亚共晶Al-Si合金中微量元素La变质共晶Si的关键影响因素

亚共晶Al-Si合金中微量元素La变质共晶Si的关键影响因素

张丽丽, 吉宗威, 赵九洲, 何杰, 江鸿翔

Key Factors Influencing Eutectic Si Modification in Al-Si Hypoeutectic Alloy by Trace La

ZHANG Lili, JI Zongwei, ZHAO Jiuzhou, HE Jie, JIANG Hongxiang

图2 La和i原子(Al或Si)间的相互作用参数Ω_La-_i 随界面处熔体中La-i二元系中La浓度 $x_{L a}^{* i}$ 的变化

Fig.2 Calculated results for the interaction parameters of La-i melt (Ω_La-_i ) as a function of La concentration in the i-M system at α-Al/melt interface( $x_{L a}^{* i}$ ) (Ω_La-Al, Ω_La-Si, and Ω_Al-Si are the interaction parameters of La-Al melt, La-Si melt, and Al-Si melt at 850 K, respectively. Inset shows the enlarged view of Ω_La-_i in the i rich corner)