COMPUTATIONAL-EXPERIMENTAL APPROACH TO PREDICTION 
OF MASS-TRANSFER PROCESSES IN METALLIC COATINGS OF 
GAS-TURBINE BLADES AND THEIR SERVICE LIFE

P. G. Krukovskii,a K. A. Tadlya,b  A. I. Rybnikov,b  
N. V. Mozhaiskaya,b  I. I. Kryukov,b  and V. Kolarikc 

UDC 539.219:620.193.2

A computational-experimental approach to analysis of long-time 
processes of mass transfer of aluminum in metallic MCrAlY coatings 
of gas-turbine blades and to prediction of their service life is proposed. 
The approach is based on the mathematical model describing the oxidation 
and diffusion processes in the coating and in the alloy of a blade, 
the parameters of which are identified by the data of short-time experiments. 
The results of theoretical and experimental determination of the aluminum-
concentration distributions in the coating and in the basic alloy of 
a gas-turbine blade and the results of prediction of the service life 
of the coating are presented. It is shown that this approach allows one 
to perform analysis of long-time processes of mass-transfer in metallic 
coatings of gas-turbine blades and predict their service life with a high 
degree of accuracy.

aInstitute of Applied Thermal Physics, 2a Zhelyabov Str., 
Kiev, 03057, Ukraine; email: kruk@kiev.ua; 
bI. I. Polzunov Central Boiler-Turbine Institute; 
email: rybnikov@online.ru; cFraunhofer Institute 
of Chemical Technologies, Pfinztal, Germany; email: vk@ict.thg.de. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 77, No. 3, pp. 
9-15, May-June, 2004. Original article submitted April 21, 
2003.