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Prabhat GuptaProfessorPh.D., Case Western Reserve University, 1972 Tel. (614) 292-6769 Office: 284 Watts Hall
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Dr. Prof. Gupta has broad experimental and theoretical interests in the understanding of inorganic glasses, in particular oxide glasses. His interests can be broadly classified into four areas:
Increased Reliability of Glasses
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| Scanning electron micrographs of fracture surfaces collected during tensile testing. The failure stress was 108 ksi. (C) and (D) are the same as (A) and (B) but at a larger magnification. (A) and (B) are the two surfaces from a single break. The flaw is a platinum-rhodium crystal. | |
This work has focused on investigations of the structural, mechanical, chemical, and phase stabilities of glasses. The work on structural relaxation on glass fibers using Differential Scanning Calorimetry was recognized in the 1993 Otto Schott Research Award. The work on mechanical stability (Fracture and Tensile strength) has focussed on high strength reinforcement and optical glass fibers. The chemical stability (i.e., corrosion behavior) studies have been carried out on formed and annealed glass fibers showing for the first time a pronounced effect of the thermal history on the durability of glass fibers. The work on phase stability (crystallization and phase separation) has been carried out in halide glasses.
Process Modeling
Significant improvements in a manufacturing process generally require modeling of the operation. Prof. Gupta has contributed in modeling of diffusion controlled processes such as homogenization and dissolution, of melt spinning of fibers, of energy efficiency of glass melting process, and of visco-elastic and constrained-viscous sintering processes.
Fundamental Studies in Glasses
Prof. Gupta has contributed much to the understanding of the glass transition phenomena, to thermodynamics and statistical mechanics of glasses, and to rationalizing the differing glass forming abilities of various compositions. In addition, he is interested in microscopic understanding of the structure and dynamics of simple glasses.
Novel Phenomena in Glasses
His recent interests are in the areas of non-linear optical properties, photo-induced effects, point defects in glasses, plastic deformation at room and low temperature indentation in glasses, and intrinsic and extrinsic roughness of glass surfaces made by different methods (for example, melt-formed versus fracture surfaces).
Notre-Dame de la Belle-Verriere' from the Cathedral of Chartres. Dr. Gupta's interests include many aspects of glass science, from the statistical mechanics of glasses to the topic "Do Cathedral Glasses Flow?" (see article by the same name co-authored by Dr. Edgar D. Zanotto in the American Journal of Physics)
