Conclusions
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1.
It has been established, using the solid electrolytes method, that the oxygen partial pressures inside a vacuum furnace with a molybdenum heating element and in a closed volume over a carbon surface at 500–1500°C are determined by the equilibria of the reactions Mo+O2 ⇌ MoO2 and C + CO2 ⇌ 2CO, respectively. In this temperature range the value of\(P_{O_2 } \) varies from 10−28 to 10−7 atm in the former case and from 10−18 to 10−10 atm in the latter.
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2.
It is shown, on the basis of an investigation into the sintering of a nonstoichiometric oxide Cr2O3, that the vacuum and carbon-containing environments under consideration are suitable for the heat treatment of materials at low oxygen pressures.
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Translated from Porosbkovaya Metallurgiya, No. 8(188), pp. 77–80, August, 1978.
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Krivoruchko, P.P., Alapin, B.G. & Degtyareva, É.V. Oxygen partial pressure in the atmosphere of sintering furnaces. Powder Metall Met Ceram 17, 631–634 (1978). https://doi.org/10.1007/BF00797341
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DOI: https://doi.org/10.1007/BF00797341