Superelasticity in micro-scale shape memory ceramic particles
Name
Superelasticity in micro-scale.pdf
Size
323.44 KB
Format
Adobe PDF
Checksum (MD5)
986b7eadd598fae7efa649a5e5325137
Author(s)
Du, Zehui
Zeng, Xiao Mei
Liu, Qing
Gan, Chee Lip
Schuh, Christopher A
Date Issued
October 2016
Journal
Acta Materialia
Publisher
Elsevier
Citation
Du, Zehui, Xiao Mei Zeng, Qing Liu, Christopher A. Schuh, and Chee Lip Gan. “Superelasticity in Micro-Scale Shape Memory Ceramic Particles.” Acta Materialia 123 (January 2017): 255–263 © 2016 Acta Materialia Inc
Version
Author's final manuscript
Abstract
Shape memory ceramics that exhibit repeatable superelastic deformation are of considerable significance for possible energy damping and micro-actuation applications, and the present work aims to further establish the structural conditions required to avoid fracture in these brittle materials. Spray dried micro-scale superelastic ceramic particles with a variety of grain structures were produced, ranging from single crystal to oligocrystal to polycrystalline particles. Micro-compression experiments showed that whereas polycrystalline samples fracture upon loading, oligocrystal and single crystal particles can exhibit cyclic superelasticity, the latter particles achieving highly reproducible superelasticity to over one hundred cycles with particle compressions up to 3.8% and dissipated energy up to 20–40 MJ/m³ per cycle. The mechanisms of structural evolution and fatigue during cyclic loading are also explored. Keywords
ZrO₂
Superelasticity
Cycling
Fatigue
Shape memory ceramics
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.actamat.2016.10.047
