Studying of Diffusion of the Titan in Corundum Ceramics
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4. Summary
Thus, in the present work results of high-temperature
diffusion Ti from TiB2 in a surface pure corundum ce-
ramics for the first time are shown:
1) depending on a temperature mode it is formed dif-
fusions a layer with various depth (to 500 µm - 3 mm) in
which some zones differ;
2) at transition from a surface deep into the sample,
maintenance Ti in zones decreases with ~0.4 to 0.00% wt.
(It is established with the help visible cathodelumines-
cence);
3) also can be defined and depth of penetration Ti in a
surface of grains of sapphire in the form of ion Ti+3 (it is
maximum to 20 µm, CL);
4) Knoop microhardness after thermodiffusion in-
creases more, than in 1.5 times.
Samples with coverings have shown increase in
strength at a bend on from 11.5% to 45% [4] in compari-
son with initial samples.
In summary it is possible to notice that there are real
prospects of improvement of physicomechanical proper-
ties of a surface of ceramics for the account of ceramic
coverings with the improved properties.
5. Acknowledgements
Authors consider as the pleasant debt to express gratitude
to doctors M. V. Zamoryanskaya, E. V. Ivanova, and V.
M. Krymov for the help in work.
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