Computer simulations of interactions between ultrafine alumina particles produced by an arc discharge

M. H. Teng; L. D. Marks; D. L. Johnson

doi:10.1557/JMR.1997.0031

Computer simulations of interactions between ultrafine alumina particles produced by an arc discharge

M. H. Teng^*, L. D. Marks, D. L. Johnson

^*Corresponding author for this work

Materials Science and Engineering

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

8 Scopus citations

Abstract

We wrote two computer programs, 3D and BUMP, to interpret transmission electron microscope (TEM) micrographs made during a study of the initial stage sintering of ultrafine alumina particles (UFP's, 20-50 nm in diameter). The first simulated the 3D geometric relationships of particles, from which we concluded that surface diffusion was the predominant sintering mechanism because no shrinkage occurred. BUMP simulated random contact of two particles and showed that the particle chains that formed before sintering were not formed purely by chance. Instead the particles experienced a rearrangement process (rotation and sliding) which reduced the total surface energy.

Original language	English (US)
Pages (from-to)	235-243
Number of pages	9
Journal	Journal of Materials Research
Volume	12
Issue number	1
DOIs	https://doi.org/10.1557/JMR.1997.0031
State	Published - 1997

Funding

This work was supported by the U.S. Department of Energy, Contract No. DE-FG02-87ER45309, and Materials Science and Engineering Department, Northwestern University.

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/JMR.1997.0031

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abstract = "We wrote two computer programs, 3D and BUMP, to interpret transmission electron microscope (TEM) micrographs made during a study of the initial stage sintering of ultrafine alumina particles (UFP's, 20-50 nm in diameter). The first simulated the 3D geometric relationships of particles, from which we concluded that surface diffusion was the predominant sintering mechanism because no shrinkage occurred. BUMP simulated random contact of two particles and showed that the particle chains that formed before sintering were not formed purely by chance. Instead the particles experienced a rearrangement process (rotation and sliding) which reduced the total surface energy.",

author = "Teng, {M. H.} and Marks, {L. D.} and Johnson, {D. L.}",

note = "Funding Information: This work was supported by the U.S. Department of Energy, Contract No. DE-FG02-87ER45309, and Materials Science and Engineering Department, Northwestern University.",

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AU - Marks, L. D.

AU - Johnson, D. L.

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AB - We wrote two computer programs, 3D and BUMP, to interpret transmission electron microscope (TEM) micrographs made during a study of the initial stage sintering of ultrafine alumina particles (UFP's, 20-50 nm in diameter). The first simulated the 3D geometric relationships of particles, from which we concluded that surface diffusion was the predominant sintering mechanism because no shrinkage occurred. BUMP simulated random contact of two particles and showed that the particle chains that formed before sintering were not formed purely by chance. Instead the particles experienced a rearrangement process (rotation and sliding) which reduced the total surface energy.

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Computer simulations of interactions between ultrafine alumina particles produced by an arc discharge

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