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 1973.    KOZHINA, N. K.  [Behavior of Fe₃C in a Stream of CO₂.]  Stal, vol. 1, No. 7/8, 1941, pp. 78-79; Chem. Abs., vol. 38, 1944, p. 3582.

        Interaction between Fe₃C and CO₂ was investigated by X-rays.  There were 2 series of experiments:  In the first powdered pure Fe₃C was heated at various temperatures 200°-800° for 5-60 min. in a stream of pure CO₂; in the 2d the Fe₃C was heated at 400° for 30 min. in a stream of CO₂; then the CO₂ was cut off, and the heating continued to 800°-1,200°.  In the 1^st series, the results were divided into 3 groups:  Samples heated at 200°, 300°, and 400° had a predominance of Fe₃C.  The predominant phase of samples heated at 500° and 570° was hard to determine.  The predominant phase of samples heated at 600°-800° was Fe₃O₄.  Lines of FeO appeared on all röntgenograms.  In the second series the predominant phase was a-Fe.

       KOZLOV, L. I.  See abs. 1589, 1590.

       KRAEBER, L.  See abs. 2151.