Synthesis and Characterization of ZrB₂-ZrC Composite Powders from Zircon Sand by Self-Propagating High-Temperature Synthesis Method

Abstract:

ZrB₂-ZrC composite powders were synthesized from zircon sand by self-propagating high-temperature synthesis (SHS). The reactions were verified and the feasibility of obtaining the predicted products was calculated from the adiabatic temperature (T_ad) and the equilibrium composition using the HSC^® chemistry program. The results show that the SHS products consisted of ZrB₂, ZrC, ZrO₂, ZrSiO₄, MgO, and Mg₂SiO₄. Leaching the products with 0.5 M of HCl solution eliminated the by-product of MgO and the intermediate Mg₂SiO₄ phases. The phase composition of the products was characterized by X-ray diffraction (XRD) and the morphologies were characterized by scanning electron microscopy (SEM) coupled with energy-dispersive X-ray (EDX).

• Periodical: Materials Science Forum (Volume 934)
• Pages: 66-70
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.934.66
• Online since: October 2018
• Authors: Singsarothai Saowanee*, Niyomwas Sutham, Tawat Chanadee
• Keywords: Self-Propagating High-Temperature Synthesis (SHS), Zircon, ZrB₂-ZrC

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