Obtainment of fibers and porous materials from TI^sub 2^AlNb-based alloy

A fiber from Ti2AlNb-based alloy was obtained by the pendent drop extraction method (PDME). The fiber's microstructure, phase composition, compactability and sintering were investigated. The PDME method allowed obtaining a continuous rapidly-solidified fiber with microcrystalline structure whic...

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Bibliographic Details
Published in:Materials letters 2017-09, Vol.203, p.85
Main Authors: Senkevich, KS, Umarova, OZ, Serov, MM
Format: Article
Language:English
Subjects:
Aluminides
Beta phase
Continuous fibers
Continuous sintering
Crystal defects
Crystallization
Intermetallic compounds
Low density materials
Materials science
Microstructure
Phase composition
Porosity
Porous materials
Rapid solidification
Sintering
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Summary:A fiber from Ti2AlNb-based alloy was obtained by the pendent drop extraction method (PDME). The fiber's microstructure, phase composition, compactability and sintering were investigated. The PDME method allowed obtaining a continuous rapidly-solidified fiber with microcrystalline structure which consisted of equiaxed grains with the size of less than 20 µm, and its phase composition was represented by a β-phase fixed by a rapid crystallization rate. Fibers possess good compactability at room temperature, which allows to obtain non-sintered fiber materials with a wide porosity range. Sintering at 1100 °C during an hour provides high quality of fibers sintering process without formation of defects and pores in joint area. Fiber porous titanium aluminides based on Ti2AlNb are promising high-temperature low-density materials.
ISSN:0167-577X
1873-4979