精品人妻人人做人人爽夜夜爽,av免费播放网站,久久久久久成人网

文章信息/Info

Author(s):: WANG Qiangbing; TANG Huiping; YANG Baojun; State Key Laboratory of Porous Metal Materials, Northwest Institute for Non-ferrous Metal Research

摘要:: 梯度金屬多孔材料是孔徑或孔隙率沿厚度方向變化的一類金屬多孔材料，也叫非對稱金屬多孔材料或微孔金屬膜，由孔徑較大的支撐體和孔徑較小的精度控制層組成。支撐體主要起骨架增強作用，精度控制層主要攔截顆粒。采用離心沉積的方法，在模具腔內壁形成梯度粉末層坯料，取出坯料進行干燥、燒結后獲得連續梯度金屬多孔材料。過濾試驗表明，在相同精度等級下，該梯度多孔材料的透過性能是常規相同孔徑金屬多孔材料的10倍以上，是突變孔徑梯度金屬多孔材料的3倍以上。羰基鐵高壓分解氣過濾應用表明，連續梯度金屬多孔材料具有精度高、處理量大等特點。與常規金屬多孔材料相比，在羰基鐵高壓分解氣過濾等方面具有明顯優勢，氣固分離精度可達0.35 μm，運行壓差小于20 kPa。

Abstract:: Graded porous metal material is a type of material with the variations of pore size and porosity along its thickness, refered to as asymmetric porous metal material or microporous metal film. The porous material consists of the support layer with large pore size and the precision control layer with small pore size. The support layer is the skeleton and the precision control layer intercepts particles. The centrifugal desoposition was used to form graded powder layer flan in mould inner walls, then the flan was taken out and dried. We obtained the continuously graded porous metal materials by sintering the flan. Filtration test results showed that the permeability of the continuously graded porous metal materials is more than tenfold that of typical porous materials with the same pore size, and more than 3 times than break graded porous metal materials. The high pressure decomposition gas of carbonyl iron was filtred with asprepared materials. The results indicated that the continuously graded porous metal materials have high accuracy, large amount of treatment and so on. While compared with typical porous materials, the continuously graded porous metal materials used in high pressure decomposition gas filtering of carbonyl iron have obvious merit, i.e. the gassolid separation accuracy can reach 0.35 μm, and the pressure is less than 20 kPa.