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Synthesis, structure, and properties of polymer‐derived, metal‐reinforced boron carbide cermet composites
Author(s) -
Dyatkin Boris,
Laskoski Matthew,
Edelen William K.,
Qadri Syed B.,
Keller Teddy M.
Publication year - 2020
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13657
Subject(s) - materials science , cermet , boron carbide , nanocrystalline material , composite material , carbide , metal , boron , polymer , ceramic , metallurgy , nanotechnology , chemistry , organic chemistry
We report on a novel polymer‐derived synthesis approach that yields boron carbide monoliths and metal‐reinforced B 4 C cermets. This single‐step approach relies on a preceramic powder blend of boron and an acetylenic resin with a high char yield. At low temperatures below 1500°C and without applied pressures, preceramic precursor reaction bond together and form nanocrystalline refractory B 4 C matrices. Resulting near net shape boron, carbide monoliths exhibit small crystal grain sizes, maintain chemical purity, and exhibit morphological homogeneity. We reinforce the refractory carbide with five different metals and demonstrate the influence of each on the density, hardness, oxidation stability, and electronic conductivity of resulting cermet composites. We assess the optimal synthesis and reinforcement strategies that tailor these nanostructured materials for inexpensive and high‐performing engineering applications.