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Heat treatment of highly dispersed electrolytic iron and Fe-Co alloy powders with a composite coating

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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

A necessary condition for improving the magnetic properties of powers is improvement of the metal phase structure, elimination of nonmagnetic impurities, and destruction of a chemisorbed coating. Annealing in hydrogen at 633–653 K makes it possible to retain the main geometric size of particles within the limits 0.8–1.0 Μm, to reduce dendrites and to increase the coercive force by a factor of 1.5–2 and the residual specific magnetization of iron and Fe-Co alloy powders up to 95 and 105 A·m2/kg, respectively.

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Literature cited

  1. V. V. Nepomnyashchii, L. N. Tul'chinskii, E. P. Zhelibo, and L. B. Strashinskaya, “Reducing anneal for highly dispersed electrolytic iron powders with an organic coating for particles,” Poroshk. Metall., No. 7, 1–7(19820).

  2. E. P. Zhelibo, “Corrosion of highly dispersed electrolytic iron powders,” Poroshk. Metall., No. 6, 4–9 (1982).

    Google Scholar 

  3. E. P. Zhelibo, T. M. Shvets, T. I. Amelichkina, and V. V. Nepomnyashchii, Inventor's Cert. 956627 USSR, “Method for preparing highly dispersed magnetic powders,” Otkrytiya. Izobret., No. 33, 259 (1982).

    Google Scholar 

  4. I. N. Frantsevich, L. N. Tul'chinskii, T. M. Shvets, and V. V. Nepomnyashchii, “Preparation of constant magnets made of highly dispersed iron and iron-cobalt alloy powders with an organic coating and studies of their properties,” in: Materials of the Internat. Conf. on Powder Metallurgy, Dresden (1977).

  5. V. V. Nepomnyashchii, “Development of magnetically hard materials based on highly dispersed electrolytic powders,” Author's Abstr. Diss. Cand. Tech. Sci., Kiev (1986).

  6. K. K. Ilyunin (ed.), Handbook for Electrical Measuring Instruments, 2nd. edn. [in Russian], Energiya, Leningrad (1977).

    Google Scholar 

  7. L. I. Mirkin (ed.), X-Ray Structural Analysis. Preparation and Measurement of X-Ray Pictures (Handbook)[in Russian], Nauka, Moscow (1976).

    Google Scholar 

  8. é. M. Natanson and é. R. Ul'berg, Colloidal Metals and Metals Polymers [in Russian], Naukova Dumka, Kiev (1971).

    Google Scholar 

  9. A. N. Pilyankevich, Practice of Electron Microscopy (preparation methods) [in Russian], Mashgiz, Moscow-Kiev (1961).

    Google Scholar 

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Authors and Affiliations

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

    V. V. Nepomnyashchii

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  1. V. V. Nepomnyashchii
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Translated from Poroshkovaya Metallurgiya, No. 4(340), pp. 74–78, April, 1991.

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Nepomnyashchii, V.V. Heat treatment of highly dispersed electrolytic iron and Fe-Co alloy powders with a composite coating. Powder Metall Met Ceram 30, 326–329 (1991). https://doi.org/10.1007/BF00795967

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  • DOI: https://doi.org/10.1007/BF00795967

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