脉冲电流作用下<strong>Pb-Al</strong>合金的液<strong>-</strong>固分相过程

脉冲电流作用下Pb-Al合金的液-固分相过程

李彦强, 赵九洲, 江鸿翔, 张丽丽, 何杰

Liquid-Solid Phase Separation Process of Pb-Al Alloy Under the Effect of Electric Current Pulses

LI Yanqiang, ZHAO Jiuzhou, JIANG Hongxiang, ZHANG Lili, HE Jie

图6 不施加脉冲电流时Pb-0.15Al合金凝固界面前沿中心轴线处基体熔体过冷度( $Δ T$ )、过饱和度( $S$ )，Al粒子形核率( $I$ )、数量密度( $N$ )及平均半径( $\bar{R}$ )沿z轴变化曲线

Fig.6 Supercooling ( $Δ T$ ) and supersaturation ( $S$ ) of the matrix melt, and nucleation rate ( $I$ ), number density ( $N$ ), and average radius ( $\bar{R}$ ) of the Al-rich particles in front of the solidification interface along the central $z$ axis for Pb-0.15Al alloys solidified without ECPs (a), and the enlargement of the microstructure evolution in the nucleation region of the Al-rich particles (b)