Pore structure and gas permeability of high Nb-containing TiAl porous alloys by elemental powder metallurgy for microfiltration application
作者： Fan Yang , Laiqi Zhang , Junpin Lin , Yongfeng Liang , Yuehui He
DOI: 10.1016/J.INTERMET.2012.07.022
关键词:
摘要: Abstract High Nb-containing TiAl porous and gradient alloys were synthesized by elemental powder metallurgy (EPM). The effects of size on pore structure gas permeability investigated. It is found that pores are interconnected skeletons consist typical γ-TiAl/α 2 -Ti 3 Al fully lamellar microstructure for Ti–48Al–6Nb alloys. With the fining particle Ti, Nb powders, porosity decrease. Otherwise, increases almost linearly when from 17% to 52% 3.18 μm 26.69 μm. A good agreement shown between simulations capillary model results actual permeability. In addition, fabricated using different sizes constrained sintering process, a prediction relationship coating thickness was discussed. Results this study indicate potential applications in microfiltration development tailoring coating.
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