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114 ^1168 qtt d uulstrI. E 449 _trEE ?Elol E+g *ol ,_a $tol Elltal uuls4. trfl o-al g olq+ 4Z +e6}q +e+ ?4o14. ol4+ qtg sHgt(surface diffusion), tJ 4lqt(grain boundary diffusion), 4 zl9t(lattice diffusion)ol?+ +=trI. _ Epqtol 7l* nB|=7 Bal$tol r Q+olq 4z}gtol 7l* *vl. olag 7+7+ E qtal i ozy c}s4= 4ol-l 4a 9t4s.z} D+= a"J++ +Col"rl :izlzl 4 trI= 44zl 94. ol ^ldg trH 6-8lr+ (s 6-1) +el Ag4l ++ +c^l= -H _ olE .J + 91r+. 'JHI4oE qtq E4lE a+* "ll= 9sz1 Hl-u4 =g B+l .J ,)+ E dnl-E r'l !-E "JalE +rl= =ld 49 ^Id Eotr+EJ -H-F gr.Ie+ g4l= tr}tr +E6lzl 9*r = B+lol^] +C* alol zr.olJ.9lq. ole+ ?ol ";.Iqt4 gdqtE )ITI H -tr = .zl 9+g =a6}ql^l Etsqt"Jg +E6Iq C4+ q= dzlE El6Iq il4qt (volume diffusion) ol4 +4. -6 2500 2000 1500 12s0 UG .[J .J 4l "J4 -8 tr tz ts tt (a) l8s (b) xl8s ral 6-7 ,JtreJAl +=el qtJgEH 'J 4l+tE -61 ^JHq (phase transformation)*4l Hlzlol E-H EI = glEil ulol q oJ z| rlol g alEg r*ol .5 .6 .7 x 103 lt/" K) ral 6-8 w=el Thol qtl "Jqt+. el= =E a-z€el u| *zltl7la, 44^l qtAl izl 1r Y, -10 N E (-) a-;2 b0 -1.4 -16 .3 .4 1 T