Journal
JOM
Volume 70, Issue 7, Pages 1074-1080Publisher
SPRINGER
DOI: 10.1007/s11837-018-2851-y
Keywords
-
Categories
Funding
- UConn Start-up Funding
- NASA's Space Technology Research Grants Program
- U.S. Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering
- U.S. Department of Energy [DE-AC02-07CH11358]
- National Science Foundation [ACI-1532235, ACI-1532236]
- University of Colorado Boulder
- Colorado State University
Ask authors/readers for more resources
The plastic deformation and fracture mechanisms in single-crystalline CaFe2As2 has been studied using nanoindentation and density functional theory simulations. CaFe2As2 single crystals were grown in a Sn-flux, resulting in homogeneous and nearly defect-free crystals. Nanoindentation along the [001] direction produces strain bursts, radial cracking, and lateral cracking. Ideal cleavage simulations along the [001] and [100] directions using density functional theory calculations revealed that cleavage along the [001] direction requires a much lower stress than cleavage along the [100] direction. This strong anisotropy of cleavage strength implies that CaFe2As2 has an atomic-scale layered structure, which typically exhibits lateral cracking during nanoindentation. This special layered structure results from weak atomic bonding between the (001) Ca and Fe2As2 layers.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available