Editions specialesSrpska kraljevska akademija, 1978 |
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Резултати 1-3 од 12
Страница 6
exercised , because surface diffusion which takes place along with volume diffusion , always contributes to the increase of the neck . This contribution becomes negligible when Ds D2 & ( C ) 2 < 1 2 a Da ( 7 ) where D , and D are ...
exercised , because surface diffusion which takes place along with volume diffusion , always contributes to the increase of the neck . This contribution becomes negligible when Ds D2 & ( C ) 2 < 1 2 a Da ( 7 ) where D , and D are ...
Страница 7
... diffusion and diffusion through the volume with internal atom sources or what is equivalent , internal vacancy sinks . Herring was first to recognize this in his well known paper on diffusional creep [ 17 ] . He also suggested that only ...
... diffusion and diffusion through the volume with internal atom sources or what is equivalent , internal vacancy sinks . Herring was first to recognize this in his well known paper on diffusional creep [ 17 ] . He also suggested that only ...
Страница 21
... diffusion , k the Boltzmann's constant , and T absolute temperature . The constants C are C1 = 3 for tubular pore [ 26 ] and C2 = 6 for a spherical one [ 52 ] . If the predominant mechanism of pore shrinkage is grain boundary diffusion ...
... diffusion , k the Boltzmann's constant , and T absolute temperature . The constants C are C1 = 3 for tubular pore [ 26 ] and C2 = 6 for a spherical one [ 52 ] . If the predominant mechanism of pore shrinkage is grain boundary diffusion ...