발간논문

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Vol.34, No.7, 886 ~ 896, 1996
Title
Research Paper - Powder Metallurgy - : Mechanical Alloying Behaviors of the Ni50Ti50 System by Pulverization
이우성W . S . Lee, 김승철S . C . Kim, 윤우영W . Y . Yoon, 권숙인S . I . Kwun
Abstract
A new MA processing method has been suggested using a pulverizer. Even in the pulverizer. the real atomic alloying process could happen and the five MA stages were also observed. Because of high efficiency of energy input to specimen, however, the period of each stage was shortened. The energy input to specimen during pulverizing process has been estimated quantitatively, and the necessary condition for vitrification of the Ni_(50)Ti_(50) system was expressed with energetic terms. As pulverization proceeded, the N_(50)Ti_(50) powders transformed to metallic glass followed by intemetallic crystals. Though the crystallization behavior could be rationalized by thermal effect during pulverizing, the exact mechanism needs further elaborate works.
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