Mechanically-driven Amorphization in Metallic Systems

查看全文 作　　者：Yuanda DONG Dept.of Metallurgy and Materials,Shanghai University of Technology,Shanghai,200072,China 出　　处：《Journal of Materials Science & Technology》索引1993年第9卷第3期,共6页 摘　　要：The mechanism of mechanically-driven amorphization was extensively surveyed in various systems.It was concluded that the amorphization could occur in the systems of Cu-Zr with a negative heat ofmixing (-ΔH) and Cu-Ta with a positive heat of mixing (+ΔH) by mechanical alloying of elementalpowders.Such amorphization could also be started from an intermetallic compound Cu_xZr_y with nochemical reaction involved.The energy storage by mechanical attrition should be the driving forcefor the amorphization.The atomic distribution function and nuclear resonance spectroscopic studiesshow that the mechanical alloying provides a true alloying on an atomic level.The alloys formed areof a characteristic structure common to the rapidly quenched amorphous alloys. 关 键 词：mechanically-driven amorphization METALLIC system Cu-Zr Cu-Ta