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Metals 2017, 7(9), 355; doi:10.3390/met7090355

Mechanical Characterization of Composite Coatings Formed by Reactive Detonation Spraying of Titanium

1
College of Physics, Jilin University, Changchun 130022, China
2
Institute of Strength Physics and Materials Science SB RAS, Tomsk 634055, Russia
3
Department of Materials Science in Mechanical Engineering, National Research Tomsk Polytechnic University, Tomsk 634050, Russia
4
Laboratory of Detonation Flows, Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk 630090, Russia
5
Department of Mechanical Engineering and Technologies, Novosibirsk State Technical University, Novosibirsk 630073, Russia
6
Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
*
Author to whom correspondence should be addressed.
Received: 18 August 2017 / Revised: 5 September 2017 / Accepted: 5 September 2017 / Published: 8 September 2017
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Abstract

The structure and mechanical properties of the coatings formed by reactive detonation spraying of titanium in a wide range of spraying conditions were studied. The variable deposition parameters were the nature of the carrier gas, the spraying distance, the O2/C2H2 ratio, and the volume of the explosive mixture. The phase composition of the coatings and the influence of the spraying parameters on the mechanical properties of the coatings were investigated. In addition, nanohardness of the individual phases contained in the coatings was evaluated. It was found that the composition of the strengthening phases in the coatings depends on the O2/C2H2 ratio and the nature of the carrier gas. Detonation spraying conditions ensuring the formation of composite coatings with a set of improved mechanical properties are discussed. The strength of the coatings was determined through the microhardness measurements and local characterization of the phases via nanoindentation. Three-point bending tests were employed in order to evaluate the crack resistance of the coatings. The strengthening mechanisms of the coatings by oxide or carbonitride phases were discussed. View Full-Text
Keywords: detonation spraying; three-point bending; electron microscopy; micromechanics; composites; titanium alloys; powder methods; phase transformation detonation spraying; three-point bending; electron microscopy; micromechanics; composites; titanium alloys; powder methods; phase transformation
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MDPI and ACS Style

Panin, S.; Vlasov, I.; Dudina, D.; Ulianitsky, V.; Stankevich, R.; Batraev, I.; Berto, F. Mechanical Characterization of Composite Coatings Formed by Reactive Detonation Spraying of Titanium. Metals 2017, 7, 355.

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