在氢气和氩气混合气氛下,采用金属-气体共晶定向凝固法制备了具有长圆柱状孔隙结构大尺寸(圆柱直径大于140 mm)的多孔铜,在不同气压下得到了具有不同孔隙率的Gasarite铜,研究了气压对其孔隙率的影响.结果表明:当氩气分压一定且较小时,孔隙率随氢气分压的增大而减小;当氩气分压一定且较大时,孔隙率随氢气分压的增大而增大;当氢气分压一定时,孔隙率随氩气分压的增大而减小.
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