论文部分内容阅读
在氢气或氢气和氩气混合的高压气氛中,采用定向凝固技术制得了规则多孔Cu。对不同直径和不同气孔率的试样进行了图像处理;计算了各可能结构的理论气孔率,并与实测值比较;计算了各结构生成吉布斯能;对比了各结构的演化完整性。结果表明,正六边形气孔率理论计算值与实测值偏差最小;正六边形结构生成吉布斯能最低;正六边形结构无空位和中断,具有完好的演化性。正六边形是规则多孔金属气孔析出的理想结构。
In a high pressure atmosphere where hydrogen or hydrogen and argon are mixed, regular porous Cu is produced by directional solidification. The samples with different diameters and different porosity were processed by image processing. The theoretical porosity of each possible structure was calculated and compared with the measured values. Gibbs energy of each structure was calculated and the evolutionary integrity of each structure was compared. The results show that the theoretical hexagonal porosity has the least deviation from the measured value, the hexagonal structure produces the lowest Gibbs energy, and the hexagonal structure has no vacancy and discontinuity with good evolution. Regular hexagons are the ideal structure for regular porous metal pores.