The detection of hydrogen leaks in aerospace applications, especially those involving hydrogen fuel propulsion systems, is of extreme importance for reasons of reliability, safety, and economy. Motivated by leaks occurring in liquid hydrogen lines supplying the main engine of the Space Shuttle, NASA Lewis has initiated a program to develop point-contact hydrogen sensors which address the needs of aerospace applications. Several different approaches are being explored. They include the fabrication of PdAg Schottky diode structures, the characterization of PdCr as a hydrogen sensitive alloy, and the use of SiC as a semiconductor for hydrogen sensors. This paper discusses the motivation behind and present status of each of the major components of the NASA LeRC hydrogen sensor program.
Development of Hydrogen Sensor Technology at NASA Lewis Research Center
1993
20 pages
Report
No indication
English
Space Safety , Semiconductor Devices , Laboratory & Test Facility Design & Operation , Aerospace safety , Fuel systems , Gas detectors , Hydrogen fuels , Leakage , Liquid hydrogen , Propulsion system performance , Schottky diodes , Sensors , Aerospace engineering , Fabrication , Propulsion system configurations , Electric contacts , Reliability analysis , Semiconductors (Materials) , Space shuttles
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