Abstract
The extraordinary ability of shape-memory alloys to recover after large imposed deformation motivates efforts to transpose these properties onto ceramics, which would enable practical shape-memory properties at high temperatures and in harsh environments. The theory of mechanical compatibility was utilized to predict promising ceramic candidates in the system (Y0.5Ta0.5O2)1-x-(Zr0.5Hf0.5O2)x, 0.6<x<0.85. When these compatibility conditions are met, a reduction in thermal hysteresis by a factor of 2.5, a tripling of deformability, and a 75% enhancement in strain recovery within the shape-memory effect was found. These findings reveal that predicting and optimizing the chemical composition of ceramics to attain improved crystallographic compatibility is a powerful tool for enabling and enhancing their deformability that could ultimately lead to a highly reversible oxide ceramic shape-memory material.
Original language | English (US) |
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Article number | 093603 |
Journal | Physical Review Materials |
Volume | 3 |
Issue number | 9 |
DOIs | |
State | Published - Sep 23 2019 |
Bibliographical note
Publisher Copyright:© 2019 American Physical Society.