Extremely hard and tough high entropy nitride ceramics.

ABSTRACT: Simultaneously hard and tough nitride ceramics open new venues for a variety of advanced applications. To produce such materials, attention is focused on the development of high-entropy ceramics, containing four or more metallic components distributed homogeneously in the metallic sublattice. While the fabrication of bulk high-entropy carbides and borides is well established, high-entropy nitrides have only been produced as thin films. Herein, we report on a newel three-step process to fabricate bulk high-entropy nitrides. The high-entropy nitride phase was obtained by exothermic combustion of mechanically-activated nanostructured metallic precursors in nitrogen and consolidated by spark plasma sintering. The fabricated bulk high-entropy nitride (Hf_0.2Nb_0.2Ta_0.2<

SUBMITTER: Moskovskikh D 

PROVIDER: S-EPMC7669861 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature