FeAl金属间化合物多孔材料的制备  

Preparation of porous FeAl material

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：《材料研究学报》2008年第5期485-489,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金20636020;湖南省自然科学基金05JJ30097资助项目~~

摘　　要：以Fe、Al粉末为原料,用反应合成工艺制备FeAl金属间化合物多孔材料,表征了孔结构.结果表明,在FeAl金属间化合物多孔材料的制备过程中烧结坯发生明显的体积膨胀;在1000℃以下,随着烧结温度的升高FeAl烧结坯的孔隙度和最大孔径增大;经1000℃烧结后FeAl多孔材料的孔隙度为35.3%,最大孔径为2.0μm;造孔机理是Kirkendall效应造孔、反应造孔以及粉末颗粒间隙孔的演变.Porous FeAl material has been prepared by reactive synthesis and the pore structure have been characterized. The results show that swelling is the main behavior during reactive synthesisprocess. When the sintering temperature is below 1000℃, the open porosity and maximum pore size of porous FeAl material increase with the increasing of sintering temperature. After sintered at 1000℃, the porous FeAl material has the porosity of 35.3%, maximum pore size of 2.0 μm. The main pore formation mechanisms were the Kirkendall effect, reaction and the evolvement of interparticle pores.

关 键 词：金属材料 FEAL 金属间化合物 多孔材料 Kirkendall效应 

分 类 号：TG146[一般工业技术—材料科学与工程]