A fast grain-growth mechanism revealed in nanocrystalline ceramic oxides

Dilpuneet S. Aidhy; Yanwen Zhang; William J. Weber

doi:10.1016/j.scriptamat.2014.03.020

A fast grain-growth mechanism revealed in nanocrystalline ceramic oxides

Dilpuneet S. Aidhy
, Yanwen Zhang
, William J. Weber

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

Grain growth issues in nanocrystalline ceramic oxides render their highly attractive properties practically unusable due to limited understanding of the underlying grain-growth mechanisms. Two conventional "slow" grain-growth mechanisms, i.e. curvature driven and grain-rotation driven, are shown to be thermally active, and the discovery of a "fast" disorder-driven mechanism is revealed using molecular dynamics simulation on nanocrystalline ceria, in conjunction with experimental observations. We show that this disorder mechanism drives the unexpected fast grain growth observed experimentally during synthesis and irradiation conditions.

Original language	English
Pages (from-to)	9-12
Number of pages	4
Journal	Scripta Materialia
Volume	83
DOIs	https://doi.org/10.1016/j.scriptamat.2014.03.020
State	Published - Jul 15 2014
Externally published	Yes

Keywords

Grain growth
Molecular dynamics simulation
Nanocrystalline ceramic oxide
Radiation damage

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10.1016/j.scriptamat.2014.03.020

Cite this

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title = "A fast grain-growth mechanism revealed in nanocrystalline ceramic oxides",

abstract = "Grain growth issues in nanocrystalline ceramic oxides render their highly attractive properties practically unusable due to limited understanding of the underlying grain-growth mechanisms. Two conventional {"}slow{"} grain-growth mechanisms, i.e. curvature driven and grain-rotation driven, are shown to be thermally active, and the discovery of a {"}fast{"} disorder-driven mechanism is revealed using molecular dynamics simulation on nanocrystalline ceria, in conjunction with experimental observations. We show that this disorder mechanism drives the unexpected fast grain growth observed experimentally during synthesis and irradiation conditions.",

keywords = "Grain growth, Molecular dynamics simulation, Nanocrystalline ceramic oxide, Radiation damage",

author = "Aidhy, \{Dilpuneet S.\} and Yanwen Zhang and Weber, \{William J.\}",

note = "Funding Information: This work was supported as part of the Materials Science of Actinides, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. The computer simulations were performed at the National Energy Research Scientific Computing Center at Lawrence Berkeley National Laboratory. ",

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doi = "10.1016/j.scriptamat.2014.03.020",

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T1 - A fast grain-growth mechanism revealed in nanocrystalline ceramic oxides

AU - Aidhy, Dilpuneet S.

AU - Zhang, Yanwen

AU - Weber, William J.

N1 - Funding Information: This work was supported as part of the Materials Science of Actinides, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. The computer simulations were performed at the National Energy Research Scientific Computing Center at Lawrence Berkeley National Laboratory.

PY - 2014/7/15

Y1 - 2014/7/15

N2 - Grain growth issues in nanocrystalline ceramic oxides render their highly attractive properties practically unusable due to limited understanding of the underlying grain-growth mechanisms. Two conventional "slow" grain-growth mechanisms, i.e. curvature driven and grain-rotation driven, are shown to be thermally active, and the discovery of a "fast" disorder-driven mechanism is revealed using molecular dynamics simulation on nanocrystalline ceria, in conjunction with experimental observations. We show that this disorder mechanism drives the unexpected fast grain growth observed experimentally during synthesis and irradiation conditions.

AB - Grain growth issues in nanocrystalline ceramic oxides render their highly attractive properties practically unusable due to limited understanding of the underlying grain-growth mechanisms. Two conventional "slow" grain-growth mechanisms, i.e. curvature driven and grain-rotation driven, are shown to be thermally active, and the discovery of a "fast" disorder-driven mechanism is revealed using molecular dynamics simulation on nanocrystalline ceria, in conjunction with experimental observations. We show that this disorder mechanism drives the unexpected fast grain growth observed experimentally during synthesis and irradiation conditions.

KW - Grain growth

KW - Molecular dynamics simulation

KW - Nanocrystalline ceramic oxide

KW - Radiation damage

UR - https://www.scopus.com/pages/publications/84901242882

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DO - 10.1016/j.scriptamat.2014.03.020

M3 - Article

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VL - 83

SP - 9

EP - 12

JO - Scripta Materialia

JF - Scripta Materialia

ER -

A fast grain-growth mechanism revealed in nanocrystalline ceramic oxides

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Keywords

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