Synthesis and characterization of WB2-WB3-B4C hard composites
2019
Abstract WB2-WB3-B4C composites were fabricated from powder mixtures of W and B13C2 by DC arc melting. XRD analysis illustrated that W has reacted with B13C2 and resulted in the formation of WB2-WB3-B4C composites. Vickers hardness of 55.7 ± 8.5 (load 0.49 N) and 34.2 ± 1.1 GPa (load 4.9 N) with corresponding Young's modulus of 575 GPa were observed for the as-synthesized composites. SEM and XPS results revealed that the composites consist of WB2, WB3, B4C, elemental boron and carbon. Raman spectra confirmed that B4C and carbon coexist in the composites. The harden mechanism of the as-synthesized composites including solid-solution hardening and dispersion hardening were analyzed in detail.
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