高温钼骨架渗铜工艺参数分析

Analysis for the Manufacturing Parameters of High-Temperature Mo-Skeleton with Copper Infiltration

钼金属粉末经过选择性激光烧结、脱脂预烧结后形成疏松结构的金属骨架。在无压真空浸渗后处理过程中,浸渗液体能够浸渗到金属骨架中主要驱动力为毛细作用力,阻力主要为凝固阻力、黏滞阻力。在建立多孔结构钼骨架等效模型的基础上分析了金属液微元体在毛细管中稳态流动过程的受力,建立平衡方程从而导出浸渗保温所需要的最低温度,利用达西定律建立金属液体浸渗速度与浸渗深度的运动微分方程,可计算出浸渗完全所需要的最少保温时间。

After Selective Laser Sintering and debinding and pre-sintering,the Mo powder form loose metallic skeletons. During the post-processes of vacuum-pressureless infiltration,the metallic liquid can infiltrate through the skeletons favoring because the primary driving force is capillary force,and the primary resistance is concreting-resistance and viscosity-resistance. After analyzing the forces of the metallic liquid Micro Cell in capillary when the Micro Cell flowing stably,can get the minimum temperature when infiltrating by establishing equilibrium equation; and can get the holding time that Infiltrating completely by establishing the differential equations of motion when the metallic liquid infiltrating.