Article
Chemistry, Physical
Alexey Rodin, Ainur Khairullin
Summary: The peculiarities of Ni and Fe diffusion in polycrystalline Cu and Cu-Fe alloys at a temperature range of 650-750 degrees C were studied. The obtained values of the Ni GB diffusion triple product were an order of magnitude less than the values obtained by the radiotracer method. The significant supersaturation of the Cu-based solid solution near the Fe/Cu interface was confirmed as a peculiarity of Fe diffusion.
Article
Chemistry, Multidisciplinary
Hanna Bishara, Subin Lee, Tobias Brink, Matteo Ghidelli, Gerhard Dehm
Summary: The study found a consistent relationship between the coincidence site lattice (CSL) type of grain boundaries (GBs) and their resistivity, where high dislocation density and corresponding strain fields contribute to increased resistivity. Additionally, the resistivity of GBs is approximately correlated with their excess volume.
Article
Materials Science, Multidisciplinary
Nicolas J. Peter, Maria J. Duarte, Christoph Kirchlechner, Christian H. Liebscher, Gerhard Dehm
Summary: Experimental results show that the isothermal nanofacet evolution occurs at an asymmetric Sigma 5 tilt grain boundary in the Cu-Ag system, where the excess of Ag solute affects the length of Ag-rich facet segments, while the length of asymmetric facets remains constant. A grain boundary nanofaceting diagram constructed from experimental data explains the relationship between local atomic structure, overall inclination, and Ag solute excess.
Article
Materials Science, Multidisciplinary
J. X. Hou, X. Y. Li, K. Lu
Summary: Tensile tests on gradient nanograined copper samples reveal that GBM is more pronounced in grains with higher Schmid factors, leading to changes in grain boundary angles.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jongpil Ye, Jaehoon Jeong
Summary: The grain structure of graphene significantly influences its properties, making it crucial to control for application. Inconsistent results regarding the correlation between the grain structures of graphene and underlying Cu have been found in previous investigations. Research suggests that the origin of this discrepancy lies in the effects of copper grain boundary structure on graphene growth.
Article
Physics, Applied
Travis Peters, Wanlin Zhu, Marti Checa, Liam Collins, Susan Trolier-McKinstry
Summary: In undoped lead zirconate titanate films, domain walls move in clusters with a correlation length of 0.5-2 μm. Nb doping increases the concentration or mobility of domain walls without changing the cluster area, while Mn doping reduces the contribution of mobile domain walls without changing the cluster area. In both Nb and Mn doped films, the cluster area increases and the cluster density drops as the film thickness increases from 250 to 1250 nm, as observed from the analysis of irreversible to reversible ratios of the Rayleigh coefficients.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Gashaw B. Bizana, Luis A. Barrales-Mora
Summary: Classical theories assume a linear correlation between grain boundary curvature and velocity, but recent experimental observations suggest a more complex relationship in polycrystalline materials. Molecular dynamics simulations of nanosized polycrystalline Al annealing were used to determine the velocity and curvature of approximately 12,000 grain boundaries. The study revealed differences in kinetics behavior at the grain and grain-boundary levels, with a clear correlation between grain boundary curvature and migration direction. However, when considering all grain boundaries, the correlation between velocity and curvature was found to be low, indicating the complexity of grain boundary migration. Factors such as grain boundary character, defect distributions, and stress distribution between neighboring grains were found to influence grain boundary migration behavior.
Article
Materials Science, Multidisciplinary
N. R. Overman, M. J. Olszta, M. Bowden, X. Li, A. Rohatgi, S. N. Mathaudhu, G. J. Grant, S. A. Whalen
Summary: Friction consolidation is a solid phase processing methodology that densifies material through high-shear deformation and pressure at elevated temperature, known for producing extremely refined and homogeneous microstructures, off-axis texture development, and improved material properties.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Zhengwu Fang, Boyang Li, Susheng Tan, Scott Mao, Guofeng Wang
Summary: This study reveals the atomic-scale migration behavior of a typical shear-coupled mixed tilt-twist GB (MGB) in Au nanocrystals. Two distinct migration patterns were observed, mediated by GB disconnections with different crystallographic parameters. The study also found that excess GB sliding and GB plane reorientation accommodate the GB migration. These findings provide valuable insights into optimizing the ductility of metallic nanocrystals through controlling GB migration.
Review
Materials Science, Multidisciplinary
Gregory S. Rohrer, Ian Chesser, Amanda R. Krause, S. Kiana Naghibzadeh, Zipeng Xu, Kaushik Dayal, Elizabeth A. Holm
Summary: Grain boundaries in polycrystalline materials migrate to reduce excess energy. Previous studies found that the migration rates of boundaries in bicrystals are insufficient to explain boundary migration in polycrystals. In this review, we discuss the atomistic mechanisms of grain boundary migration based on simulations and microscopy observations. We also explore the continuum scale understanding of grain boundary migration through simulations and observations. It is concluded that detailed comparisons between experiments and atomistic simulations in polycrystals are necessary to better understand the migration mechanisms, and that current simulations of grain growth are inadequate in reproducing experimental observations.
ANNUAL REVIEW OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
A. I. Kartamyshev, D. O. Poletaev, A. O. Boev, D. A. Aksyonov
Summary: This study reveals the penetration of Li ions into copper, especially at grain boundaries, which can result in the formation of Li-Cu alloys. By minimizing the amount of grain boundaries, the formation of these alloys can be prevented, leading to extended battery lifetimes.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Robert D. Moore, Timothy Beecroft, Gregory S. Rohrer, Christopher M. Barr, Eric R. Homer, Khalid Hattar, Brad L. Boyce, Fadi Abdeljawad
Summary: GB stiffness in Ni can be larger and more anisotropic than energy, with some boundary inclinations exhibiting negative stiffness. Results from this study are qualitatively consistent with experimental observations, providing new avenues for examining the plane normal dependency of GB properties in mesoscale treatments of GB migration and microstructural evolution.
Article
Nanoscience & Nanotechnology
Ooraphan Chirayutthanasak, Rajchawit Sarochawikasit, Apiwat Wisitsorasak, Nopporn Rujisamphan, Timofey Frolov, Tomas Oppelstrup, Somsak Dangtip, Gregory S. Rohrer, Sutatch Ratanaphan
Summary: This study introduces a function for the grain boundary energy of tungsten, allowing the energy distribution of boundaries to be described by crystallographic parameters. The comparison between measured grain boundary areas and energies at difficult-to-determine misorientations shows inverse correlations, similar to observations in other metals.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Megan J. McCarthy, Timothy J. Rupert
Summary: This study investigates the migration behavior of a faceted Sigma 11 boundary in Cu doped with Ag atoms, revealing that solute atoms segregate to a facet with more free volume and greatly reduce boundary velocity in one migration direction. However, a directionally-dependent motion mechanism can escape solute pinning and speed up migration in the other direction, uncovering a new mechanism of chemically-induced anisotropy in grain boundary mobility.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Huangliu Fu, Xin Zhou, Hongtao Xue, Xiuyan Li, K. Lu
Summary: The processing and applications of pure metals are limited by a purity-stability dilemma. However, recent studies have found that by adjusting the structure of grain boundaries, this dilemma can be overcome. It has been discovered that thermal stability and hardness of nanograined copper samples increase with higher purities, contrary to the conventional impurity effect. This anomalous impurity effect provides an alternative direction for stabilizing purer metals.
Article
Geochemistry & Geophysics
Adam J. Griggs, Siwan M. Davies, Peter M. Abbott, Mark Coleman, Adrian P. Palmer, Tine L. Rasmussen, Richard Johnston
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2015)
Article
Materials Science, Multidisciplinary
P. Davies, R. Pederson, M. Coleman, S. Birosca
Article
Nanoscience & Nanotechnology
S. Gardner, W. Li, M. Coleman, R. Johnston
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2016)
Article
Nanoscience & Nanotechnology
M. Coleman, H. Alshehri, R. Banik, W. Harrison, S. Birosca
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2016)
Article
Engineering, Mechanical
Anthony G. Spangenberger, Diana A. Lados, Mark Coleman, Soran Birosca, Mark C. Hardy
INTERNATIONAL JOURNAL OF FATIGUE
(2017)
Article
Nanoscience & Nanotechnology
L. North, D. Labonte, M. L. Oyen, M. P. Coleman, H. B. Caliskan, R. E. Johnston
Article
Engineering, Mechanical
M. R. Bache, C. Coleman, M. P. Coleman, V. Gray, C. Boettcher
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2018)
Article
Materials Science, Multidisciplinary
Valerie Randle, Mark Coleman
Article
Geochemistry & Geophysics
G. M. Pennock, M. Coleman, M. R. Drury, V. Randle
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2009)
Article
Materials Science, Multidisciplinary
D. Dietrich, D. Nickel, M. Krause, T. Lampke, M. P. Coleman, V. Randle
JOURNAL OF MATERIALS SCIENCE
(2011)
Article
Materials Science, Multidisciplinary
Mark Coleman, Valerie Randle
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2008)
Article
Materials Science, Multidisciplinary
V. Randle, M. Coleman, M. Waterton
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2011)
Article
Materials Science, Multidisciplinary
S. J. Davies, S. P. Jeffs, M. P. Coleman, R. J. Lancaster
MATERIALS & DESIGN
(2018)
Proceedings Paper
Materials Science, Ceramics
Valerie Randle, Mark Coleman
RECRYSTALLIZATION AND GRAIN GROWTH IV
(2012)