Journal
SCRIPTA MATERIALIA
Volume 158, Issue -, Pages 100-104Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.08.039
Keywords
High-entropy ceramics; Borides; Spark Plasma Sintering; Self-propagating High-temperature Synthesis; X-ray diffraction (XRD)
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A single high-entropy phase material with hexagonal structure is produced by a two-steps processing method. Elemental reactants are first remarkably converted by Self-propagating High-temperature Synthesis (SHS). The completion of the chemical transformation to the desired (Hf0.2Mo0.2Ta0.2Nb0.2Ti0.2)B-2 phase and its concurrent consolidation up to 92.5% relative density is achieved by processing the SHS powders at 1950 degrees C via Spark Plasma Sintering. It is clearly evidenced that the use of the SHS technique is extremely beneficial to promote the formation of high-entropy ceramics, as compared to the time consuming ball milling treatment alternatively adopted. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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