Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Grain boundary diffusion in CoCrFeMnNi high entropy alloy: kinetic hints
  towards a phase decomposition   Grain boundary self-diffusion of $^{57}$Co, $^{51}$Cr, $^{59}$Fe and
$^{54}$Mn in a coarse-grained, single-phase fcc CoCrFeMnNi high entropy alloy
is measured in a wide temperature range of 643 to 1273~K in both C- and B-type
kinetic regimes after Harrison's classification. The results suggest that the
product of the pertinent segregation factors, $s$, and the grain boundary
width, $\delta$, is about 0.5~nm for all elements at temperatures $T>800$~K.
Whereas one short-circuit contribution is observed at higher temperatures above
800~K, the penetration profiles in the C-type kinetic regime (643 -- 703~K)
reveal two distinct contributions that hint towards a phase decomposition at a
fraction of high-angle grain boundaries at these temperatures. A correlative
microscopy combining transmission Kikuchi diffraction and atom probe tomography
manifests formation of neighbouring Ni-Mn-rich and Cr-rich precipitates at a
segment of high angle grain boundaries. Transmission electron microscopy
revealed an increased dislocation density in the vicinity of such interfaces
which is suggested to be a reason of the enhanced diffusion rates at low
temperatures for such short circuits.

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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: quant-ph