采用定向凝固技术,在氢气或氢气和氩气的混合气氛中制备得到了藕状规则多孔Cu.通过求解稳态凝固界面前沿的溶质场,获得了氢在金属固相中的浓度分布,进而建立了气孔率计算的理论模型.考虑凝固速率和扩散系数的影响,用该模型预测的理论气孔率与实验结果很好吻合.同时也获得了Gasar凝固试样的气孔率随气体分压变化而变化的规律.
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