单室Gasar工艺中抽拉速率对藕状多孔Cu气孔形貌的影响*

卓伟佳, 刘源, 李言祥

EFFECT OF WITHDRAWING RATE ON PORE MORPHOLOGY OF LOTUS-TYPE POROUS COPPER PRODUCED BY SINGLE-MOLD GASAR TECHNIQUE

ZHUO Weijia, LIU Yuan, LI Yanxiang

表1 温度场模拟中使用的参数值

Table 1 Parameters for heat transfer simulation

Parameter Value Unit Heat conductivity of graphite crucible, lgraphite 131.06-0.0425T W/(m·K) Density of graphite crucible, rgraphite 2200 kg/m3 Specific heat of graphite crucible, Cpgraphite 0.71 kJ/(kg·K) Emissivity of heater, eheater 0.98[23] Emissivity of graphite crucible, ecrucible 0.98[23] Emissivity of copper and chiller, ecopper 0.78[23] Convection heat transfer coefficient, hcrucible/gas 200* W/(m2·K) Convection heat transfer coefficient, hmelt/gas 200* W/(m2·K) Convection heat transfer coefficient, hchiller/gas 200* W/(m2·K) Interfacial heat transfer coefficient, hcrucible/solid copper 3000[24] W/(m2·K) Interfacial heat transfer coefficient, hcrucible/copper melt 5000* W/(m2·K) Interfacial heat transfer coefficient, hchiller/crucible 3000[24] W/(m2·K) Interfacial heat transfer coefficient, hchiller/water 8000[25] W/(m2·K)