Matches in SemOpenAlex for { <https://semopenalex.org/work/W2779610796> ?p ?o ?g. }
Showing items 1 to 50 of
50
with 100 items per page.
- W2779610796 endingPage "39" @default.
- W2779610796 startingPage "31" @default.
- W2779610796 abstract "Niobium-based composites doped with functional and alloying additives (Si, Hf, Ti, Al, etc.) have prospects for industrial applications such as aircraft engine building. Previously the authors demonstrated that such composites can be synthesized in autowave mode (combustion mode) using highly exothermic Nb2O5 mixtures with Al, Si, Hf and Ti. It was shown that hafnium actively participates in Nb2O5 reduction, and this makes it difficult to introduce it into the composite. This paper focuses on the possibility to synthesize Nb composites doped with a high amount of Hf using centrifugal SHS metallurgy. Experiments on a centrifugal unit under 40 g force demonstrated that reactive Hf replaced by its less reactive compounds Hf–Al or Hf–Ti–Si–Al in Nb2O5/Al mixtures enabled combustion in a steady frontal mode rather than in an explosive one. With the increasing size of Hf–Al granules (from 0–40 to 160–300 μm), the Hf content of resultant composites was found to grow from 1,3 to 3,8 wt.%. In case of Hf–Ti–Si–Al granules 1–3 mm in size introduced to the charge, the Hf content of synthesized composites based on niobium silicides attained a value of up to 8,1 wt.%. Electron microscopy and X-ray diffraction analysis were used to determine the integral composition and distribution of basic and doping elements in the structural components of synthesized composites as well as their phase composition. Composites with a maximum content of Hf (8,1 wt.%) contain three structural constituents: (1) a metal Nb–Si–Ti matrix; (2) intergrain boundaries containing Nb, Ti, and Al; and (3) hafnia-based inclusions. The XRD pattern showed the presence of three phases in the composite: Nb and Nb5Si3 solid solutions as well as minor amounts of Nb3Si." @default.
- W2779610796 created "2018-01-05" @default.
- W2779610796 creator A5012377843 @default.
- W2779610796 creator A5020431607 @default.
- W2779610796 creator A5034731059 @default.
- W2779610796 creator A5064779584 @default.
- W2779610796 date "2017-01-01" @default.
- W2779610796 modified "2023-10-05" @default.
- W2779610796 title "SHS metallurgy of Nb–Si composites" @default.
- W2779610796 doi "https://doi.org/10.17073/0021-3438-2017-6-31-39" @default.
- W2779610796 hasPublicationYear "2017" @default.
- W2779610796 type Work @default.
- W2779610796 sameAs 2779610796 @default.
- W2779610796 citedByCount "0" @default.
- W2779610796 crossrefType "journal-article" @default.
- W2779610796 hasAuthorship W2779610796A5012377843 @default.
- W2779610796 hasAuthorship W2779610796A5020431607 @default.
- W2779610796 hasAuthorship W2779610796A5034731059 @default.
- W2779610796 hasAuthorship W2779610796A5064779584 @default.
- W2779610796 hasBestOaLocation W27796107961 @default.
- W2779610796 hasConcept C159985019 @default.
- W2779610796 hasConcept C191897082 @default.
- W2779610796 hasConcept C192562407 @default.
- W2779610796 hasConcept C7794659 @default.
- W2779610796 hasConcept C87976508 @default.
- W2779610796 hasConceptScore W2779610796C159985019 @default.
- W2779610796 hasConceptScore W2779610796C191897082 @default.
- W2779610796 hasConceptScore W2779610796C192562407 @default.
- W2779610796 hasConceptScore W2779610796C7794659 @default.
- W2779610796 hasConceptScore W2779610796C87976508 @default.
- W2779610796 hasIssue "6" @default.
- W2779610796 hasLocation W27796107961 @default.
- W2779610796 hasOpenAccess W2779610796 @default.
- W2779610796 hasPrimaryLocation W27796107961 @default.
- W2779610796 hasRelatedWork W2008674019 @default.
- W2779610796 hasRelatedWork W2026511702 @default.
- W2779610796 hasRelatedWork W2046050672 @default.
- W2779610796 hasRelatedWork W2060680889 @default.
- W2779610796 hasRelatedWork W2070338356 @default.
- W2779610796 hasRelatedWork W2083225653 @default.
- W2779610796 hasRelatedWork W2321997886 @default.
- W2779610796 hasRelatedWork W2744534931 @default.
- W2779610796 hasRelatedWork W3024861764 @default.
- W2779610796 hasRelatedWork W3046190049 @default.
- W2779610796 isParatext "false" @default.
- W2779610796 isRetracted "false" @default.
- W2779610796 magId "2779610796" @default.
- W2779610796 workType "article" @default.