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Synthesis and material properties of polymer-derived niobium carbide and niobium nitride nanocrystalline ceramics

Ceramics International, ISSN: 0272-8842, Vol: 47, Issue: 1, Page: 1163-1168
2021
  • 12
    Citations
  • 0
    Usage
  • 21
    Captures
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    Mentions
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    12
    • Citation Indexes
      12
  • Captures
    21

Article Description

Nanocrystalline niobium carbide (NbC) ceramics and niobium carbide-niobium nitride (NbC/NbN) composites were synthesized at low temperatures without high-pressure sintering using a single-step polymer-derived approach from a meltable pre-ceramic blend. Niobium hydride (NbH 5 ) and 1,2,4,5-tetrakis(phenylethynyl)benzene (TPEB) reacted at 1500 °C under argon or nitrogen in a tube furnace to form NbC or NbC/NbN with high purities and nanosized grains. Superconductivity measurements indicated that NbC/NbN ceramics exhibited a mixed phase system with two distinct T c values, and higher elemental niobium content within solids yielded lower T c. The resulting ceramic monoliths exhibited homogeneous morphologies and controllable amounts of free carbon in the composite matrix. Niobium carbide and nitride composites demonstrated good air oxidation stability up to 450 °C.

Bibliographic Details

Matthew Laskoski; Joseph Prestigiacomo; Boris Dyatkin; Teddy M. Keller; Wadia Mahzabeen; Arica R. Shepherd; Mehana N. Daftary; Jadah S. Clarke; Arianna Neal; Syed B. Qadri; Mike Osofsky

Elsevier BV

Materials Science; Chemical Engineering

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