梯度金属多孔材料孔结构研究

Study on the Pore Structure of Graded-Porous Metal

利用离心沉积技术在多孔管内壁上制备了不同粒度的镍和不锈钢多孔梯度层,研究不同粒度的粉末以及梯度层厚度对梯度层孔隙性能的影响。结果表明,梯度层透气系数与中流量孔在梯度层粒度为5μm以下急剧减小,当梯度层粉末粒度为13.6μm、梯度层厚度小于20μm时,梯度层厚度对其孔径分布与透气系数影响不大;当梯度层粉末粒度为2.7μm时,梯度层的最佳匹配厚度是50μm。

Centrifugal-deposited method was introduced to prepare graded-porous layer on porous tube. The effect of particle size on the performance of the graded-porous layer was investigated, and the effect of the thickness of graded-porous layer on its pore structure was also studied in this paper. The results show that the permeability and middle flux of graded layer quickly decrease while the particle size under 5 μm, and there is no effect of layer thickness on the pore size distribution and permeability of graded layer when the thickness of graded layer under 20 μm and the particle size is 13.6 μm （Fsss）.