Effect of barium on the refinement of primary aluminum and eutectics in a hypoeutectic Al-Si alloy  

作　　者：LI Wei, FAN Hongyuan, ZHANG Xianju, and SHEN BaoluoSchool of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China 

出　　处：《Rare Metals》2003年第3期192-196,共5页稀有金属（英文版）

基　　金：This work is financially supported by the National Natural Science Foundation of China (No. 59631080)

摘　　要：The effect of barium on the refinement of primary aluminum and on themodification of eutectics in a hypoeutectic aluminum-silicon alloy was investigated. The resultsindicate that barium not only modifies the eutectic silicon but also refines the primary aluminumand there is a relationship between the retained barium and the second spacing of primary aluminum.Experiments of barium-treated commercial Al-Si hypoeutectic alloy show that barium is a bettermodifier than sodium when there is a longer holding time.The effect of barium on the refinement of primary aluminum and on themodification of eutectics in a hypoeutectic aluminum-silicon alloy was investigated. The resultsindicate that barium not only modifies the eutectic silicon but also refines the primary aluminumand there is a relationship between the retained barium and the second spacing of primary aluminum.Experiments of barium-treated commercial Al-Si hypoeutectic alloy show that barium is a bettermodifier than sodium when there is a longer holding time.

关 键 词：non-ferrous metal barium modification primary aluminum EUTECTIC Al-Sialloy 

分 类 号：TG139[一般工业技术—材料科学与工程]