|
|
 |
| 5.2.2009 |
Invited Talk at the MRS High-Temperature Photonic Structures Symposium: During the week of April 13-17, 2009, at the 2009 Materials Research Society Spring Meeting held in San Francisco, CA., Dr. Jeffrey Eldridge, from the Optical Instrumentation and NDE Branch (RHI), gave an invited talk at the High-Temperature Photonics Structures Symposium, reviewing the research efforts at NASA GRC towards integrating optical diagnostics into multifunctional Thermal Barrier Coatings (TBCs) in support of the Subsonic Fixed Wing Project. The presentation described the substantial progress made using NASA-developed approaches that embed luminescence-based erosion, delamination, and temperature-sensing capabilities into TBCs. In addition, examples of multi-layer TBC designs that have been shown to make TBCs into more effective radiation barriers were presented. It was further shown that the added functionalities of the multilayer TBC designs were implemented without loss in TBC performance. (Point of Contact: Jeffrey Eldridge
|
| 5.2.2009 |
Sub-Atmospheric Plasma Generation/Characterization Facility Completed : A vacuum facility for the generation and evaluation of sub-atmospheric plasmas using fast ionization waves has been completed and the preliminary initial test for plasma generation has been successful. The facility consists of a 5.2 cubic feet chamber and electrical power supplies capable of delivering electrical pulses with up to 40,000 volts in amplitude and 20 nanosecond durations to two electrodes placed inside the chamber. The chamber is equipped with viewing and instrumentation ports for the evaluation of the plasma column formed between the electrodes. Appropriate plasma instrumentation and sensing techniques for measuring electron density, temperature, Lorentz and ohmic forces are being developed. These measurement technologies will help in the design, construction, and performance evaluation of potential plasma actuators for control of a hypersonic vehicle. The safety permit review has been initiated. This work has been supported by the Hypersonic Project of the NASA Fundamental Aeronautic Program. (Point of Contact: Grigory Adamovsky
|
|
|
|
