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Vol.30, No.1, 104 ~ 111, 1992
Title
Amorphization Process of the Cu50Ti50 Powders by Mechanical Alloying
김익준Ick Jun Kim, 박익민Ik Min Park, 권해욱Hae Wook Kwon
Abstract
Polycrystalline powders containing 50at% Cu and 50at% Ti have been mechanically alloyed by using rotatory ball mill under the Ar atmosphere. The microstructural change of the Cu_50Ti_50 powder with milling time can be divided into four steps such as initial, cold welding, equiaxed particle formation and steady state periods. The microhardness was increased with milling time and reached about Hv 300 after the steady state. The size of crystallite was decreased at decreased rate with machanical alloying. The amorphization started at the steady state period and completed after about 30 hrs. of milling. The amorphous phase with CuTi composition was obtained.
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