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Fizika Goreniya i Vzryva, 2008 Volume 44, Issue 5, Pages 106–111 (Mi fgv1435)

This article is cited in 6 papers

Structure formation during gas-detonation spraying of coatings from composite powders TiAl$_3$ and Ni$_3$Al

V. Yu. Filimonova, V. I. Yakovleva, M. A. Korchaginb, M. V. Loginovaa, A. S. Semenchinaa, A. V. Afanas'eva

a Polzunov Altai State Technical University, Barnaul, 656038, Russia
b Institute of Solid State Chemistry and Mechanochemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630128, Russia

Abstract: This paper considers the mechanisms of structure formation during gas detonation spraying of coatings of TiAl$_3$ and Ni$_3$Al intermetallic compounds produced under equilibrium and nonequilibrium synthesis conditions. The coating sprayed from TiAl$_3$ has the same phase composition as the initial powder, regardless of the synthesis conditions. During spraying of Ni$_3$Al, the structure of the coating also does not depend on the synthesis conditions and consists of two phases – Ni$_3$Al and NiAl, with the crystal structure varying along the coating thickness. Comparative impact abrasion tests of the coatings showed advantages of TiAl$_3$ coatings over coatings based on Ni$_3$Al and titanium diboride.

Keywords: detonation spraying, nonequilibrium structure formation, phase transformation, high-temperature synthesis, mechanical activation.

UDC: 621.793.7; 536.46

Received: 03.10.2007


 English version:
Combustion, Explosion and Shock Waves, 2008, 44:5, 591–596

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