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15篇 您的检索式:作者名="KARMA ALAIN"
    题名 作者 年代 出处 被引量
1Evolution of Nanoporosity in Dealloying 显示文摘Erlebacher Jonah Aziz Michael J Karma Alain 2001Nature2001,410,:1
2Meandering Transition In Two-Dimensional Excitable Media显示文摘Alain Karma 0,,:1
3Author Correction:Vulnerable window of yield strength for swelling-driven fracture of phase-transforming battery materials显示文摘The original version of this Article contained an error in the spelling of the author Ataollah Mesgarnejad,which was incorrectly given as Atoallah Mesgarnejad.This has now been corrected in both the PDF and HTML versions of the Article.Ataollah Mesgarnejad Alain Karma 2020npj Computational Materials2020,,1:1
4Amplitude equations for polycrystalline materials with interaction between composition and stress显示文摘Robert Spatschek Alain Karma 2010Phys Rev B2010,81,21:1
5Phase field crystal study of grain boundary premelting and shearing in bcc iron显示文摘Ari Adland Alain Karma Robert Spatschek 2013Phys Rev B2013,87,02:1
6Oscillatory Lamellar Microstructure in Off-eutectic Al-Cu Alloys显示文摘Martin Zimmermann Alain Karma Michel Carrard 1990Physical Review B1990,42,7:1
7Evolution of nanoporosity in dealloying显示文摘Jonah Erlebacher Michael J Aziz Alain Karma 2001Nature2001,4103,22:1
8Phase-field study crystal of grain-boundary premelting显示文摘Jesper Mellenthin Alain Karma Mathis Plapp 2008Phys Rev B2008,78,18:1
9Multiscale Finite-Difference-Diffusion-Monte-Carlo Method for Simulating Dendritic Solidification显示文摘Mathis Plapp Alain Karma 2000Journal of Computational Physics2000,,2:1
10Quantitative phase-field modeling of dendritic growth in two and three dimensions显示文摘KARMA ALAIN RAPPEL WOUTER-JAN 1998Physical Review E1998,57,:1
11Morphological instabilities of lamellar eutectics显示文摘Alain Karma Armand Sarkissian 1996Metallurgical and Materials Transactions A1996,,3:1
12Phase-field method for computationally efficient modeling of solidification with arbitrary interface kinetics显示文摘KARMA AlAIN RAPPEL WOUTER-JAN 1996Physical Review E1996,53,:1
13Evolution of nanoporosity in dealloying 显示文摘ERLEBACHER JONAH AZIZ MICHAEL J KARMA ALAIN 2001Nature2001,,410:1
14Vulnerable window of yield strength for swelling-driven fracture of phase-transforming battery materials显示文摘Despite numerous experimental and theoretical investigations of the mechanical behavior of high-capacity Si and Ge Li-ion battery anodes,our basic understanding of swelling-driven fracture in these materials remains limited.Existing theoretical studies have provided insights into elasto-plastic deformations caused by large volume change phase transformations,but have not modeled fracture explicitly beyond Griffith’s criterion.Here,we use a multi-physics phase-field approach to model self-consistently anisotropic phase transformation,elasto-plastic deformation,and crack initiation and propagation during lithiation of Si nanopillars.Our computational results reveal that fracture occurs within a“vulnerable window”inside the two-dimensional parameter space of yield strength and fracture energy and highlight the importance of taking into account the surface localization of plastic deformation to accurately predict the magnitude of tensile stresses at the onset of fracture.They further demonstrate how the increased robustness of hollow nanopillars can be understood as a direct effect of anode geometry on the size of this vulnerable window.Those insights provide an improved theoretical basis for designing next-generation mechanically stable phasetransforming battery materials undergoing large volume changes.Ataollah Mesgarnejad Alain Karma 2020npj Computational Materials2020,,1:0
15Topology-enhanced mechanical stability of swelling nanoporous electrodes显示文摘Materials like silicon and germanium offer a 10-fold improvement in charge capacity over conventional graphite anodes in lithium-ion batteries but experience a roughly threefold volume increase during lithiation,which challenges ensuring battery integrity.Nanoporous silicon,created by liquid-metal-dealloying,is a potentially attractive anode design to mitigate this challenge,exhibiting both higher capacity and extended cycle lifetimes.However,how nanoporous structures accommodate the large volume change is unknown.Here,we address this question by using phase-field modeling to produce nanoporous particles and to investigate their elastoplastic swelling behavior and fracture.Our simulations show that enhanced mechanical stability results from the network topology consisting of ligaments connected by bulbous,sphere-like nodes.The ligaments forcefully resist elongation while the nodes,behaving like isolated spherical particles,experience large stresses driving fracture.However,being smaller compared to a sphere of the same volume as the entire nanoporous particle,the nodes are more protected against fracture.Benjamin E.Grossman-Ponemon Ataollah Mesgarnejad Alain Karma 2023npj Computational Materials2023,,1:0
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