Editions specialesSrpska kraljevska akademija, 1978 |
Из књиге
Резултати 1-3 од 7
Страница 6
... temperatures ( low D / D or Do / D ) and relatively large particle radii and large x / a , is the volume diffusion predominant [ 1 ] . For small particles at low temperatures neck growth is controlled by surface diffusion [ 1,9 ] ...
... temperatures ( low D / D or Do / D ) and relatively large particle radii and large x / a , is the volume diffusion predominant [ 1 ] . For small particles at low temperatures neck growth is controlled by surface diffusion [ 1,9 ] ...
Страница 7
... temperatures close to melting point . At lower temperatures the grain boundary diffusion coefficients exhibit relatively large activation enthalpies indicating the vacancy mechanism of diffusion process . The ana- logy between under ...
... temperatures close to melting point . At lower temperatures the grain boundary diffusion coefficients exhibit relatively large activation enthalpies indicating the vacancy mechanism of diffusion process . The ana- logy between under ...
Страница 8
... temperatures of sintering . It is interesting to note that the expressions for the neck extension in time with and without the grain boundary in the neck , differ only by numerical values [ 21 ] x5 KiYND a2 kT t i / 1 , 2 ( 9 ) where K1 ...
... temperatures of sintering . It is interesting to note that the expressions for the neck extension in time with and without the grain boundary in the neck , differ only by numerical values [ 21 ] x5 KiYND a2 kT t i / 1 , 2 ( 9 ) where K1 ...