[Kovove materialy - Metallic materials]
    Fri - March 29, 2024 - 06:39 No. of hits : 1736624 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 44 (2006), Issue 1

Combustion synthesis of cast intermetallic Ti-Al-Nb alloys in a centrifugal machine
SANIN, V., YUKHVID, V., SYTSCHEV, A., ANDREEV, D.
vol. 44 (2006), no. 1, pp. 49 - 55

Abstract
The effect of green powder composition and centrifugal overload n on combustion temperature, separation of metallic products from ceramic phases, chemical composition and microstructure of intermetallic Ti-Al-Nb alloys prepared by Self-propagating High-temperature Synthesis (SHS) in a centrifugal machine was investigated. It was found that SHS can be performed in a combustion mode by addition of energy-producing CaO2+Al components into the product-forming Ti + Nb + Al or TiO2 + Nb2O5 + Al powder mixtures. The yield of a metallic product increases, porosity decreases and microstructure significantly changes with increasing n. The presence of CaO in combustion products and centrifugal overload facilitates almost complete separation of ceramic phases from the metallic product. The uniform microstructure of metallic products and chemical composition close the targeted Ti-46Al-8Nb (at.%) can be achieved by an appropriate selection of SHS parameters.

Key words
SHS, combustion synthesis, intermetallics, cast titanium aluminides

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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