Novel processing route for the fabrication of bulk high-entropy metal diborides

By Giovanna Tallarita, R. Licheri, S. Garroni, R. Orrú, G. Cao. Scripta Materialia, 2019

197 citations recorded by the source corpus.

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.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/1311878c117b0e9fcc6b018623731dc0a564255a

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In Aerospace Engineering

1. Jian Luo
2. P. Hopkins
3. Tyler J. Harrington
4. Andrew J. Wright
5. Kenneth S. Vecchio
6. Joshua Gild

In Mechanical Engineering

1. Jian Luo
2. Andrew J. Wright
3. Joshua Gild
4. P. Hopkins
5. Tyler J. Harrington
6. Kenneth S. Vecchio

Citations in the corpus

• Dual-phase high-entropy ultra-high temperature ceramics (2020, background): “Since then, HEBs [21, 34-36] and high-entropy carbides (HECs) [22-25, 37] such as (Ti0.”
• A high-entropy silicide: (Mo0.2Nb0.2Ta0.2Ti0.2W0.2)Si2 (2019, background): “lications in lithium-ion batteries [15, 16]. Second, high-entropy metal diborides have also been studied by many groups as a new class of promising structural ceramics (UHTCs) with increased hardness [17, 18, 19]; this line of work has further stimulated the subsequent development of high-entropy me”
• Thermal conductivity and hardness of three single-phase high-entropy metal diborides fabricated by borocarbothermal reduction and spark plasma sintering (2020, background): “achieved similar densities without the oxide inclusions via self-propagating synthesis of metal and boron powder [21].”