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Tailoring the Composition and Structure of Nb-, Si-, and B-Doped Mo-Based Composite Materials in the Self-Propagating High-Temperature Synthesis Metallurgy Process

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Abstract—

We have examined for the first time the feasibility of producing cast Nb-, Si-, and B-doped Mo-based composite materials by a spin-casting self-propagating high-temperature synthesis metallurgy method and obtained new results regarding control over their composition and structure. In synthesis, we used combinations of a highly exothermic (MoO3/Nb2O5/Al/Si/B) and a low-exothermic (Mo/Nb/Si/B) composition. We have assessed the effect of the ratio of the ratio of the highly exothermic and low-exothermic compositions (α) and acceleration (a) on the composition and structure of the cast composite materials. The mixtures have been shown to be capable of combustion at up to 80% low-exothermic composition. The combustion products have cast form in the range 0 ≤ α ≤ 65%. At α in the range from 0 to 40% and accelerations from 40g to 400g, the combustion products have the form of a two-layer ingot: the lower layer (Mo–Nb–Si–B) consists of the required product and the upper layer (Al2O3) is a slag product. The optimal parameters for the preparation of cast Mo–Nb–Si–B materials are α = 20–30% and a > 100g.

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Authors and Affiliations

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

    D. E. Andreev, Yu. S. Vdovin, V. I. Yukhvid, N. V. Sachkova, T. I. Ignat’eva & I. D. Kovalev

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  1. D. E. Andreev
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  2. Yu. S. Vdovin
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  3. V. I. Yukhvid
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  4. N. V. Sachkova
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  5. T. I. Ignat’eva
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  6. I. D. Kovalev
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Correspondence to V. I. Yukhvid.

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Translated by O. Tsarev

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Andreev, D.E., Vdovin, Y.S., Yukhvid, V.I. et al. Tailoring the Composition and Structure of Nb-, Si-, and B-Doped Mo-Based Composite Materials in the Self-Propagating High-Temperature Synthesis Metallurgy Process. Inorg Mater 56, 1265–1270 (2020). https://doi.org/10.1134/S002016852012002X

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  • DOI: https://doi.org/10.1134/S002016852012002X

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