Fe-Al系金属间化合物多孔材料的制备及孔结构表征  

Fabrication and pore structure characteristics of porous Fe-Al intermetallics

作　　者：高海燕[1] 贺跃辉[1] 沈培智[1] 江垚[1] 黄伯云[1] 徐南平[2] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]南京工业大学膜科学技术研究所,南京210009

出　　处：《粉末冶金材料科学与工程》2009年第4期275-280,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金重点项目(20636020);国家杰出青年科学基金资助项目(50825102);国家自然科学基金创新团队项目(50721003)

摘　　要：以Fe、Al元素粉末为原料,采用分段无压反应合成工艺制备Fe-Al系金属间化合物多孔材料,并对其孔结构进行表征。通过改变Fe、Al元素的配比,研究Al含量对Fe-Al金属间化合物多孔材料透气度和最大孔径以及孔隙度的影响。结果表明,Al含量对Fe-Al金属间化合物多孔材料孔隙度的影响显著。在Al含量(质量分数)20%～45%的范围内,Fe-Al金属间化合物多孔材料的孔隙度与Al含量之间遵循严格的直线增加规律;Al含量对Fe-Al金属间化合物多孔材料最大孔径和透气度的影响与对孔隙度的影响相似。本实验条件下Fe-Al系金属间化合物多孔材料中透气度(K),开孔隙度(θ)和最大孔径(dm)之间的定量关系式为:K=0.2538d2mθ。Porous FeAI intermetallics has been prepared through step pressureless reactive synthesis using Fe, Alpowder as raw materials and the pore structure of porous FeAl has been characterized. The effect of AI content on the permeability, maximum pore size and porosity of porous FeAl intermetallics has also been studied through change the proportion of Fe and Al elemental powder. The results show that the Al content is one of the main factors for the porosity, and strictly linear increment rule between the porosity and Al content is confirmed in Fe-Al intermetallics with the Al content ranging from 20%-45% （mass fraction）. The effect of Al content on permeability and maximum pore size is similar as that on porosity. The permeability（K）, the open porosity（θ） and maximum aperture（dm） have the relationship of K=0.2538d^2mθ.

关 键 词：FE-AL 金属间化合物 多孔材料 孔结构 

分 类 号：TG146[一般工业技术—材料科学与工程]