Journal article
Superelasticity and cryogenic linear shape memory effects of CaFe2As2
Nature communications, v 8(1)
20 Oct 2017
PMID: 29057914
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Shape memory materials have the ability to recover their original shape after a significant amount of deformation when they are subjected to certain stimuli, for instance, heat or magnetic fields. However, their performance is often limited by the energetics and geometry of the martensitic-austenitic phase transformation. Here, we report a unique shape memory behavior in CaFe2As2, which exhibits superelasticity with over 13% recoverable strain, over 3 GPa yield strength, repeatable stress-strain response even at the micrometer scale, and cryogenic linear shape memory effects near 50 K. These properties are acheived through a reversible uni-axial phase transformation mechanism, the tetragonal/orthorhombic-to-collapsed-tetragonal phase transformation. Our results offer the possibility of developing cryogenic linear actuation technologies with a high precision and high actuation power per unit volume for deep space exploration, and more broadly, suggest a mechanistic path to a class of shape memory materials, ThCr2Si2-structured intermetallic compounds.
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Details
- Title
- Superelasticity and cryogenic linear shape memory effects of CaFe2As2
- Creators
- John T. Sypek - University of ConnecticutHang Yu - Drexel Univ, Dept Mech Engn & Mech, 3141 Chestnut St, Philadelphia, PA 19104 USAKeith J. Dusoe - University of ConnecticutGil Drachuck - Iowa State UniversityHetal Patel - University of ConnecticutAmanda M. Giroux - University of ConnecticutAlan I. Goldman - Iowa State UniversityAndreas Kreyssig - Iowa State UniversityPaul C. Canfield - Iowa State UniversitySergey L. Bud'ko - Iowa State UniversityChristopher R. Weinberger - Drexel UniversitySeok-Woo Lee - University of ConnecticutAmes Lab., Ames, IA (United States)
- Publication Details
- Nature communications, v 8(1)
- Publisher
- Springer Nature
- Number of pages
- 9
- Grant note
- UConn NASA's Space Technology Research Grants Program DE-AC02-07CH11358 / U.S. Department of Energy; United States Department of Energy (DOE) US Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000413353500032
- Scopus ID
- 2-s2.0-85032207990
- Other Identifier
- 991019350588604721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary