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A Study of the Thermal Conductivity, Electrical Resistivity, and Microwave Absorption of Pressureless Sintered AlN–Y2O3–Mo and AlN–Y2O3–TiN Composites

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Abstract

Compositions of AlN–Y2O3–Mo and AlN–Y2O3–TiN composite materials with high thermal conductivity have been selected for bulk absorbers of microwave energy in delay systems. The thermal conductivity, electrical resistivity, and electromagnetic absorption of pressureless sintered AlN-based composites with different volume concentrations of conducting Mo and TiN particles are determined.

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Notes

  1. The composition of PSrMPd 62–27–5B: 67.5–68.5 wt % silver, 4.5–5.5 wt % palladium, and the rest is copper; melting point Tm = 810°C.

  2. Hereafter, the composition of materials is given in vol %.

  3. The absorber ring with an outer diameter of 16 mm, an inner diameter of 6 mm, and a thickness of 2.7 mm is located in the 15th resonator of the DS.

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ACKNOWLEDGMENTS

We express our sincere gratitude to G.S. Oleinik, Dr. Sci. (Phys.–Math.), from the Frantsevich Institute of Problems of Materials Science, National Academy of Sciences of Ukraine, for the help in conducting the X-ray spectral microanalysis and N.V. Sergienko, Research Associate of the Bakul Institute of Superhard Materials, National Academy of Sciences of Ukraine, for the assistance in measuring the electrical conductivity of composites.

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Authors and Affiliations

  1. State Enterprise Research Institute Orion, 03680, Kyiv, Ukraine

    V. I. Chasnyk

  2. Ukrainian Research Institute of Special Equipment and Forensic Science of Security Service of Ukraine, 03113, Kyiv, Ukraine

    D. V. Chasnyk

  3. Bakul Institute of Superhard Materials, National Academy of Sciences of Ukraine, 04074, Kyiv, Ukraine

    I. P. Fesenko & O. M. Kaidash

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  1. V. I. Chasnyk
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  2. D. V. Chasnyk
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  3. I. P. Fesenko
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  4. O. M. Kaidash
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Correspondence to I. P. Fesenko.

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Translated by O. Kadkin

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Chasnyk, V.I., Chasnyk, D.V., Fesenko, I.P. et al. A Study of the Thermal Conductivity, Electrical Resistivity, and Microwave Absorption of Pressureless Sintered AlN–Y2O3–Mo and AlN–Y2O3–TiN Composites. J. Superhard Mater. 42, 165–176 (2020). https://doi.org/10.3103/S1063457620030028

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