PROBLEM ON DIFFUSION OF A PARTIALLY SOLUBLE 
IMPURITY IN A SOLID MATRIX WITH ALLOWANCE FOR 
THE DEPLETION OF THE DIFFUSANT SOURCE WITH TIME

V. P. Gladkov, V. A. Kashcheev,
V. I. Petrov, and I. M. Rumyantsev

UDC 539.219.3

An analytical expression for the concentration profile 
of a diffusing element partially soluble in the material's sample 
has been obtained on condition that the diffusion source is depleted 
with time. Examples of the use of the solution obtained for processing 
of diffusion experiments carried out with a number of impurities in 
beryllium have been considered. The use of the present model shows 
a more accurate agreement of the calculated and experimental concentration 
profiles, which enables one to refine the characteristics of diffusion 
mobility of the impurities in the materials under study.

Moscow Institute of Engineering Physics (State University), 
31 Kashirskoye Shosse, Moscow, 115409, Russia; email: ivanr@sim.ru. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 78, No. 2, pp. 
111-117, March-April, 2005. Original article submitted March 
1, 2004.