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2017 №09 (04) DOI of Article
10.15407/as2017.09.05 		2017 №09 (06)

Automatic Welding 2017 №09


Avtomaticheskaya Svarka (Automatic Welding), #9, 2017, pp. 33-39
 

Effect of structure on properties of Al2O3 and Al (or Ti) mechanical mixture coatings produced by multichamber detonation spraying method

L.I. Markashova, Yu.N. Tyurin, O.V. Kolisnichenko, E.N. Berdnikova, O.S. Kushnareva, E.V. Polovetsky and E.P. Titkov


E.O. Paton Electric Welding Institute, NASU 11 Kazimir Malevich Str., 03150, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
Abstract
Effect of structure and phase composition of cermet coatings of Al2O3–Ti (Al) system produced using a unit for multichamber detonation spraying was investigated. Analysis of structure peculiarities of investigated coatings was performed applying optical metallography, analytical scanning as well as transmission microdiffraction electron microscopy. It is shown that dispersion of grain and subgrain structures as well as distribution of forming hardening phases of dispersion size make the most significant contribution in the indices of strength, ductility and crack resistance of the investigated coatings. 21 Ref., 2 Tables, 7 Figures.
Keywords: cermet coatings, multichamber detonation spraying, aluminum oxide, structure, phase composition, dislocation density, hardening, fracture toughness, local internal stresses, crack resistance
 
Received:                06.04.17
Published:               10.10.17
 
 
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