3054. SCHENCK, R. [Equilibrium in the Reduction, Oxidation, and Carburization of Iron. V.] Ztschr. anorg. Chem., vol. 167, 1927, pp. 315-328; Chem. Abs., vol. 22, 1928, p. 2132.
Summary of the previous papers in this series. The 3-dimensional equilibrium model of the system Fe-C-O2 is discussed, the system being under an atmosphere of CO and CO2 and at various temperatures 500°-1,000°. An isobar at 1 atm. shows the concentrations of CO and CO2 and the temperatures at which the following will be stable: Fe3C, Fe3O4, wüstite, oxoferrite, and oxoaustenite. Isotherms at 50° intervals 542°-1,000° show the range of stability of the above-mentioned substances when under pressures ranging from 0-1,200 mm. The remarkable influence that impurities have upon the equilibrium is stressed again. The effect of MgO is given in detail. Problems for future solutions are: (1) The systematic investigations of the influences of impurities; and (2) the determination of the composition of the solid solutions oxoferrite and oxoaustenite as they exist under various gas pressures and compositions.