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Structure and Phase Formation of a Ti–Al–Si Based Alloy Prepared by Self-Propagating High-Temperature Synthesis Compaction

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Abstract—

A lightweight Ti20Al3Si9-based intermetallic alloy with porosity under 3% has been prepared for the first time by compaction in the self-propagating high-temperature synthesis (SHS) regime. The microstructure of the synthesis product has been studied by scanning electron microscopy and time-of-flight mass spectrometry. The content of the major phase, Ti20Al3Si9, in the alloy is 87 wt %, and that of the Ti3Al phase is 13 wt %. A mechanism has been proposed for phase formation in the ternary intermetallic system Ti–Al–Si during the SHS process. The increased microhardness of the alloy (9905 ± 450 MPa) is due to the formation of the Ti20Al3Si9 phase, rich in Si (about 28.13 at %).

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ACKNOWLEDGMENTS

We are grateful to I.D. Kovalev for performing the X-ray diffraction analysis and O.V. Belousova for measuring the porosity and density of the materials.

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Authors and Affiliations

  1. Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    P. A. Lazarev, M. L. Busurina, A. N. Gryadunov, A. E. Sytschev, O. D. Boyarchenko & A. V. Karpov

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  1. P. A. Lazarev
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  2. M. L. Busurina
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  3. A. N. Gryadunov
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  4. A. E. Sytschev
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  5. O. D. Boyarchenko
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  6. A. V. Karpov
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Correspondence to P. A. Lazarev.

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Translated by O. Tsarev

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Lazarev, P.A., Busurina, M.L., Gryadunov, A.N. et al. Structure and Phase Formation of a Ti–Al–Si Based Alloy Prepared by Self-Propagating High-Temperature Synthesis Compaction. Inorg Mater 58, 1005–1010 (2022). https://doi.org/10.1134/S0020168522090096

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  • DOI: https://doi.org/10.1134/S0020168522090096

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