| 摘要 |
PURPOSE: A fabrication method of nanocrystalline titanium nitride/titanium-metal compound composite powder by forming titanium nitride and titanium intermetallic compound by reaction milling using titanium and metal nitride as raw material powder is provided. CONSTITUTION: The method comprises the processes of mixing titanium (Ti) powder having purity of 95% or more and particle size of 100 nm or less with metal nitride powder having purity of 95% or more and particle size of 50 nm or less in a mole ratio of 1:1 to 20:1; injecting the mixture along with balls having diameter of 5 to 30 mm into a reaction jar; introducing argon (Ar), nitrogen or air into a reaction chamber; and performing high energy ball milling on the mixture, wherein the metal nitride is selected from boron nitride (BN), silicon nitride (Si3N4) and aluminum nitride (AlN), wherein the reaction chamber and balls are made of tool steel, stainless steel, hard metal or zirconia, wherein the mixture and balls are injected into the reaction chamber in a weight ratio of 1:1 to 1:100, wherein the milling process is performed using shaker mill, planetary mill or attritor mill, wherein particle size of powder formed by the reaction milling is 10 nm or less, and wherein the milling process is performed for 1 to 48 hours.
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