• Home
  • About
  • Log In
  • Account
  • Search

3.2 Website Header

Topics Committes Important Dates Call for Paper Value Adding Factors Online Submissions
  • Authors Guideline
  • Papers Submission
Program
  • Plenary Speakers
  • Accepted Abstracts
  • General Program
Extra Events
  • Pre-Conference Courses
  • Symposium in honour of     G.M. Carlomagno
  • Tecnical Visit to              CIRA Wind Tunnels
Venue
  • Conference Center
  • Accomodation
  • Transport
  • Naples appeal
Registration Student Award Social Events Sponsor and Exibition Contact
User

This conference is hosted by
Home > Plenary Speakers

Plenary Speakers

Thermal diffusivity measurements as a non destructive tool for the microstructural characterisation and the integrity assessment of thermal barrier coatings
Federico Cernuschi
Power Generation Systems Dep., RSE S.p.A., Italy

An overview of infrared analysis of thermomechanical behavior of materials
André Chrysochoos
Mechanics and Civil Engineering Laboratory, University of Montpellier, France

A novel microspectrometer technology for IR spectral imaging applications
Lorenzo Faraone
Microelectronics Research Group, The University of Western Australia, Australia

IR thermography in heat transfer
Gad Hetsroni
Technion - Israel Institute of Technology, Israel

 

Thermal diffusivity measurements as a non destructive tool for the microstructural characterisation and the integrity assessment of thermal barrier coatings

Federico Cernuschi, Senior scientist

Power Generation Systems Dep., RSE S.p.A., Italy

For thin (less than 200 micron) air plasma spray (APS) and electron beam physical vapor deposition (EB-PVD) ceramic thermal barrier coatings (TBCs) used to protect gas turbine hot path, some non-destructive techniques indicate damage at the bond coat-TBC interface during either ageing or cyclic oxidation tests. However, no technique is available for thick (more than 250 micron) APS TBCs. A semi-quantitative estimation of cracks at the interface of TBCs is obtained from thermal diffusivity values measured on coupons subjected to thermal cycling by using a single side thermographic technique. In fact, during thermal cycling, two phenomena occur: sintering that promotes a significant increase of thermal diffusivity, and cracking that, representing an additional thermal resistance, causes an apparent decrease of thermal diffusivity. For each sample, the thermal diffusivity was measured at fixed lifetimes and the evolution of the cracked fraction of the interface was estimated by adopting a 2-D inversion model. Furthermore, at each of the six lifetime fractions some samples were destructively characterised by image analysis and the results were compared to the estimations given by the inversion model. The microstructure of as sprayed and sintered freestanding APS YPSZ TBC samples has been characterized by measuring thermal diffusivity after filling pores with different gases, by using Hg porosimetry and IA and results have been compared; furthermore, the microstructure and thermal diffusivity of sintered samples have been compared with the sintering forecasts furnished by the Cipitria's sintering code coupled with the Bruggeman model for thermal diffusivity estimation.

Curriculum Vitae:
Federico Cernuschi, the head of the Fossil Fired Power Plant Research Group, gained his degree in physics at University of Milan. Since 1990 he has worked on the development and application of advanced non destructive techniques for integrity assessment of power plants components and for the characterisation of coatings and materials for energy applications. He has been involved in the development of thermal spraying processes by HVOF, plasma spray techniques and laser cladding. He has been responsible for EC funded projects on NDE&T, TBC, CMC materials and laser cladding and COST actions 501 and 522, 536 and 538. He is author of more than 60 papers published on international reviews or presented at conferences about these topics.

back to lecture list

An overview of infrared analysis of thermomechanical behavior of materials

André Chrysochoos, Professor

Mechanics and Civil Engineering Laboratory, University of Montpellier, France

The characterization of material behavior to various loading conditions involves two closely related aspects, namely mechanical and thermal, that can be grouped into one general thermomechanical framework. The goal of this paper is to review specific applications of infrared techniques, over a range of loading conditions such as quasi-static, polycyclic and transient dynamics for various types of materials. The experimental and scientific issues are discussed to emphasize the additional knowledge that can be gained through the application of these infrared techniques to the mechanical characterization of materials. The paper ends by a discussion of desirable future developments in the field

Curriculum Vitae:
Andre Chrysochoos is currently Professor of Mechanical Engineering at the Montpellier University. He received his PHD in 1983 from Montpellier University and defended his "state thesis" in 1987. After a six years period of work at the National Center of the Scientific Research (CNRS), he joined the University of Montpellier in 1989. His awards and honors include, the CNRS Bronze Medal for Excellence in Research and the Applied Research Award ADER-ANVAR for innovative research technology, both in 1988. He became a member of the "Institut Universitaire de France" in 1997 and received the Ernest Dechelle Prize awarded by the French Academy of Sciences in 2002. His research concerns experimental and theoretical aspects of thermomechanical behaviour of solid materials. He developed a quantitative infrared analysis of dissipative and coupling phenomena and used, in parallel, digital image correlation techniques to perform local energy balance associated with heterogeneous deformation processes. He currently serves as a member of the editorial board of the journals "Annals of Solid and Structural Mechanics" and "Strain".

back to lecture list

A novel microspectrometer technology for IR spectral imaging applications

Lorenzo Faraone, Professor

Microelectronics Research Group, The University of Western Australia, Australia

Improving current state-of-the-art infrared (IR) focal plane array (FPA) technologies is focused on reducing cooling requirements and/or adding so-called multi-colour capability, which allows real-time spectral information to be gathered from multiple wavelength bands.  Spectral imaging provides improved target recognition and reduced false alarm rates in military applications, and numerous remote sensing applications in civilian applications.  To address this issue in a compact, light-weight and low-cost solution, a micro-electromechanical systems (MEMS) based technology has been developed that is compatible with large format 2-D imaging IRFPAs.  Such a hybridised structure consists of an electrically tuneable Fabry-Perot filter that is integrated optically ahead of the IR imaging array.  This presentation will describe the development of an integrated microspectrometer technology comprising of a tuneable MEMS filter and an infrared sensor capable of low-voltage tuning across the SWIR and MWIR wavelength bands. In addition, future work to extend the technology into the VIS/NIR and LWIR wavelength bands will also be presented.

Curriculum Vitae:
Professor Faraone is a Member of the Order of Australia (AM), and a Fellow of both the Australian Academy of Science (FAA) and the Australian Academy of Technological Sciences and Engineering (FTSE).  He has published more than 160 international journal papers on his research work, and supervised more than 30 PhD student completions.  He is currently Head of the Microelectronics Research Group (MRG) at The University of Western Australia (UWA), and Director of the WA Centre for Semiconductor Optoelectronics and Microsystems (WACSOM).  Prior to joining UWA in 1987, he worked primarily in the area of CMOS-based microelectronics and non-volatile memory technology with RCA Labs in Princeton, NJ, USA.  Since joining UWA he has worked on compound semiconductor materials and devices, including AlGaN/GaN HEMTs, HgCdTe-based infrared sensor technology and MBE growth, as well as MEMS technologies for infrared applications.  The research activities of the MRG also include research into laser beam induced current (LBIC) imaging, as well as mobility spectrum techniques for magneto-transport studies in advanced semiconductor nanostructures.  This has resulted in the development of the Mobility Spectrum Analysis (MSA) technique that allows the transport properties of individual carriers in a multi-layer/multi-carrier semiconductor system to be determined accurately and unambiguously.

back to lecture list

IR thermography in heat transfer

Gad Hetsroni, Professor Emeritus

Technion - Israel Institute of Technology, Israel

In 1967 Steve Kline, at Stanford, observed that in the wall region the velocity distribution was non uniform but had rather, low and high velocity streaks. Years later we invested the phenomena in UCSB and found that the coherent structures, which were observed before, where probably shaped like funnels which detached themselves from the wall region, and were probably the cause of the turbulence in the flow, and the heat transfer form the wall.  In Haifa we continued the work mainly on heat transfer, and we devised a technique to count the coherent structures in a flume, and relate them to the heat transfer. We also devised a Heated Foil Technique by which we measured the heat transfer from the wall by means of a IR radiometer, and simultaneously observed the coherent structures with a PIV technique. By now we have a fairly complete picture of the flow behavior  and the heat transfer mechanisms in single and two phase flow.

Curriculum Vitae:
Gad was born in Haifa, Israel, on October 10, 1934.    After graduating from high school he was drafted into the IDF and served in some special unit. After the army service he was accepted to the Technion, were he graduated, cum laude, in 1957.  In 1959 he went to Michigan State University, where he got his M.Sc., after one year, and the Ph.D. after two more years. Dr. Hetsroni was hired by Dr L.S. tong to work, as a Senior Engineer,  for Westinghouse, Atomic Power Division in Pittsburgh. His main assignment was to build and tests a scaled model of a reactor. For his achievement he got a Westinghouse prize. Gad then joined the Nuclear Science Department at the Technion, Israel Institute of Technology in 1965, as a lecturer and then a senior lecturer. In 1971 he joined the Mechanical Engineering Department as an Associate Professor. During 1972-73  Gad worked, as a Fellow Engineer, for Westinghouse, Nuclear Fuel Division in Pittsburgh, and was also a Visiting Associate Professor at Carnegie-Mellon University. At Westinghouse Gad designed new replacement fuel, and worked on two-phase flows. This was, at that time, a relatively new discipline in fluid dynamics, and began to have significant importance in design of nuclear reactors, as well as in the chemical and other industries. This new discipline was also of intense academic interest. Since there was no central location for publishing new findings, Gad founded, in 1973, the new International Journal for Multiphase Flows  (Pergamon Press, later to become Elsevier).  He edited the Journal until 2007.  In 1973 Gad returned, as an Associate Professor to the Technion, where he was also appointed to the Danciger Chair in Engineering. He  was elected Dean in 1976. In 1997 Gad became a full Professor, and went, for a Sabbatical, to EPRI in Palo Alto, CA., where he worked on the troubled nuclear steam generators. The nuclear steam generators in many plants failed, and there was an urgent need to find the reasons for the failures and to device remedies. At the same time Gad was also appointed as a visiting scientist at Stanford University. While at EPRI and Stanford, Gad edited  the new Handbook of Multiphase Systems (1982, 1573 p., McGraw Hill; translated into Chinese in 1993). Gad also started, at Stanford, the Two-Phase Short Course, which was eventually moved to UCSB and then to ETH in Zurich. The course continues to be offered in Zurich now for 33 years, and there were over 2,000 participants who graduated from it. During 1980-81 Gad was the head of the National Council for Research and Development (the scientific advisor to the Government of Israel), and as such served on many BOGs, such as Israel Electric Corp, Israel Coal Co., and more. During the years 1981-1986 Gad was the Director of the Sam Neaman Institute for Advanced Research at the Technion. Gad serves on the Executive Committee of the Center for Heat and Mass Transfer, as well as on numerous organization and scientific   committees of conferences around the world.   He is a Fellow of the ASME , where he served as the Vice  President  for Region XIII (the whole world but the USA and Mexico), and on the BOG of the ASME International.    Over all these years Gad continued his active research in the fields of multiphase flow; turbulence-particles interaction; flow and boiling in micro-channels and others. He published over 250 papers; gave over 150 invited and keynote lectures all over the world and supervised 65 graduate students. More recently he is doing seminal work on thermal management of batteries for the future EV.   Over the years Gad was a visiting professor at Stanford, UCSB, The University of Minnesota and UNSW in Australia.  He is also consulting to industries and Governments such as Israel, Italy and Sweden.  

back to lecture list

 


Commercial Sponsors:   Technical Sponsors: