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Papers by Andrew Roosen

Research paper thumbnail of Simulations of microstructural evolution: anisotropic growth and coarsening

Physica A: Statistical Mechanics and its Applications, 1998

Research paper thumbnail of Wulffman: A tool for the calculation and display of crystal shapes

Research paper thumbnail of Materials science in the information age

Technology in Society, 1996

The explosive growth of the Internet and the World Wide Web is revolutionizing society by making ... more The explosive growth of the Internet and the World Wide Web is revolutionizing society by making information accessible in new ways to people in all corners of the world. In scientific research, these advances in information technology have led to new methods of collaboration that overcome geographic limitations and allow researchers to exchange information in ways that were not previously

Research paper thumbnail of Simulation of Crystal Growth With Facetted Interfaces

Research paper thumbnail of Modeling Crystal Growth in a Diffusion Field Using Fully Faceted Interfaces

Journal of Computational Physics, 1994

Research paper thumbnail of A simple model of fully-faceted grain growth and coarsening with non-linear growth laws

Zeitschrift für Metallkunde, 2005

ABSTRACT A numerical simulation of the growth and coarsening of completely faceted particles in a... more ABSTRACT A numerical simulation of the growth and coarsening of completely faceted particles in a two-dimensional closed system is described. The particles grow from a supersaturated solution with driving forces including an anisotropic-Gibbs-Thompson effect. Linear and non-linear growth laws were incorporated. This allows comparison to data obtained from physical experiments of Si3N4 growing from a glass matrix with additions of various rare earths (La, Y, Lu) where particle growth is more or less anisotropic (depending on the particular rare earth dopant). Simulations explore the ranges of kinetic parameters for which particle shapes tend to be dictated by thermodynamic and/or kinetic anisotropy. Comparison to data taken from a series of experiments indicates that La probably has a non-linear growth effect whereas Lu is less so.

Research paper thumbnail of Wulffman: A tool for the calculation and display of crystal shapes

Computational Materials Science, 1998

Research paper thumbnail of Shape evolution by surface diffusion and surface attachment limited kinetics on completely faceted surfaces

Acta Metallurgica et Materialia, 1995

Research paper thumbnail of Equilibrium Shape of Internal Cavities in Sapphire

Journal of the American Ceramic Society, 1997

Page 1. J. Am. Ceram. Soc., 80 [1] 62–68 (1997) Equilibrium Shape of Internal Cavities in Sapphir... more Page 1. J. Am. Ceram. Soc., 80 [1] 62–68 (1997) Equilibrium Shape of Internal Cavities in Sapphire Jung-Hae Choi* and Doh-Yeon Kim* Department of Inorganic Materials Engineering, Seoul National University, Seoul, 151-742, Korea ...

Research paper thumbnail of Simulations of microstructural evolution: anisotropic growth and coarsening

Physica A: Statistical Mechanics and its Applications, 1998

Research paper thumbnail of Wulffman: A tool for the calculation and display of crystal shapes

Research paper thumbnail of Materials science in the information age

Technology in Society, 1996

The explosive growth of the Internet and the World Wide Web is revolutionizing society by making ... more The explosive growth of the Internet and the World Wide Web is revolutionizing society by making information accessible in new ways to people in all corners of the world. In scientific research, these advances in information technology have led to new methods of collaboration that overcome geographic limitations and allow researchers to exchange information in ways that were not previously

Research paper thumbnail of Simulation of Crystal Growth With Facetted Interfaces

Research paper thumbnail of Modeling Crystal Growth in a Diffusion Field Using Fully Faceted Interfaces

Journal of Computational Physics, 1994

Research paper thumbnail of A simple model of fully-faceted grain growth and coarsening with non-linear growth laws

Zeitschrift für Metallkunde, 2005

ABSTRACT A numerical simulation of the growth and coarsening of completely faceted particles in a... more ABSTRACT A numerical simulation of the growth and coarsening of completely faceted particles in a two-dimensional closed system is described. The particles grow from a supersaturated solution with driving forces including an anisotropic-Gibbs-Thompson effect. Linear and non-linear growth laws were incorporated. This allows comparison to data obtained from physical experiments of Si3N4 growing from a glass matrix with additions of various rare earths (La, Y, Lu) where particle growth is more or less anisotropic (depending on the particular rare earth dopant). Simulations explore the ranges of kinetic parameters for which particle shapes tend to be dictated by thermodynamic and/or kinetic anisotropy. Comparison to data taken from a series of experiments indicates that La probably has a non-linear growth effect whereas Lu is less so.

Research paper thumbnail of Wulffman: A tool for the calculation and display of crystal shapes

Computational Materials Science, 1998

Research paper thumbnail of Shape evolution by surface diffusion and surface attachment limited kinetics on completely faceted surfaces

Acta Metallurgica et Materialia, 1995

Research paper thumbnail of Equilibrium Shape of Internal Cavities in Sapphire

Journal of the American Ceramic Society, 1997

Page 1. J. Am. Ceram. Soc., 80 [1] 62–68 (1997) Equilibrium Shape of Internal Cavities in Sapphir... more Page 1. J. Am. Ceram. Soc., 80 [1] 62–68 (1997) Equilibrium Shape of Internal Cavities in Sapphire Jung-Hae Choi* and Doh-Yeon Kim* Department of Inorganic Materials Engineering, Seoul National University, Seoul, 151-742, Korea ...

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