摘要
以大通量、大孔径的FeAl金属间化合物多孔材料作支撑体,在其上制备1层小孔径的同质FeAl多孔膜,得到均质FeAl金属间化合物多孔膜材料。采用SEM和孔结构测试,研究膜层厚度对FeAl多孔膜材料最终孔结构参数的影响,并对FeAl膜材料的高温抗氧化性能进行研究。结果表明:所制FeAl多孔膜材料表面平整,无裂纹等缺陷;随膜层厚度的增加,FeAl多孔膜材料的最大孔径、透气度均降低,相对于支撑体,膜厚为120μm时的最大孔径从11.7μm减小至9.3μm,透气度减小幅度为45.2%。FeAl多孔膜材料具有优异的高温抗氧化性能,经550℃循环氧化40 h后,膜厚分别为120、180和260μm的试样的质量变化率仅分别为1.87%、1.25%和0.25%。
Homogeneous FeA1 membrane was prepared by fabricating a small pore size FeAl membrane on porous FeAl intermetallics support matrix with large pore size and permeability. Effect of membrane thickness on pore structure parameters and high temperature oxidation behavior of porous FeAl membrane were studied through SEM and pore structure testing. The results show that, homogeneous FeA1 membrane with fiat surface and no crackle is obtained; the maximum pore size and permeability of FeA1 membrane decrease with increasing membrane thickness; compared with porous FeA1 matrix, maximum pore size of FeAl membrane with thickness of 120 μm decreases form 11.7 ktm to 9.3 lam and permeability decreases by 45.2%; FeAlmembrane has excellent high temperature oxidation behavior, after oxidation at 550℃ for 40 h, the mass change ratio of FeAl embrane with membrane thickness of 120,180 and 260μ m are 1.87%, 1.25% and 0.25%, respectively.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2013年第1期144-148,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金资助项目(51071178)
湖南省自然科学基金资助项目(11JJ4036)
中南大学自由探索计划
关键词
FEAL
多孔材料
膜
透气度
FeAl
porous materials
membrane
permeability
