| XIE Wei,GAO Hai-yan,FENG Lu-li,GAN Qing-zhan,HE Yue-hui.Preparation of FeAl/FeAlSi Asymmetric Membrane Materials and Bonding Properties between Membrane and Support[J],49(8):210-216 |
| Preparation of FeAl/FeAlSi Asymmetric Membrane Materials and Bonding Properties between Membrane and Support |
| Received:November 07, 2019 Revised:August 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.08.024 |
| KeyWord:FeAl FeAlSi asymmetric membrane materials pore structure bonding strength |
| Author | Institution |
| XIE Wei |
State Key Laboratory of Powder Metallurgy, Central South University, Changsha , China |
| GAO Hai-yan |
State Key Laboratory of Powder Metallurgy, Central South University, Changsha , China |
| FENG Lu-li |
State Key Laboratory of Powder Metallurgy, Central South University, Changsha , China |
| GAN Qing-zhan |
State Key Laboratory of Powder Metallurgy, Central South University, Changsha , China |
| HE Yue-hui |
State Key Laboratory of Powder Metallurgy, Central South University, Changsha , China |
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| Abstract: |
| The work aims to prepare the FeAl/FeAlSi asymmetric membrane materials for high temperature corrosion and to study the bonding properties between the membrane and the support. The FeAlSi porous material with large pore size and high porosity prepared by powder reaction synthesis method was used as the support, and the FeAl coating on the support with small pore size prepared by impregnation method was adopted as the membrane layer to prepare the FeAl/FeAlSi asymmetric membrane material through sintering. The pore structure properties and membrane-support bonding properties of FeAl/FeAlSi asymmetric membrane materials were studied. The phase composition and micro-morphology of porous membrane materials were studied by XRD and SEM; the pore structure parameters of support and membrane were measured by pore structure tester and mercury intrusion method; and the membrane-support bonding property of FeAl/FeAlSi asymmetric membrane materials was studied by tensile test and back-blowing test. The surface of FeAl/FeAlSi asymmetric membrane was uniform and complete, and the metallurgical bonding between the membrane and support was good. The porosity and average pore size of the support were 43.0% and 22.7 μm respectively and the porosity and average pore size of the membrane were 36.5% and 7.5 μm respectively. When the membrane thickness increased, the permeability decreased linearly, and the maximum pore size did not change much in a certain range of membrane thickness. When the membrane thickness was in the range of 150~300 μm, the maximum pore size was 7.8 μm. The bonding strength of membrane-support was more than 5.5 MPa. The pore structure property of FeAl/FeAlSi asymmetric membrane material prepared by impregnation method was excellent, and the bonding properties between the membrane and support can meet the requirements of industrial application. |
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