清華大學材料科學與工程研究院《材料科學論壇》

學術報告

報告題目：  Thermal Spray as an Additive and Layered Manufacturing Technology for Applications in Energy Systems

報告人：    Sanjay Sampath（Center for Thermal Spray Research, Stony Brook University, Stony Brook, NY,USA）

報告時間：  2018年9月10日（周一），上午10:00

報告地點：  清華大學逸夫科學技術樓A205學術報告廳

聯系人：    楊志剛老師（62783203）

報告摘要：
Thermal spraying is a directed melt spray deposition process, in which inorganic particles in the diameter range of 1-100 microns are heated, melted (in some cases partially), propelled and impacted onto a prepared substrate. A rapid sequence of events occurs including: melting, impact (in some cases shock), spreading and rapid solidification, all of which take place in microsecond timescales, enabling materials synthesis from extreme conditions. The sprayed coating is resultant from successive assemblage of such microscale impacted droplets (splats) producing mesoscale thick films or coatings. The coatings thus produced are anisotropic, layered structures with multiple length scales of material character and interfacial defects, with concomitant implications on properties. The layered assembly also imparts gradients in residual stresses within the thickness of the coating. These effects are in large part deemed “unintentional” and incorporated in many applications with limited manipulation. With advancements in understanding of process dynamics and the ability to control microstructures at both the splat and coating level, a fresh opportunity is available to engineer the layered assembly to provide novel through thickness properties and functionalities. In a sense, thermal spray can be considered within the context of emerging additive manufacturing concepts where the characteristics of the assembly can be manipulated across different available length scales. In this presentation, several embodiments of such concepts will be shown using the interplay among coating architecture design, materials and manufacturing. Specific examples include novel multilayer, multifunctional thermal barrier coatings, multifunctional coatings in fuel cells and thermoelectric devices. Illustrative examples of their applicability in industrial systems will also be highlighted.

報告人簡介：
Dr. Sanjay Sampath, is currently Distinguished Professor of Materials Science and Engineering at Stony Brook University (SUNY) and director of the Center for Thermal Spray Research (www.sunysb.edu/ctsr) an interdisciplinary industry-university partnership in the field of thermal spray materials processing and surface engineering.  He received his Ph.D. degree from Stony Brook in Materials Science in 1989.  After graduating, he spent four years at GTE Sylvania involved in research, development, and processing of refractory metal compounds and composites.  Upon joining the faculty at Stony Brook University in 1993, Dr. Sampath has directed research efforts on various federal and industrially funded programs.  Under the auspices of the NSF Center, he directed a group of a dozen or so interdisciplinary faculty members towards fundamental understanding of thermal spray processes, materials and applications.  The self-sustaining Center (since 2005) is home to the Industrial Consortium for Thermal Spray Technology comprising of 35 leading companies aimed at knowledge transfer from fundamental research to applications.   He was also principal investigator on the DARPA Mesoscale Integrated Conformal Electronics (MICE) project enabling 3D printing of sensors via direct write thermal spray technology. Dr. Sampath has 180 journal publications to his credit, 13 patents and winner of several best paper awards. He has advised more than 40 MS and PHD students over 20 post-doctoral fellows and more than 100 undergraduates. He received the SUNY Chancellor’s Award for excellence in scholarship and creative activities in its inaugural year, was elected Fellow of ASM International, recipient of 2007 R&D 100 award for developing direct write technology  and was inducted as Fellow of the American Ceramic Society.  In 2011, he was recognized as a State University of New York Distinguished Professor, highest faculty designation of the SUNY system. In 2015 he was inducted into the Thermal Spray Society Hall-of-Fame.  In 2017 he received the Application to Practice Award from TMS the Materials Society.