Ultrastrong ductile and stable high-entropy alloys at small scales
10.1038/ncomms8748
Crossref journal-article
Springer Science and Business Media LLC
Nature Communications (297)
Abstract

AbstractRefractory high-entropy alloys (HEAs) are a class of emerging multi-component alloys, showing superior mechanical properties at elevated temperatures and being technologically interesting. However, they are generally brittle at room temperature, fail by cracking at low compressive strains and suffer from limited formability. Here we report a strategy for the fabrication of refractory HEA thin films and small-sized pillars that consist of strongly textured, columnar and nanometre-sized grains. Such HEA pillars exhibit extraordinarily high yield strengths of ∼10 GPa—among the highest reported strengths in micro-/nano-pillar compression and one order of magnitude higher than that of its bulk form—and their ductility is considerably improved (compressive plastic strains over 30%). Additionally, we demonstrate that such HEA films show substantially enhanced stability for high-temperature, long-duration conditions (at 1,100 °C for 3 days). Small-scale HEAs combining these properties represent a new class of materials in small-dimension devices potentially for high-stress and high-temperature applications.

Bibliography

Zou, Y., Ma, H., & Spolenak, R. (2015). Ultrastrong ductile and stable high-entropy alloys at small scales. Nature Communications, 6(1).

Authors 3
  1. Yu Zou (first)
  2. Huan Ma (additional)
  3. Ralph Spolenak (additional)
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Dates
Type When
Created 10 years, 1 month ago (July 10, 2015, 6:03 a.m.)
Deposited 2 years, 7 months ago (Jan. 5, 2023, 6:15 a.m.)
Indexed 34 minutes ago (Aug. 27, 2025, 6:13 p.m.)
Issued 10 years, 1 month ago (July 10, 2015)
Published 10 years, 1 month ago (July 10, 2015)
Published Online 10 years, 1 month ago (July 10, 2015)
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@article{Zou_2015, title={Ultrastrong ductile and stable high-entropy alloys at small scales}, volume={6}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/ncomms8748}, DOI={10.1038/ncomms8748}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Zou, Yu and Ma, Huan and Spolenak, Ralph}, year={2015}, month=jul }