New Synthesis Route for Complex Borides; Rapid Synthesis of Thermoelectric Yttrium Aluminoboride via Liquid-Phase Assisted Reactive Spark Plasma Sintering.

ABSTRACT: Y_xAl_yB₁₄ ceramics are of high interest as high temperature thermoelectric materials with excellent p, n control. In this study, direct synthesis of dense polycrystalline Y_xAl_yB₁₄ (x ~0.64, 0.52 ≤ y ≤ 0.67) ceramics was successfully carried out by spark plasma sintering using commercially available precursors. YB₄, AlB₂ and B powders were reactively sintered with an additive AlF₃ at 1773 K for 5-60 min in reduced Ar atmosphere. The sinterability was remarkably enhanced by liquid phase sintering comparing to conventional synthesis techniques. Phase composition analysis by X-ray diffraction showed that main peaks belong to Y_xAl_yB₁₄ with the MgAlB₁₄ str

SUBMITTER: Son HW 

PROVIDER: S-EPMC7265475 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature