Abnormal grain growth mediated by fractal boundary migration at the nanoscale.
Abnormal grain growth mediated by fractal boundary migration at the nanoscale.
复制标题
纳米级的分形边界迁移介导的异常晶粒生长。
DOI:
10.1038/s41598-018-19588-4
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发表时间:
2018-01-25
影响因子:
4.6
通讯作者:
Birringer R
中科院分区:
文献类型:
--
作者:
Braun C;Dake JM;Krill CE 3rd;Birringer R
Modern engineered materials are composed of space-filling grains or domains separated by a network of interfaces or boundaries. Such polycrystalline microstructures have the capacity to coarsen through boundary migration. Grain growth theories account for the topology of grains and the connectivity of the boundary network in terms of the familiar Euclidian dimension and Euler’s polyhedral formula, both of which are based on integer numbers. However, we recently discovered an unusual growth mode in a nanocrystalline Pd-Au alloy, in which grains develop complex, highly convoluted surface morphologies that are best described by a fractional dimension of ∼1.2 (extracted from the perimeters of grain cross sections). This fractal value is characteristic of a variety of domain growth scenarios—including explosive percolation, watersheds of random landscapes, and the migration of domain walls in a random field of pinning centers—which suggests that fractal grain boundary migration could be a manifestation of the same universal behavior.
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DOI:
10.1016/0001-6160(65)90200-2
发表时间:
1965-01-01
期刊:
ACTA METALLURGICA
影响因子:
--
作者:
HILLERT, M
通讯作者:
HILLERT, M
影响因子:
2.4
作者:
Fehr, E.;Kadau, D.;Herrmann, H. J.
通讯作者:
Herrmann, H. J.
影响因子:
3.7
作者:
Leibner, A.;Braun, C.;Birringer, R.
通讯作者:
Birringer, R.
影响因子:
8.6
作者:
Araujo, N. A. M.;Herrmann, H. J.
通讯作者:
Herrmann, H. J.
DOI:
10.1007/bf02664244
发表时间:
1971-01-01
期刊:
METALLURGICAL TRANSACTIONS
影响因子:
--
作者:
RAJ, R;ASHBY, MF
通讯作者:
ASHBY, MF