Features of sintering compositions based on titanium with refractory compounds

DOI: 10.62564/M4-KP1249

Viktor Solntsev, Gennadii Bagliuk, Tetiana Solntseva, Kostiantyn Petrash, Alevtina Mamonova, Galina Molchanovska

Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine


Titanium-based powder alloys are of particular interest for aerospace engineering due to their high specific strength, corrosion resistance and other properties. To increase wear resistance, it is usually necessary to introduce solid phases and compounds that ensure heterogenization of the structure and, accordingly, localize the development of plastic deformation. The materials that most effectively resist wear are those that form dissipative structures during sintering [1-3]. They arise in complex physicochemical systems due to the competition of chemical reactions that are observed during interaction with refractory compounds with the participation of unstable chalcogenides, which are sources of excitation of autowave processes. Being constantly excitable systems in which continuous transfer is observed due to self-organization processes, it should be expected that activation of sintering will be observed in such compositions. Molybdenum diselenide and disulfide were introduced into titanium compositions with compounds of various natures. Thus, when sintering in systems with titanium carbide, titanium boride and titanium nitride, the introduction of diselenide and molybdenum disulfide leads to significant compaction. When they are introduced into compositions with covalent compounds (B4C, BN, SiC, Si3N4), activation of titanium-based compositions is observed both in certain concentration regions of covalent compounds and chalcogenides. Threshold concentrations are observed at which shrinkage gives way to growth. This is due to the activation of the process of interaction of the covalent compound with titanium. In this case, corresponding titanium compounds are formed with elements that form one or another covalent compound, for example borides, nitrides, carbides, and auto-dispersion of the material structure occurs.

Keywords
titanium, wear resistance, refractory compound

Acknowledgments
Not provided

References
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