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Information × Registration Number 0223U002286, 0119U100661 , R & D reports Title The technological principles of new composites based on NiAl (Ti) intermetallics development for protection of the hydro-energetic equipment from aggressive water solution action, corrosive and hydro-abrasive wear popup.stage_title Head Umanskyi Oleksandr P., Доктор технічних наук Registration Date 14-02-2023 Organization Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine popup.description2 Based on the data on the study of wetting kinetics and contact interaction in NiAl (NiTi) -Ti(Cr, Zr)B2 systems, new composite materials (compact form and conglomerated powders) have been developed. These materials have a heterophase microstructure with a uniform high-melting compounds` particle distribution in the intermetallic matrix. The coatings were sprayed by plasma and detonation methods on steel samples. They have a thickness of 0.3-1 mm, a density of 95-99%, and bond strength of 35-110 MPa. The regularities of phase and structure formation of composite materials and coatings on the base of intermetallics NiAl and NiTi with the addition of high-melting compounds have been studied, the optimal composition and ratio of structural components for different operating conditions have been determined. Corrosion and hydroabrasive resistance tests of the developed materials and coatings were carried out. In conditions of hydroabrasive wear, detonation coatings NiTi-30 wt.% CrB2 have the lowest values of wear intensity, and the structure of such coatings is characterized by the absence of worked-out areas and damages. In conditions of electrochemical corrosion in 3% aqueous NaCl solution simulating seawater with an increase in the content of high-melting compounds to 30-45 wt. % the nature of the corrosion behavior of composites is similar to the process of anodic dissolution of pure intermetallic. In this case, active dissolution of the intermetallic matrix occurs and the entire surface of the composite is covered with a polyoxide film of NiO+Al2O3, shielding the high-melting inclusions. The best factors of corrosion resistance are shown by the material NiTi-30 wt. % CrB2, that practically doesn`t corrode, which may be due to the formation of a more corrosion-resistant (compared to NiTi) new phase of Ni3Ti. The conducted researches and the obtained results allow recommending the material for its further application as protective corrosion-resistant coating. Product Description popup.authors Bondarenko Oleksii A. Halʹtsov Konstantyn M. Karpenko Sergii V. Konoval Volodymyr P. Leont`iev Dmytro K. Martsenyuk Iryna S. Poliarus Olenа M. Syrovatka Vyacheslav L. Storozhenko Maryna S. Terentiev Oleksandr Ye. Umanskyi Oleksandr P. Chernatsʹka Viktoriya Yu. popup.nrat_date 2023-02-14 Close