A-do(2rsin O)rd8=27(1-cose) rsin 0) F(rcos 0)=m( 2-3cos0+(cos0)3 形核前的界面能为:ocA1 「形核后的界面能为:sA2+A1 故:△Gs=(o1sA2+0scA1)-01cA1 =2TT2OLS(1-coS0)+Tr20(OSC-oLc) 把1c=0scos+o代入上式,得: △Gs=πr2os(2-3os+(cos) ΔG为形核的界面能变化值;形核前的界面能为:σLCA1 形核后的界面能为:σLSA2+σSCA1 故:ΔGS=(σLSA2+σSCA1)-σLCA1 =2πr2σLS(1-cosθ)+πr2θ(σSC-σLC) 把σLC=σLScosθ+σsc代入上式,得: ΔGS=πr2σLS(2-3cosθ+(cosθ)3 ) ΔGS为形核的界面能变化值; ( sin ) ( cos ) ( ) (2 sin ) 2 (1 cos ) 3 3 2 3cos (cos ) 0 2 2 0 2 3 − + = = = = − V r d r r A r rd r