Dissolution of carbon in Ni-1at.% Fe upon strong cold deformation

Smelted Ni-C alloys (containing the Fe-57 isotope for Mossbauer studies) an d powder mixtures of Ni + C (thermal black), Ni + Fe3C and Ni + VC were col d-deformed by compression and shear in Bridgman anvils to produce interstit ial solid solutions of carbon in nickel. Mossbauer spectroscopic and X-ray structure analyses showed that the carbon concentration of the Ni-C solid s olution was 1.5-2 at.%, which was several times smaller than the carbon con centration of Fe-Ni-C alloys produced under similar conditions. The type of carbon-containing particles determined the kinetics but had little effect on the limiting concentration of the synthesized Ni-C solid solutions. Ni-C was formed at a higher degree of deformation than Fe-C. (C) 2001 Elsevier Science B.V. All rights reserved.