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Effect of the Mechanical Activation Time on the Density of Fine-Grained 90W–7Ni–3Fe Alloy Synthesized by Spark Plasma Sintering

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Abstract

The effect of the high-energy mechanical activation (HMA) time on the microstructure of heavy tungsten 90% W–7% Ni–3% Fe alloy (VNZh-90) and its solid-phase sintering kinetics was studied. Alloy specimens were manufactured by vacuum spark plasma sintering (SPS). It has been shown that the density of alloy VNZh-90 depends on the HMA time nonmonotonically with a minimum. It has been demonstrated that the kinetics of the SPS of mechanically activated nanopowders has a two-stage character; the sintering rate depends on the Coble creep rate and the diffusion rate of W atoms in the crystal lattice of the nickel based γ-phase.

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Funding

This study was supported by the Program “Priority-2030" of the Ministry of Science and Higher Education of Russia (grant no. N-498-99_2021-2023).

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Authors and Affiliations

  1. Lobachevsky State University of Nizhny Novgorod, 603022, Nizhny Novgorod, Russia

    V. N. Chuvil’deev, A. V. Nokhrin, M. S. Boldin, E. A. Lantsev & N. V. Sakharov

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  1. V. N. Chuvil’deev
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  2. A. V. Nokhrin
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  3. M. S. Boldin
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  4. E. A. Lantsev
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  5. N. V. Sakharov
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Correspondence to A. V. Nokhrin.

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Translated by E. Glushachenkova

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Chuvil’deev, V.N., Nokhrin, A.V., Boldin, M.S. et al. Effect of the Mechanical Activation Time on the Density of Fine-Grained 90W–7Ni–3Fe Alloy Synthesized by Spark Plasma Sintering. Phys. Metals Metallogr. 124, 987–994 (2023). https://doi.org/10.1134/S0031918X23601749

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