Pore structure and gas permeability of high Nb-containing TiAl porous alloys by elemental powder metallurgy for microfiltration application

被引：45
作者：
Yang, Fan [1 ]
Zhang, Laiqi [1 ]
Lin, Junpin [1 ]
Liang, Yongfeng [1 ]
He, Yuehui [2 ]
Shang, Shunli [3 ]
Liu, Zi-Kui [3 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
来源：
INTERMETALLICS | 2013年 / 33卷
基金：
美国国家科学基金会; 北京市自然科学基金;
关键词：
Intermetallics; Titanium aluminides; Coatings; Powder metallurgy; AL ALLOYS; INFILTRATION; FABRICATION; COMPOSITES; CERAMICS; ALUMINUM; POROSITY;
D O I：
10.1016/j.intermet.2012.07.022
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
High Nb-containing TiAl porous and gradient porous alloys were synthesized by elemental powder metallurgy (EPM). The effects of powder size on pore structure and gas permeability were investigated. It is found that pores are interconnected and skeletons consist of typical gamma-TiAl/alpha(2)-Ti3Al fully lamellar microstructure for Ti-48Al-6Nb porous alloys. With the fining of particle size of Ti, Al and Nb powders, the pore size and porosity of Ti-48Al-6Nb porous alloys decrease. Otherwise, the gas permeability increases almost linearly when the porosity increases from 17% to 52% and the pore size increases from 3.18 mu m to 26.69 mu m. A good agreement is shown between the simulations by capillary permeability model and the results of the actual gas permeability. In addition, gradient porous alloys were fabricated using different powder sizes by constrained sintering process, and a prediction of the relationship between permeability and coating thickness was discussed. Results from this study indicate the potential applications in microfiltration development by tailoring porosity of the coating. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：2 / 7
页数：6
相关论文
共 25 条
[1]   Colloidal and bacterial fouling during constant flux microfiltration: Comparison of classical blocking laws with a unified model combining pore blocking and EPS secretion [J].
Chellam, Shankararaman ;
Cogan, N. G. .
JOURNAL OF MEMBRANE SCIENCE, 2011, 382 (1-2) :148-157
[2]   Deformation mechanism at large strains in a high-Nb-containing TiAL at room temperature [J].
Chen, GL ;
Zhang, LC .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 329 :163-170
[3]   Functionally graded metal/ceramic composites by tape casting, lamination and infiltration [J].
Corbin, SF ;
Zhao-Jie, X ;
Henein, H ;
Apte, PS .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 262 (1-2) :192-203
[4]  
Dullien FAL, 1991, POROUS MEDIA FLUID T, P260
[5]   Self-propagating high-temperature synthesis of nanostructured titanium aluminide alloys with varying porosity [J].
Farley, Cory ;
Turnbull, Travis ;
Pantoya, Michelle L. ;
Hunt, Emily M. .
ACTA MATERIALIA, 2011, 59 (06) :2447-2454
[6]  
Glass SJ, 1999, J AM CERAM SOC, V82, P2745
[7]   Compressive deformation behavior of porous γ-TiAl with directional pores [J].
Ide, T. ;
Tane, M. ;
Nakajima, H. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 508 (1-2) :220-225
[8]   Gas permeability and mechanical properties of porous alumina ceramics with unidirectionally aligned pores [J].
Isobe, Toshihiro ;
Kameshima, Yoshikazu ;
Nakajima, Akira ;
Okada, Kiyoshi ;
Hotta, Yuji .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (01) :53-59
[9]   Effects of the Al content on pore structures of porous Ti-Al alloys [J].
Jiang, Y. ;
He, Y. H. ;
Xu, N. P. ;
Zou, J. ;
Huang, B. Y. ;
Liu, C. T. .
INTERMETALLICS, 2008, 16 (02) :327-332
[10]   Synthesis of silver/polymer colloidal composites from surface-functional porous polymer microspheres [J].
Kim, JW ;
Lee, JE ;
Kim, SJ ;
Lee, JS ;
Ryu, JH ;
Kim, J ;
Han, SH ;
Chang, IS ;
Suh, KD .
POLYMER, 2004, 45 (14) :4741-4747
123