TY  - INPR
A1  - Xiao, Shuyang
A1  - Borisov, Vladislav
A1  - Lesseux, Guilherme Gorgen
A1  - Rommel, Sarshad
A1  - Song, Gyuho
A1  - Maita, Jessica M.
A1  - Aindow, Mark
A1  - Valentí, Roser
A1  - Canfield, Paul C.
A1  - Lee, Seok-Woo
T1  - Pseudoelasticity of SrNi2P2 micropillar via double lattice collapse and expansion
T2  - arXiv
N2  - The maximum recoverable strain of most crystalline solids is less than 1% because plastic deformation or fracture usually occurs at a small strain. In this work, we show that a SrNi2P2 micropillar exhibits pseudoelasticity with a large maximum recoverable strain of ~14% under uniaxial compression via unique reversible structural transformation, double lattice collapse-expansion that is repeatable under cyclic loading. Its high yield strength (~3.8±0.5 GPa) and large maximum recoverable strain bring out the ultrahigh modulus of resilience (~146±19MJ/m3) a few orders of magnitude higher than that of most engineering materials. The double lattice collapse-expansion mechanism shows stress-strain behaviors similar with that of conventional shape memory alloys, such as hysteresis and thermo-mechanical actuation, even though the structural changes involved are completely different. Our work suggests that the discovery of a new class of high performance ThCr2Si2-structured materials will open new research opportunities in the field of pseudoelasticity
KW  - SrNi2P2
KW  - micropillar compression
KW  - pseudoelasticity
KW  - maximum recoverable strain
KW  - density functional theory
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/82451
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-824519
UR  - https://arxiv.org/abs/2108.11999v1
IS  - 2108.11999 Version 1
PB  - arXiv
ER  -