High-entropy ceramic thin films; A case study on transition metal diborides

Paul H. Mayrhofer; Alexander Kirnbauer; Philipp Ertelthaler; Christian M. Koller

doi:10.1016/j.scriptamat.2018.02.008

High-entropy ceramic thin films; A case study on transition metal diborides

Materials Science 2018-03-01 v1

Authors: Paul H. Mayrhofer , Alexander Kirnbauer , Philipp Ertelthaler , Christian M. Koller

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Abstract

High-entropy materials often outperform their lower-entropy relatives in various aspects, such as thermal stability and fracture toughness. While there are extensive research activities in the field of high-entropy alloys, comparably little is performed for high-entropy ceramics, and especially for high-entropy diborides. Here we show, that not only the hardness of ZrB2 layers can be improved from 43.2 to 45.8 to 47.2 GPa through the formation of solid solution ternary diborides (Zr0.61Ti0.39B2) and high-entropy diborides (Zr0.23Ti0.20Hf0.19V0.14Ta0.24B2), respectively, but especially their thermal stability against structural rearrangements and decomposition towards the constituting binary diborides.

Keywords

materials science alloy microstructure crystal growth and phase transitions

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@article{arxiv.1802.10260,
  title  = {High-entropy ceramic thin films; A case study on transition metal diborides},
  author = {Paul H. Mayrhofer and Alexander Kirnbauer and Philipp Ertelthaler and Christian M. Koller},
  journal= {arXiv preprint arXiv:1802.10260},
  year   = {2018}
}

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High-entropy ceramic thin films; A case study on transition metal diborides

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