NTRS - NASA Technical Reports Server

Back to Results
Advances in Thin Film Sensor Technologies for Engine ApplicationsAdvanced thin film sensor techniques that can provide accurate surface strain and temperature measurements are being developed at NASA Lewis Research Center. These sensors are needed to provide minimally intrusive characterization of advanced materials (such as ceramics and composites) and structures (such as components for Space Shuttle Main Engine, High Speed Civil Transport, Advanced Subsonic Transports and General Aviation Aircraft) in hostile, high-temperature environments and for validation of design codes. This paper presents two advanced thin film sensor technologies: strain gauges and thermocouples. These sensors are sputter deposited directly onto the test articles and are only a few micrometers thick; the surface of the test article is not structurally altered and there is minimal disturbance of the gas flow over the surface. The strain gauges are palladium-13% chromium based and the thermocouples are platinum-13% rhodium vs. platinum. The fabrication techniques of these thin film sensors in a class 1000 cleanroom at the NASA Lewis Research Center are described. Their demonstration on a variety of engine materials, including superalloys, ceramics and advanced ceramic matrix composites, in several hostile, high-temperature test environments are discussed.
Document ID
Document Type
Conference Paper
Lei, Jih-Fen
(Army Research Lab. Cleveland, OH United States)
Martin, Lisa C.
(NASA Lewis Research Center Cleveland, OH United States)
Will, Herbert A.
(NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1997
Subject Category
Spacecraft Instrumentation
Report/Patent Number
NAS 1.15:107418
Meeting Information
Turbo Expo(Orlando, FL)
Accession Number
Funding Number(s)
PROJECT: RTOP 523-21-13
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available