Conclusions
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1.
The mechanism of saturation from a fluidized bed is characterized by the source of carbon in the diffusion layer \3- from both solid and gaseous phases.
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2.
The interaction of the gaseous phase with the surface of the metal depends on the sign of polarization. With negative polarization the metal is carburized, and with positive polarization it is oxidized.
The mechanism proposed can be assumed to operate also in the process of carburizing steels in a fluidized bed.
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3.
The phase composition and properties of the diffusion coating on titanium can be varied within wide limits by changing the electrical parameters of saturation (polarization).
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Literature cited
F. V. Dolmanov, É. B. Tazikov, and G. A. Zelenina, "Apparatus for investigating chemicothermal treatment processes in fluidized bed", in: Chemicothermal Treatment of Metals and Alloys [in Russian], Minsk (1974), p. 68.
V. I. Murav'ev and V. P. Kurbatov, "Carburizing in an electrically conducting fluidized bed", Metal. i Term. Obrabotka Metal., No. 9, 61 (1971).
Kh. D. Gol'dshmidt, Interstitial Alloys [in Russian], Mir, Moscow (1971).
A. N. Minkevich, Chemicothermal Treatment of Metals and Alloys [in Russian], Mashinostroenie, Moscow (1965).
Additional information
Khabarovsk Polytechnical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 63–64, March, 1976.
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Dolmanov, F.V., Zelenina, G.A. & Tazikov, É.B. Carburizing of titanium in a vibrofluidized bed. Met Sci Heat Treat 18, 260–261 (1976). https://doi.org/10.1007/BF00663494
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DOI: https://doi.org/10.1007/BF00663494