발간논문

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Vol.36, No.1, 104 ~ 110, 1998
Title
Synthesis of Ultrafine W / Cu Composite Alloy by Mechanochemical Process
이길근 , 하국현 , 김병기 , 이동환 Gil Geun Lee , Gook Hyun Ha , Byoung Kee Kim , Dong Won Lee
Abstract
The possibility to obtain high density ultrafine W/Cu composite alloy with ultrafine microstructure without addition of sintering activator by chemical processing method using metallic salts as starting material is investigated in this study. Nanostructure W/Cu composite powder which is loosely agglomerated homogeneous clusters of nanoscale size W and Cu particles can be obtained by thermochemical process. Thermochemically synthesized W-/Cu-metal composite powder passed through milling process shows higher sinterability than un-milled powder. It knows that combination of thermochemical process and mechanical process was useful method to obtain high density W/Cu composite alloy with ultrafine microstructure. W-/Cu-metal composite powder reduced by the multi-step reduction process of mechanochemically synthesized W-/Cu-oxide composite powder shows higher sinterability than reduced powder by the one-step reduction process. W-20wt.%Cu composite alloy has average W particle size 1㎛ and relative density 98% can be obtained without addition of sintering activator by combination of mechanochemical process and liquid phase sintering method.
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