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Oxidation resistance of ruthenium and ruthenium phosphide powders in argon and air

  • Theory, Production Technology, and Properties of Powders and Fibers
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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

  1. 1.

    The thermal stability of ruthenium phosphides in air diminishes with increase in their phosphorus content. The initial vigorous oxidation temperature is 600 for ruthenium, 590 for Ru2P, 390 for RuP, and 270°C for RuP2. These temperatures must be regarded as the limits of thermal stability of these substances in air.

  2. 2.

    The oxidation of the phosphorus in the phosphides has a stepwise character. The first to oxidize are phosphorus atoms which can be reached most readily by oxygen. Phosphorus atoms located in the octahedral voids oxidize more slowly, together with ruthenium atoms.

  3. 3.

    Under polythermal oxidation conditions the maximum weight gain temperature for these phosphides falls with increase in their phosphorus content.

  4. 4.

    The end products of the oxidation are P2O5, which sublimates, and RuO2.

  5. 5.

    On heating in argon Ru2P and RuP melt, without decomposing, at 1500 and 1555°C, respectively, while RuP2 decomposes at 950°C.

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Authors and Affiliations

  1. Institute of Materials Science, Academy of Sciences of the Ukrainian SSR, Ukraine

    V. B. Ghernogorenko, A. A. Semenov-Kobzar' & L. Ya. Kulik

Authors
  1. V. B. Ghernogorenko
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  2. A. A. Semenov-Kobzar'
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  3. L. Ya. Kulik
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Translated from Poroshkovaya Metallurgiya, No. 3(159), pp. 16–19, March, 1976.

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Ghernogorenko, V.B., Semenov-Kobzar', A.A. & Kulik, L.Y. Oxidation resistance of ruthenium and ruthenium phosphide powders in argon and air. Powder Metall Met Ceram 15, 178–180 (1976). https://doi.org/10.1007/BF00806520

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  • DOI: https://doi.org/10.1007/BF00806520

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