Dislocation-induced stop-and-go kinetics of interfacial transformations
Dislocation-induced stop-and-go kinetics of interfacial transformations
复制标题
位错引起的界面转变的停走动力学
DOI:
10.1038/s41586-022-04880-1
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发表时间:
2022
期刊:
影响因子:
64.8
通讯作者:
Zhou, Guangwen
中科院分区:
文献类型:
--
作者:
Sun, Xianhu;Wu, Dongxiang;Zou, Lianfeng;House, Stephen D.;Chen, Xiaobo;Li, Meng;Zakharov, Dmitri N.;Yang, Judith C.;Zhou, Guangwen
Most engineering materials are based on multiphase microstructures produced either through the control of phase equilibria or by the fabrication of different materials as in thin-film processing. In both processes, the microstructure relaxes towards equilibrium by mismatch dislocations (or geometric misfit dislocations) across the heterophase interfaces, , , –. Despite their ubiquitous presence, directly probing the dynamic action of mismatch dislocations has been unachievable owing to their buried nature. Here, using the interfacial transformation of copper oxide to copper as an example, we demonstrate the role of mismatch dislocations in modulating oxide-to-metal interfacial transformations in an intermittent manner, by which the lateral flow of interfacial ledges is pinned at the core of mismatch dislocations until the dislocation climbs to the new oxide/metal interface location. Together with atomistic calculations, we identify that the pinning effect is associated with the non-local transport of metal atoms to fill vacancies at the dislocation core. These results provide mechanistic insight into solid–solid interfacial transformations and have substantial implications for utilizing structural defects at buried interfaces to modulate mass transport and transformation kinetics.
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DOI:
10.1016/0956-7151(94)00296-t
发表时间:
1995-03
期刊:
Acta Metallurgica Et Materialia
影响因子:
--
作者:
J. Hirth;B. Pieraggi;R. Rapp
通讯作者:
J. Hirth;B. Pieraggi;R. Rapp
影响因子:
1.6
作者:
J. D. Plessis;J. H. Merwe
通讯作者:
J. H. Merwe
影响因子:
8.6
作者:
Stach;Schwarz;Hull;Ross;Tromp
通讯作者:
Tromp
影响因子:
56.9
作者:
A. Mcgibbon;S. Pennycook;J. E. Angelo
通讯作者:
A. Mcgibbon;S. Pennycook;J. E. Angelo
DOI:
10.1016/0956-7151(90)90020-h
发表时间:
1990
期刊:
Acta Metallurgica Et Materialia
影响因子:
--
作者:
B. Pieraggi;R. Rapp;V. Loo;J. Hirth
通讯作者:
J. Hirth