Title
High-entropy metal diborides: a new class of ultra-high temperature ceramics
Conference Dates
September 17-20, 2017
Abstract
Several equimolar, five-component, metal diborides were fabricated via high-energy ball milling and spark plasma sintering [Scientific Reports 6:37946 (2016)] or conventional pressure-less sintering. Most compositions synthesized, e.g., (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)B2, (Hf0.2Zr0.2Ta0.2Mo0.2Ti0.2)B2 and several others, processed single solid-solution phases of the hexagonal AlB2 structure, while a few other compositions yielded two or more boride phases. These materials represent a new type of ultra-high temperature ceramic (UHTC) as well as a new class of high-entropy materials that possess a non-cubic (hexagonal) and layered (quasi-2D) crystal structure (Fig. 1).
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Recommended Citation
Jian Luo, Joshua Gild, Tyler Harrington, Yuanyao Zhang, Tao Hu, Kenneth Vecchio, Cormac Toher, Pranab Sarker, Stefano Curtarolo, Jeff Braun, Lavina Backman, Elizabeth Opila, Patrick Hopkins, Samuel Daigle, Jon-Paul Maria, and Donald Brenner, "High-entropy metal diborides: a new class of ultra-high temperature ceramics" in "Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications IV", Jon Binner, The University of Birmingham, Edgbaston, United Kingdom Bill Lee, Imperial College, London, United Kingdom Eds, ECI Symposium Series, (2017). https://dc.engconfintl.org/uhtc_iv/29