Haydn N.G. Wadley
PositionsUniversity ProfessorEdgar A. Starke, Jr. Research Professor of Materials Science and Engineering Associate Director, Intelligent Processing of Materials Laboratory Education1979 Ph.D., Physics, University of Reading, UK1974 B.S., Chemical Physics (First Class Honors), University of Reading, UK ResearchMy research group addresses the design and development of novel high performance materials and devices. It focuses upon fundamental aspects of their synthesis and processing and the linkages between processing and performance. We have developed numerous methods for making cellular materials, Spintronic devices, and thermal barrier coating systems. Our approach to materials design and development combines structure property relationships (to identify the optimal material states needed for particular applications) with predictive process modeling, in-situ sensing and model predictive control to deliver materials whose internal states are optimized.We have developed several methods for making cellular metals and have explored their application as novel multifunctional materials that enable load supporting structures to perform other functions such as impact protection, power storage, shape morphing and thermal management. Our work in spin based electronics (Spintronics) has explored the fabrication of improved spin valves and magnetic tunnel junctions by controlling atomic assembly during hetero metal deposition and reactive tunnel barrier formation. The group's research in thermal barrier coating systems has led to improvements in the vapor phase processes used for the deposition of these multilayered coatings and has begun to explore new compositions for intermetallic bond coats and the ceramic over-layers that will extend their use temperature. We make extensive use of Monte Carlo and Molecular Dynamics methods to analyze vapor phase atomic transport and to explore atomic and molecular self assembly during the growth of thin films and coating's. We have developed state of the art codes for simulating the assembly of metallic multilayers, metal-metal oxide systems and many semiconductors. The group's sensor research has explored the interaction of ultrasonic and electromagnetic fields with materials. It led to the development of laser ultrasonic, dielectric spectroscopy, microwave scattering, acoustic emission, laser induced luminescence and multifrequency eddy current sensors that have been widely applied to materials as diverse as aluminum alloys and II-VI semiconductors. The group pioneered the integration of insitu sensing with predictive process modeling and feedback control concepts to invent intelligent processing of materials (IPM) control concepts. These are now pervasively used for the processing of materials around the World. Two start-up companies (Directed Vapor Technologies International. and Cellular Materials International.) have been spun out of the group. They are commercializing a vapor depositing technology (directed vapor deposition) and several processes for making periodic cellular materials. I have published 377 papers in journals and conference proceedings, co-authored one book on Cellular Metals, co-edited 6 conference proceedings and have 25 patents either issued or pending. Publications
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