Fabrication of boron carbide fibers consisting of connected particles by carbothermal reduction via electrospinning

摘要

We successfully fabricated crystalline boron carbide (B4C) fibers consisting of connected particles by carbothermal reduction. The condensed boric acid (H3BO3)-poly(vinyl alcohol) (PVA) product fibers were prepared from a H3BO3-PVA/dimethyl sulfoxide solution with glycerin added by electrospinning. The fibrous B4C precursor consisting of boron oxide and carbon components was prepared by the thermal decomposition of the electrospun condensed H3BO3-PVA product fibers in air. Crystalline B4C fibers consisting of connected particles were fabricated by the heat treatment of the fibrous B4C precursor at 1400 degrees C in an Ar flow. (C) 2019 Elsevier B.V. All rights reserved.