2930.     ---------------.  [RUFF, O., AND BORMANN, W.]  [Investigations at Higher Temperatures.  VI.  Nickel and Carbon.]  Ztschr. anorg. Chem., vol. 88, 1914, pp. 386-396; Chem. Abs., vol. 9, 1915, p. 435.

        Addition of C to Ni lowers the melting point to a minimum at 1,311° and 2.20% C; the eutectic line could be followed by 0.3% C.  With increasing temperature the solubility of C in the melt increases first slowly, then rapidly, to a flat maximum at 2,100° and 6.4% C; the melt is the almost pure Ni₃C.  As the temperature is increased, the solubility of C first diminishes sharply then increases slowly to 6.3% C at 2,490°; the latter solution boils at 30 mm., and the vapor in equilibrium contains 0.28% C.  Pure Ni boils at 30 mm. at about 2,400°.