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

表1 Pb-Al体系的热物性参数^[28]

Table 1 Thermophysical property parameters of Pb-Al system^[28]

Parameter	Value	Unit
Dynamic viscosity of Pb $η^{m}$	0.0004636exp(1036.7 / T)	Pa·s
Thermal conductivity of liquid Pb $k^{m}$	15.88	W·m^-1·K^-1
Density of liquid Pb $ρ^{m}$	10670 - 1.32(T - 600.4)	kg·m^-3
Density of solid Al $ρ^{β}$	2700	kg·m^-3
Specific heat of liquid Pb $c_{p}^{m}$	127.61	J·kg^-1·K^-1
Latent heat of solidification of Pb $L$	24700	J·kg^-1
Electrical conductivity of liquid Pb $σ_{e}^{m}$	(0.0479T + 66.6)^-1	10^-8 S·m^-1
Electrical conductivity of solid Al $σ_{e}^{β}$	[15(exp(0.00057T)–1)]^-1	10^-8 S·m^-1