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

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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.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Northwestern University, 2225 N. Campus Dr., 60208, Evanston, Illinois, USA

    M. H. Teng, L. D. Marks & D. L. Johnson

Authors
  1. M. H. Teng
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  2. L. D. Marks
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  3. D. L. Johnson
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Teng, M.H., Marks, L.D. & Johnson, D.L. Computer simulations of interactions between ultrafine alumina particles produced by an arc discharge. Journal of Materials Research 12, 235–243 (1997). https://doi.org/10.1557/JMR.1997.0031

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