Dr. Kevin M. Fox '05 has been selected for the inaugural 2013 Du-Co Ceramics Y...
David J. Green
Professor Emeritus of Ceramic Science and Engineering
Department of Materials Science and Engineering
Relationships between fabrication, microstructure and the properties of
brittle materials; including:
RESEARCH STORY A
Technical Fellow, Materials Research
Alcoa Technical Center;
Adjunct Professor of Materials Science and Engineering,
The Pennsylvania State University
Susan Trolier-McKinstry is a professor of ceramic science and engineering at the Pennsylvania State University, where she also serves as the director of the W. M. Keck Smart Materials Integration Laboratory. She obtained B.S. and M.S. degrees in Ceramic Science and Engineering in 1987, and a Ph.D. in Ceramic Science in 1992, all from Penn State. On graduation she joined the faculty there. She has held visiting appointments at the Hitachi Central Research Laboratory in Kokubunji, Tokyo, the Army Research Laboratory at Fort Monmouth, New Jersey, and the Ecole Polytechnique Federale de Lausanne in Switzerland. Her main research interests include dielectric and piezoelectric thin films, the development of texture in bulk ceramic piezoelectrics, and spectroscopic ellipsometry. She has co-authored >180 papers in these areas, and has several patents.
Professor Trolier-McKinstry’s research interests are centered around structure-processing-property relationships in electroceramics. This includes work on dielectric and piezoelectric thin films, texture development in piezoelectric ceramics, and spectroscopic ellipsometry.
In the piezoelectric films area, Prof. Trolier-McKinstry is developing sensors and actuators that are compatible with CMOS electronics (and hence low driving voltages). Her group has approached this by trying to maximize the figure of merit for the material response through control of composition, crystallographic orientation, grain size, and composite connectivity. The work includes fundamental studies on the factors that control domain wall contributions to the properties and the role of octahedral tilt in influencing response. More applied research ranges from damage-free patterning approaches of complex oxides, to fabrication of piezoelectric microelectromechanical systems, including accelerometers, pumps, switches, adaptive optics components, and ultrasound systems with close-coupled electronics. They are also working on preparing high strain actuator films at low processing temperatures (< 400oC) via pulsed laser crystallization.
Bulk and thin film dielectrics are of interest for on and off-chip decoupling capacitors, as well as tunable components. Prof. Trolier-McKinstry’s group emphasizes the development of a wide range of dielectrics covering the permittivity range from 30 to 3000. Recent work has focused on using Rayleigh and Preisach methods to quantify the properties over a wide range of ac and dc electric fields. The same tools are also being used to study reliability and the relative roles of various defect types in controlling the properties.
Texture development can be used to improve electromechanical response in bulk piezoelectrics. Joint programs with Prof. Messing have demonstrated that templated grain growth can be utilized to achieve textured ceramics with properties intermediate between those of randomly axed ceramics and single crystals.
Technologies affected by her research include on and off-chip decoupling capacitors, tunable filters and antennae, miniaturized sensors, micromachined analytical instrumentation, high frequency biomedical ultrasound, and piezoelectric actuators.
Long-Qing Chen is Distinguished Professor of Materials Science and Engineering and Professor of Engineering Science and Mechanics at the Pennsylvania State University. He is a short-term visiting Professor of Materials Science and Engineering at Tsinghua University under the short-term 1000-Scholar program, a guest Professor of Materials Science and Engineering at Zhejiang University, and a guest Professor of Physics at the Beijing University of Science and Technology in China. He received his B.S. degree in Materials Science and Engineering from Zhejiang University in China in 1982. After spending one year as an assistant instructor at Zhejiang University, he came to the United States in 1983 and received his M.S. degree in Materials Science and Engineering from the State University of New York at Stony Brook in 1985 and a Ph.D. degree in Materials Science and Engineering from the Massachusetts Institute of Technology (MIT) in 1990. After a two-year post-doc appointment with Professor Armen G. Khachaturyanat Rutgers University, he joined the faculty at Penn State as an Assistant Professor of Materials Science and Engineering in 1992. He was promoted to Associated Professor in 1998 and Professor in 2002. Professor Chen teaches undergraduate thermodynamics of materials and graduate kinetics of materials processes and also co-teaches one graduate course and one undergraduate course in computational materials science in the department. Professor Chen's main research interest is developing multiscale computational models for predicting microstructure evolution in materials using a combination of atomistic/first-principles calculations and phase-field methods. In particular, he is interested in microstructure evolution during phase transformations, grain growth, Ostwald ripening, ferroelectric and multiferroic domain switching, and coupled ionic/electronic transport in electrochemical systems. His research group collaborates actively with numerous experimental groups, applied mathematicians, and other fellow computational materials scientists and physicists as well as with more than a dozen companies and national labs. Professor Chen has published over 350 authored or co-authored papers (H-index = 51, Number of Citations >10,000), 1 patent licensed by Intel, and co-edited 3 books in the area of computational materials science of microstructures and properties. He has given more than 200 invited talks including 6 at the Gordon Research Conferences. Professor Chen's current and former graduate students have received more than 40 awards including Materials Research Society Graduate Student Gold and Silver Medal Awards, American Ceramic Society Graduate Excellence in Materials Science Awards, Acta Materialia best student paper award, Penn State Materials Research Institute best Ph.D. thesis research award, TMS Young Leader Award, etc. Professor Chen received numerous awards for his work including:
Dr. Chen’s main research interest is in the fundamental understanding of the thermodynamics and kinetics of phase transformations and mesoscale microstructure evolution in bulk solid and thin films using computer simulations. Essentially all engineering materials contain certain types of microstructures, and our success of designing new materials is largely dependent on our ability to control them. Microstructure is a general term that refers to a spatial distribution of structural features that can be phases of different compositions and/or crystal structures, or grains of different orientations, or domains of different structural variants, or domains of different electrical or magnetic polarization, as well as structural defects such as dislocations. It is the size, shape, and spatial arrangement of the local structural features that determine the physical properties of a material such as mechanical, electrical, magnetic and optical properties. For the last decade, Dr. Chen’s group at Penn State is particularly active in developing phase-field models for microstructure evolution during various materials processes including grain growth, coherent precipitation, ferroelectric domain formation, particle coarsening, domain structure evolution in thin films, phase transformation in the presence of structural defects, and effect of stress on microstructure evolution. Current research focus is on the effect of stress/strain on ferroelectric phase transitions and domain structure evolution in ferroelectric and multiferroic thin films, domain structures in ferromagnetic shape memory alloys, electrode microstructure evolution in solid oxide fuel cells and batteries, precipitate microstructure evolution in Al-, Mg-, Ti- and Ni-alloys, strain-dominated morphological evolution, effect of defects such as dislocations on microstructure evolution. Dr. Chen’s group collaborates extensively with experimentalists and with industry.
Alloy development for aerospace and automobile iapplications
Ferroelectric and ferromagnetic thin films for memory, capacitor and electromechanical system applications
Solid oxide fuel cells and batteries
Dr. Kevin M. Fox '05 has been selected for the inaugural 2013 Du-Co Ceramics Y...
Dr. Zi-Kui Liu, Professor of Ma...
David Saint John, a 2012 MatSC grad and instructor in Penn State's College of...
Donald W. Hamer, a 1968 Penn State alumnus and 2013 recipient of the Materials Sci...
Neal Lewis, a junior performing undergraduate research in Professor Clive Randall...
The 40th Taylor Lecture was given on April 23, 2013, by P.M. Ajayan, the Benjamin...
Beecher Watson III, undergraduate student advised by Dr. Douglas Wolfe won the...
Dr. Michael Hickner receive...