โ Scribed by P.R Swann
No coin nor oath required. For personal study only.
Ehrlich and Huddao) have recently shown that the self-diffusivity of W adatoms on a (110) terrace is given by: rt, = 3 X 10M2 exp [-22,00O/RT] cm2/sec. The conditions of this experiment are such that Class l-type (t/~ < 1) diffusion is being observed. These results should be contrasted to the mass transfer determination of O,[= (n,/iV,)D,] of W by Barbour et al@) The temperature dependence in this case, D, = 4 exp [-72,00OfRT] cms/sec, shows a much higher &, and Q, compared to the distinguishable adatom measurements, in agreement with the predictions of equations ( 9), ( 14) and ( 17) of our analysis.
~c~e~zt~~c ~boratory Ford Motor Go.
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## Abstract It is found by the method of transmission electron microscopy that the main elements of dislocation structure of deformed corundum are spatial triple dislocation nodes, recombination zones and dislocation network fragments. The structure of dislocation nodes is analyzed. It is shown tha
through the unsilvered windows in the dewar, and we have apparently avoided difficulties associated with a higher initial filling pressure. I wish to thank D. W. Bloom and A. H. Gavignet for assistance,