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)B2 phase and its concurrent consolidation up to 92.5% relative density is achieved by processing the SHS powders at 1950 °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.
Novel processing route for the fabrication of bulk high-entropy metal diborides / Tallarita, Giovanna; Licheri, Roberta; Garroni, Sebastiano; Orrù, Roberto; Cao, Giacomo. - In: SCRIPTA MATERIALIA. - ISSN 1359-6462. - 158:(2019), pp. 100-104. [10.1016/j.scriptamat.2018.08.039]
Novel processing route for the fabrication of bulk high-entropy metal diborides
Garroni, Sebastiano;
2019-01-01
Abstract
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)B2 phase and its concurrent consolidation up to 92.5% relative density is achieved by processing the SHS powders at 1950 °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.File | Dimensione | Formato | |
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