Effect of Surface Curvature (4) S.J.T.U. Phase Transformation and Applications Page 19/42 4,-4= The chemical potential of a material with a radius of curvature r is greater than the chemical potential for that same material with an infinite radius of curvature. For a non-spherical,curved surface with principal radii of curvature r and r2,the difference in chemical potential is: SJTU Thermodynamics of Materials Spring2008©X.J.Jin Lecture 20 surfacePhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 20 surface Page 19/42 Effect of Surface Curvature (4) r I V γ μμ 2 ∞ =− The chemical potential of a material with a radius of curvature r is greater than the chemical potential for that same material with an infinite radius of curvature. For a non-spherical, curved surface with principal radii of curvature r1 and r2, the difference in chemical potential is: ) 21( 21 , 21 rr rr ∞ Vγμμ +=−