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

表2 0 K下Al _m Si _m La的形成热(

Δ_{f} H_{A l_{m} S i_{m} L a}

)和850 K时Al熔体与Al _m Si _m La间的界面能(

σ_{A l / A l_{m} S_{m} L a}

)

Table 2 Heat for the formation of Al _m Si _m La (

Δ_{f} H_{A l_{m} S i_{m} L a}

) at 0 K and interfacial energy between the melt and Al _m Si _m La compound (

σ_{A l / A l_{m} S_{m} L a}

) at 850 K

m	$Δ_{f} H_{A l_{m} S i_{m} L a}$ / (kJ·mol^-1)	$σ_{A l / A l_{m} S_{m} L a}$ / (J·m^-2)
1	-66.1	0
2	-40.3	0.021