3072.     SCHENCK, R., AND MEYER, K.  [Carbide Studies in the Methane Synthesis.  IV.  The Chemistry of Double Carbide.]  Ztschr. anorg. Chem., vol. 243, 1940, pp. 259-268; Chem. Abs., vol. 34, 1940, p. 4974.

        From the carbonization isotherms at 800° for 7 mixtures of Fe and W, a space model for the overall isotherms was prepared.  By projection on the base, 6 fields were obtained, having the following compositions:  A, consisting of the double carbide Fe₆W₆C₆ and γ-Fe; B, a-Fe, W, and Fe₆W₆C₆; C, η-W, Fe₆W₆C₆, and FeW₂₃C₇; D, mixed crystals of W (containing C and Fe) and FeW₂₃C₇; E, a-FE (containing W); F, a- and β-Fe (stable).  Fe₆W₆C₆ is considered a compound of Fe₃C and W₂C; it decomposes above 800° into graphite and mixed crystals.  Other carbides are indicated by vapor-pressure measurements on the CH₄ phase.

                    SCHENCK, R., KURZEN, F., AND WESSELKOCK, H.  [Activation of Metals by Foreign Substances.  II.]  See abs. 3067.

        SCHENCK, R., LAYMANN, A., AND JENCKEL, E.  [Equilibrium Investigations in the Reduction, Oxidation, and Carburization Processes of Iron.  XIII.]  See abs. 3062.

        SCHENCK, R., MEYER, K., AND MAYER, K.  [Carbide Studies in the Methane Synthesis.  III.]  See abs. 3071.