Document Detail


Removal of stacking-fault tetrahedra by twin boundaries in nanotwinned metals.
MedLine Citation:
PMID:  23340417     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Stacking-fault tetrahedra are detrimental defects in neutron- or proton-irradiated structural metals with face-centered cubic structures. Their removal is very challenging and typically requires annealing at very high temperatures, incorporation of interstitials or interaction with mobile dislocations. Here we present an alternative solution to remove stacking-fault tetrahedra discovered during room temperature, in situ Kr ion irradiation of epitaxial nanotwinned Ag with an average twin spacing of ~8 nm. A large number of stacking-fault tetrahedra were removed during their interactions with abundant coherent twin boundaries. Consequently the density of stacking-fault tetrahedra in irradiated nanotwinned Ag was much lower than that in its bulk counterpart. Two fundamental interaction mechanisms were identified, and compared with predictions by molecular dynamics simulations. In situ studies also revealed a new phenomenon: radiation-induced frequent migration of coherent and incoherent twin boundaries. Potential migration mechanisms are discussed.
Authors:
K Y Yu; D Bufford; C Sun; Y Liu; H Wang; M A Kirk; M Li; X Zhang
Related Documents :
25485127 - Pressure effects on lipids and bio-membrane assemblies.
23616787 - Plant plasma membrane proteomics for improving cold tolerance.
23034757 - Molecular dynamics simulations of lipid bilayers: simple recipe of how to do it.
15527207 - Lithium ion "cyclotron resonance" magnetic fields decrease seizure onset times in lithi...
16844747 - Body temperature-related structural transitions of monotremal and human hemoglobin.
23895437 - A fragile zwitterionic phosphasilene as a transfer agent of the elusive parent phosphin...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Nature communications     Volume:  4     ISSN:  2041-1723     ISO Abbreviation:  Nat Commun     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-01-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101528555     Medline TA:  Nat Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  1377     Citation Subset:  IM    
Affiliation:
Department of Mechanical Engineering, Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843-3123, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  On-demand optogenetic control of spontaneous seizures in temporal lobe epilepsy.
Next Document:  Strain-controlled magnetic domain wall propagation in hybrid piezoelectric/ferromagnetic structures.