A facile synthesis method for in situ composites of TiB2/B4C and ZrB2/B4C

Parlakyigit A. S., Ergun C.

JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY, cilt.58, sa.2, ss.411-420, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 58 Sayı: 2
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s41779-021-00700-3
  • Dergi Adı: JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.411-420
  • Anahtar Kelimeler: Solution-based synthesis, In situ composite, Transition metal borides, Titanium diboride, Zirconium diboride, Boron carbide, BORON-CARBIDE, SOL-GEL, MICROSTRUCTURE EVOLUTION, ZIRCONIUM, B4C, CERAMICS, POWDER, CONSOLIDATION, DENSIFICATION, PRECURSOR
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

In situ composite particles of titanium diboride/boron carbide (TiB2/B4C) and zirconium diboride/boron carbide (ZrB2/B4C) were synthesized from low-cost boric acid and sucrose-based precursor solution with the addition of titanium (IV) ethoxide and zirconium oxynitrate, respectively. The reaction was conducted at 1650 degrees C for 90 min under Ar (240 L/h) + H-2 (10 L/h) gas flow. The characterization of the resultant powders was performed in terms of phases in particles and their microstructures and elemental mapping. The particles synthesized from Ti-based precursor comprised hexagonal TiB2 platelets and polyhedral B4C particles while those synthesized from Zr-based precursor comprised equiaxed polyhedral ZrB2 particles with slightly elongated polyhedral B4C particles. As Ti and Zr concentrations increased in the precursor solution, the hexagonal lattice parameters of B4C and its corresponding lattice volume decreased. Additionally, the results provide evidence that the solid solubility of C in TiB2 and ZrB2 phases is relatively low.