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Title: Ultrahigh elastically compressible and strain-engineerable intermetallic compounds under uniaxial mechanical loading

Abstract

Intermetallic compounds possess unique atomic arrangements that often lead to exceptional material properties, but their extreme brittleness usually causes fracture at a limited strain of less than 1% and prevents their practical use. Thus, it is critical for them to exhibit either plasticity or some form of structural transition to absorb and release a sufficient amount of mechanical energy before failure occurs. This study observes that the ThCr2Si2-structured intermetallic compound (CaFe2As2) and a hybrid of its structure (CaKFe4As4) with 2 μm in diameter and 6 μm in height can exhibit superelasticity with strain up to 17% through a reversible, deformation-induced lattice collapse, leading to a modulus of resilience orders of magnitude higher than that of most engineering materials. Such superelasticity also can enable strain engineering, which refers to the modification of material properties through elastic strain. Density functional theory calculations and cryogenic nanomechanical tests predict that superconductivity in CaKFe4As4 could be turned on/off through the superelasticity process, before fracture occurs, even under uniaxial compression, which is the favorable switching loading mode in most engineering applications. Our results suggest that other members with the same crystal structure (more than 2500 intermetallic compounds) and substitution series based on them should be examinedmore » for the possibility of manifesting similar superelastic and strain-engineerable functional properties.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [3];  [4];  [1];  [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Univ. of Connecticut, Storrs, CT (United States)
  2. Goethe Univ., Frankfurt (Germany)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  4. Department of Materials Science and Engineering and Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Unit 3136, Storrs, Connecticut 06269-3136, USA
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
OSTI Identifier:
1542866
Alternate Identifier(s):
OSTI ID: 1527048
Report Number(s):
IS-J-9979
Journal ID: ISSN 2166-532X
Grant/Contract Number:  
TRR 49; NNX16AR60G; AC02-07CH11358; GBMF4411
Resource Type:
Accepted Manuscript
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 7; Journal Issue: 6; Journal ID: ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Song, Gyuho, Borisov, Vladislav, Meier, William R., Xu, Mingyu, Dusoe, Keith J., Sypek, John T., Valentí, Roser, Canfield, Paul C., and Lee, Seok-Woo. Ultrahigh elastically compressible and strain-engineerable intermetallic compounds under uniaxial mechanical loading. United States: N. p., 2019. Web. doi:10.1063/1.5087279.
Song, Gyuho, Borisov, Vladislav, Meier, William R., Xu, Mingyu, Dusoe, Keith J., Sypek, John T., Valentí, Roser, Canfield, Paul C., & Lee, Seok-Woo. Ultrahigh elastically compressible and strain-engineerable intermetallic compounds under uniaxial mechanical loading. United States. doi:https://doi.org/10.1063/1.5087279
Song, Gyuho, Borisov, Vladislav, Meier, William R., Xu, Mingyu, Dusoe, Keith J., Sypek, John T., Valentí, Roser, Canfield, Paul C., and Lee, Seok-Woo. Wed . "Ultrahigh elastically compressible and strain-engineerable intermetallic compounds under uniaxial mechanical loading". United States. doi:https://doi.org/10.1063/1.5087279. https://www.osti.gov/servlets/purl/1542866.
@article{osti_1542866,
title = {Ultrahigh elastically compressible and strain-engineerable intermetallic compounds under uniaxial mechanical loading},
author = {Song, Gyuho and Borisov, Vladislav and Meier, William R. and Xu, Mingyu and Dusoe, Keith J. and Sypek, John T. and Valentí, Roser and Canfield, Paul C. and Lee, Seok-Woo},
abstractNote = {Intermetallic compounds possess unique atomic arrangements that often lead to exceptional material properties, but their extreme brittleness usually causes fracture at a limited strain of less than 1% and prevents their practical use. Thus, it is critical for them to exhibit either plasticity or some form of structural transition to absorb and release a sufficient amount of mechanical energy before failure occurs. This study observes that the ThCr2Si2-structured intermetallic compound (CaFe2As2) and a hybrid of its structure (CaKFe4As4) with 2 μm in diameter and 6 μm in height can exhibit superelasticity with strain up to 17% through a reversible, deformation-induced lattice collapse, leading to a modulus of resilience orders of magnitude higher than that of most engineering materials. Such superelasticity also can enable strain engineering, which refers to the modification of material properties through elastic strain. Density functional theory calculations and cryogenic nanomechanical tests predict that superconductivity in CaKFe4As4 could be turned on/off through the superelasticity process, before fracture occurs, even under uniaxial compression, which is the favorable switching loading mode in most engineering applications. Our results suggest that other members with the same crystal structure (more than 2500 intermetallic compounds) and substitution series based on them should be examined for the possibility of manifesting similar superelastic and strain-engineerable functional properties.},
doi = {10.1063/1.5087279},
journal = {APL Materials},
number = 6,
volume = 7,
place = {United States},
year = {2019},
month = {6}
}

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    Works referencing / citing this record:

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