49. Відділ матеріалознавства та інженерії високостійких поверхневих шарів

Постійне посилання на фондhttps://archive.ipms.kyiv.ua/handle/123456789/80

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2014 - 20152

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Ключові словаsearch.filters.applied.operator.equals: search.filters.subject.wear mechanism

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  • Ескіз недоступний
    Документ
    STRUCTURE, PHASE COMPOSITION, AND WEAR MECHANISMS OF PLASMA-SPRAYED NiCrSiB–20 wt.% TiB2 COATING
    (Powder Metallurgy and Metal Ceramics, 2015) A. P. Umanskii; M. S. Storozhenko; I. V. Hussainova; A. E. Terentiev; A. M. Kovalchenko; M. M. Antonov
    The structure, phase composition, and wear mechanisms of plasma-sprayed NKhTB20 coating (NiCrSiB–20 wt.% TiB2) are studied. To produce NKhTB20 composite powder, commercial PR-NKh16SR3 (NiCrSiB) powder was mixed with 20 wt.% TiB2 and the charge was pressed and sintered in vacuum at 1100C for 30 min. During sintering, the components react to form chromium borides. The sinters were ground and classified into the particle size fraction –100+60 nm for plasma spraying. The plasma-sprayed NKhTB20 coating consists of a nickel-based matrix reinforced with titanium diboride and chromium boride grains. The friction and wear behavior of the NKhTB20 coating in dry friction against plasma-sprayed NiCrSiB and NKhTB20 coatings is examined. It is revealed that the NKhTB20/NiCrSiB friction pair has higher wear resistance than NKhTB20/NKhTB20. The contact surfaces of the NKhTB20/NKhTB20 friction pair are damaged under oxidative and abrasive wear mechanisms. Oxidative wear is the dominant mechanism for the NKhTB20/NiCrSiB friction surface. Complex oxide films form on the NKhTB20/NiCrSiB sliding surface and prevent it from damage.
  • Ескіз недоступний
    Документ
    Effect of oxidation on sliding wear behavior of NiCrSiB-TiB2 plasma sprayed coatings
    (Key Engineering Materials, 2014) O. Umanskyi; I. Hussainova; M. Storozhenko; O. Terentyev; M. Antonov
    The main goal of this work is to study dry sliding wear behavior of NiCrSiB-TiB2 plasma sprayed coating against NiCrSiB coating. NiCrSiB-based сomposite powders with 10, 20, 40 wt.% TiB2 particles content were deposited on steel substrates by plasma spraying. The structure of NiCrSiB-TiB2 coatings consists of Ni-based matrix and TiB2 and CrB grains. Among the coatings studied, the NiCrSiB-20wt.%TiB2 shows excellent wear-resistance. The worn surfaces were observed using scanning electron microscopy and Auger electron spectrometry analysis to determine the wear mechanisms.