论文部分内容阅读
采用金属/气体共晶定向凝固工艺(Gasar),在不同氢气压力条件下制备了藕状多孔Cu-Cr合金,研究了氢气压力对藕状多孔Cu-Cr合金气孔结构和形貌因子的影响。结果表明,当氢气压力大于气孔形成临界压力时,随氢气压力的增大,气孔率和孔隙密度增大,而平均气孔直径缓慢减小;当氢气压力大于气体逸出临界压力时,气孔率和平均气孔直径急剧减小,而孔隙密度大幅增加;此外,随氢气压力的增加,气孔形貌因子逐渐减小。
The porous and porous Cu-Cr alloy was prepared under different hydrogen pressure conditions by gas / gas eutectic solidification process, and the effect of hydrogen pressure on the pore structure and morphology factor of the lotus-shaped porous Cu-Cr alloy was investigated. The results show that the stomatal ratio and pore density increase with the increase of hydrogen pressure and the average stomatal diameter decreases slowly when the hydrogen pressure is greater than the critical pressure of stomatal formation. When the hydrogen pressure is greater than the critical pressure of gas escape, The average stomatal diameter decreased sharply while the pore density increased sharply. In addition, the stomatal profile factor decreased with the increase of hydrogen pressure.