Surface Energy Surface Tension(1) S.J.T.U. Phase Transformation and Applications Page 9/42 Surface tension or surface energy Liquid Isotropic Surface energy does not change as the surface is stretched Solids Function of the crystallographic plane that is expected The nature of a solid surface changes as the material is deformed. SJTU Thermodynamics of Materials Spring 2008 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 9/42 Surface Energy / Surface Tension (1) Surface tension or surface energy Liquid Isotropic Surface energy does not change as the surface is stretched Solids Function of the crystallographic plane that is expected The nature of a solid surface changes as the material is deformed