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

Metals

卷:7

Sergey Panin¹  Roman Stankevich²  Filippo Berto³  Ilya Vlasov⁴  Dina Dudina⁵  Vladimir Ulianitsky⁵  Igor Batraev⁵ 

[1] College of Physics, Jilin University, Changchun 130022, China;

[2] Department of Materials Science in Mechanical Engineering, National Research Tomsk Polytechnic University, Tomsk 634050, Russia;

[3] Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway;

[4] Institute of Strength Physics and Materials Science SB RAS, Tomsk 634055, Russia;

[5] Laboratory of Detonation Flows, Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk 630090, Russia;

关键词: detonation spraying;    three-point bending;    electron microscopy;    micromechanics;    composites;    titanium alloys;    powder methods;    phase transformation;   

DOI  :  10.3390/met7090355

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown