Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Ajay Annamareddy"'
Autor:
Ajay Annamareddy, Jacob Eapen
Publikováno v:
Entropy, Vol 19, Iss 5, p 227 (2017)
Li2O belongs to the family of antifluorites that show superionic behavior at high temperatures. While some of the superionic characteristics of Li2O are well-known, the mechanistic details of ionic conduction processes are somewhat nebulous. In this
Externí odkaz:
https://doaj.org/article/e965760f5dfa4c1db3329323b25fc4fb
Short-timescale atomic rearrangements are fundamental to the kinetics of glasses and frequently dominated by one atom moving significantly (a rearrangement), while others relax only modestly. The rates and directions of such rearrangements (or hops)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e85b26a9e0e8400d09daabed79f96fbb
http://arxiv.org/abs/2211.08924
http://arxiv.org/abs/2211.08924
Autor:
Debaditya Chatterjee, Jan Schroers, Ajay Annamareddy, Jittisa Ketkaew, Paul M. Voyles, Dane Morgan
Publikováno v:
ACS Nano. 15:11309-11316
The dynamics near the surface of glasses can be much faster than in the bulk. We studied the surface dynamics of a Pt-based metallic glass using electron correlation microscopy with sub-nanometer resolution. Our studies show an ∼20 K suppression of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a61ada996aa0f2c17edec2c3242d5235
https://doi.org/10.1021/acsnano.1c00500
https://doi.org/10.1021/acsnano.1c00500
Autor:
Ajay Annamareddy, Jacob Eapen
Publikováno v:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 379
The ordered structure A 2 B 2 O 6 O’ in pyrochlores engenders twin rows of inequivalent anion sublattices each centred on alternating cations. While it is known that cation antisite disorder augments the ionic conductivity by several orders of magn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::996eb792c2db8559e586bd21bda5c930
https://doi.org/10.1098/rsta.2019.0452
https://doi.org/10.1098/rsta.2019.0452
The enhancement of surface diffusion (DS) over the bulk (DV) in metallic glasses (MGs) is well documented and likely to strongly influence the properties of glasses grown by vapor deposition. Here, we use classical molecular dynamics simulations to i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14e91b2dace4e13dff89b03d119d97fd
http://arxiv.org/abs/2108.08400
http://arxiv.org/abs/2108.08400
Autor:
Yuhui Li, Ajay Annamareddy, Dane Morgan, Zheng Yu, Bu Wang, Chengrong Cao, John H. Perepezko, M. D. Ediger, Paul M. Voyles, Lian Yu
Publikováno v:
Physical review letters. 128(7)
Surface diffusion is vastly faster than bulk diffusion in some glasses, but only moderately enhanced in others. We show that this variation is closely linked to bulk fragility, a common measure of how quickly dynamics is excited when a glass is heate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::484a6ff4cb4858062eac627931913ade
https://pubmed.ncbi.nlm.nih.gov/35244425
https://pubmed.ncbi.nlm.nih.gov/35244425
Autor:
Ajay Annamareddy, Jacob Eapen
Publikováno v:
Defect and Diffusion Forum. 375:43-56
UO2 transforms into a superionic conductor at temperatures in excess of 2000 K with oxygen ions becoming mobile and exhibiting collective diffusive dynamics. While the response of UO2 to irradiation is of current interest, the possible impact of supe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9466a14e4c0cbf81dd45c677c4a72de2
https://doi.org/10.4028/www.scientific.net/ddf.375.43
https://doi.org/10.4028/www.scientific.net/ddf.375.43
Autor:
Ajay Annamareddy, Jacob Eapen
Publikováno v:
Ionics. 23:1043-1047
Neutron scattering/diffraction experiments and atomistic simulations reveal that anions in fluorite superionic conductors show rapid disordering at a characteristic temperature T α, which is distinct from the superionic or λ transition temperature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54b2d7f0c8df1d3411f65e9792212234
https://doi.org/10.1007/s11581-017-2007-z
https://doi.org/10.1007/s11581-017-2007-z
Autor:
Ajay Annamareddy, Jacob Eapen
Publikováno v:
Journal of Nuclear Materials. 483:132-141
Neutron scattering experiments show significant oxygen disorder in UO2 at temperatures above 2000 K. The nature of the disorder, however, has not been ascertained with certainty. Using atomistic simulations and metrics from statistical mechanics we s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15a4b4fb54704781f567df182b41c072
https://doi.org/10.1016/j.jnucmat.2016.10.042
https://doi.org/10.1016/j.jnucmat.2016.10.042
Publikováno v:
Acta Materialia. 209:116794
The bulk and surface dynamics of Cu50Zr50 metallic glass were studied using classical molecular dynamics (MD) simulations. As the alloy undergoes cooling, it passes through liquid, supercooled, and glassy states. While bulk dynamics showed a marked s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d7593665d77f4e8434786fcdf711ef2
https://doi.org/10.1016/j.actamat.2021.116794
https://doi.org/10.1016/j.actamat.2021.116794