ZrCsurface segregation froma dilute (ZrC)1-x(NbC)x solid solutions

Author(s): S.V.Rempel*, A.I.Gusev

The spontaneous surface segregation of ZrC grains from dilute solid solutions (ZrC)1-x(NbC)x with (1-x)0.02 is revealed for the first time. It is shown that the ZrC precipitation is associated with the decomposition of the homogeneous carbide solid solutions (ZrC)1-x(NbC)x. The experimental and theoretical estimates obtained for the segregation energy of ZrC are equal to -50 and -31kJ/mol-1, respectively.

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