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People John P. Leonard

Assistant Professor, Department of Mechanical Engineering and Materials Science

Email:
Phone: 412-624-3512
Fax: 412-624-8069
Office: BENDM 831

 

Education

PhD, Materials Science, Columbia University, 2000.

Professional Interests

Dr. Leonard's research interests center on phase transformations and processing in thin films.  These areas are explored via nanosecond (KrF) excimer laser irradiation, used to induce various phenomena such as rapid heating, melting, and vaporization.  After irradiation, rapid cooling occurs by heat conduction into the substrate, resulting in rapid solidification, liquid supercooling, metastable phase formation and internal stress incorporation or relaxation.

Specific research topics include laser melting and rapid solidification of elemental and alloy metal films on SiO2 substrates, pulsed laser deposition of metal-oxide films, and silicon-germanium alloy processing.

For more details, visit his personal web site.

Selected Publications

J.E. Kline, J.P. Leonard, "Suppression of Dewetting in Pulsed Laser Melting of Thin Metallic Films on SiO2", Mat. Res. Soc. Symp. Proc., Vol. 854E, (2005).

J.P. Leonard, T.J. Renk, M.O. Thompson, M.J. Aziz, "Solute diffusion in liquid nickel measured by pulsed ion beam melting", Metallurgical and Materials Transactions A, Vol. 35, pp. 2803-2808 (2004).

J. P. Leonard, B. Shin, J. W. McCamy, M. J. Aziz, "Comparison of Growth Morphology in Ge (001) Homoepitaxy Using Pulsed Laser Deposition and MBE", Mat. Res. Soc. Symp. Proc. 749, (2002).

J. P. Leonard, James S. Im, "Stochastic Modeling of Solid Nucleation in Supercooled Liquids", Appl. Phys. Lett. 78, 3454 (2001).

J. P. Leonard, D. B. Kim, A. B. Limanov, James S. Im, "3D Numerical Modeling of Laser Crystallization Processes in Silicon Thin Films", Mat. Res. Soc. Symp. Proc. 580, 233 (2000).

Curriculum Vitae

Professor John P. Leonard joined the faculty in January 2003.  He received his Bachelor of Science degree in Mechanical Engineering from MIT in 1989, and worked in engineering design for several years.  He received his PhD in Materials Science from Columbia University in 2000.  Most recently, he completed 2 years of postdoctoral research at Harvard University, Applied Physics.

Benedum Hall

Dedicated in 1971, Benedum Hall is home to exploration and discovery.