mechanically milling the mixture and producing a nanocomposite powder in which nitride nanoparticles are uniformly dispersed at grain boundaries of the tungsten alloy. 
     
     
         28 . The method according to  claim 15 , wherein mechanically alloying the mixture comprises mechanically milling the mixture and producing a nanocomposite powder in which nitride nanoparticles are uniformly dispersed in grains of the tungsten alloy. 
     
     
         29 . A nitride/tungsten nanocomposite powder produced by the method according to  claim 15 . 
     
     
         30 . The nitride/tungsten nanocomposite powder according to  claim 29 , wherein nitride nanoparticles are uniformly dispersed at grain boundaries of one of tungsten and a tungsten alloy. 
     
     
         31 . The nitride/tungsten nanocomposite powder according to  claim 29 , wherein nitride nanoparticles are uniformly dispersed in grains of the one of tungsten and tungsten alloy.