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Effect of Sb and Sr Addition on Corrosion Properties of Mg-5Al-2Si Alloy  

Jeon, Jongjin (School of Materials Science and Engineering, Pusan National University)
Lee, Sangwon (School of Materials Science and Engineering, Pusan National University)
Kim, Byeongho (School of Materials Science and Engineering, Pusan National University)
Park, Bonggyu (School of Materials Science and Engineering, Pusan National University)
Park, Yongho (School of Materials Science and Engineering, Pusan National University)
Park, Ikmin (School of Materials Science and Engineering, Pusan National University)
Publication Information
Korean Journal of Metals and Materials / v.46, no.5, 2008 , pp. 304-309 More about this Journal
Abstract
Magnesium alloys containing $Mg_2Si$ particles, as a promising cheap heat-resistant magnesium alloy for automobile power train parts applications, are attracting more attention of both material scientists and design engineers. Modification of the Chinese script shape $Mg_2Si$ particle is a key for using this alloy in sand or permanent mould casting. In the present work, the modification effect of Sr and Sb on the corrosion properties of the Mg-5Al-2Si alloy was investigated. Sr or Sb addition promoted the formation of fine polygonal shape $Mg_2Si$ particles by providing the nucleation sites. Sr was more effective element than Sb for shape modification of Chinese script shape $Mg_2Si$. Such improved microstructure of the modified alloy resulted in large improvement in corrosion resistance as compared to unmodified Mg-5Al-2Si alloy.
Keywords
modification; heat-resistant Mg; chinese script $Mg_2Si$; polygon $Mg_2Si$; corrosion;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 14  (Related Records In Web of Science)
Times Cited By SCOPUS : 16
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