2017 №04 (04) DOI of Article
2017 №04 (06)

Automatic Welding 2017 #04
Avtomaticheskaya Svarka (Automatic Welding), #4, 2017, pp. 25-31

Detonation coatings of intermetallic powders of Fe–Al system produced using mechanical alloying

Yu.S. Borisov1, A.L. Borisova1, E.A. Astakhov1, T.V. Tsymbalistaya1, A.N. Burlachenko1, M.A. Vasilkovskaya2 and A.I. Kildy1

1E.O. Paton Electric Welding Institute, NASU 11 Kazimir Malevich Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
2I.M. Frantsevich Institute of Problems of Materials Science 3 Krzhyzhanivskogo Str., 03680, Kiev-142, Ukraine. E-mail:deprconf@ipms.kiev.ua
Structure, composition and microhardness of detonation coatings were examined. They were received using Fe2Al, FeAl and Fe2Al5 intermetallic powders, produced by mechanical alloying (MA) method, and mixtures of Fe and Al powders of equivalent compositions. An effect of «oxygen–combustible gas» relationship in the detonation mixture on oxidation process of material being sprayed was determined. The results of determination of phase composition of the coatings, deposited using different powders, show that in case of application of mechanical mixtures a layer mainly consists of the particles of Fe and al initial mixture. A structure of coatings of MA Fe–Al-powders contains mixture of heating and oxidation products of these powders. Microhardness of the coatings varies from 4580 to 5710 MPa depending on composition. 21 Ref., 3 Tables, 8 Figures.
Keywords: detonation spraying, iron aluminides, powders, mechanical alloying, composition of detonation mixture, coatings, phase composition, microhardness
Received:                31.03.17
Published:               17.04.17
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