The effect of Si on the microstructure and mechanical properties of spark plasma sintered boron carbide

Ma L., Xie K. Y., Toksoy M. F., Kuwelkar K., Haber R. A., Hemker K. J.

Materials Characterization, cilt.134, ss.274-278, 2017 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 134
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.matchar.2017.11.010
  • Dergi Adı: Materials Characterization
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.274-278
  • Anahtar Kelimeler: Boron carbide, Silicon additive, Spark plasma sintering
  • Marmara Üniversitesi Adresli: Hayır

Özet

Fully dense boron carbide discs were achieved by spark plasma sintering boron carbide powders with 10 wt% silicon. The silicon did not diffuse into boron carbide grains to produce a solid solution of Si-doped boron carbide; instead the silicon reacted with impurities in the starting powder to form β-SiC and borosilicate glass. The resultant new phases facilitated densification of the multiphase ceramic through liquid phase-assisted sintering. The resultant material exhibits improved hardness (34.3 GPa Vikers hardness under 1 kg load) with toughness comparable to both Si-free and commercially available boron carbide.