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A Comparative Assessment of Hydrogen Embrittlement: palladium and palladium-silver (25 Weight% silver) Subjected to Hydrogen Absorption/Desorption Cycling

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Advances in Chemical Engineering and Science 2016年第3期6卷 246-261页

作者： Gilberto Jimenez Erik Dillon Joseph Dahlmeyer Travis Garrison Tyler Garrison Sedna Darkey Kyle Wald Joseph Kubik Danielle Paciulli Mustakim Talukder Joshua Nott Maria Ferrer Joseph Prinke Priscilla Villaneuva Fred Massicotte Karim Rebeiz Steve Nesbit Andrew Craft Department of Chemistry University of Hartford West Hartford CT USA Institute of Materials Science University of Connecticut Storrs CT USA College of Engineering Phoenicia University Beirut Lebanon Department of Mechanical Engineering Lafayette College Easton PA USA

The negative effects of hydrogen embrittlement on metallic systems have been investigated through determination of the mechanical properties of two metallic systems that were exposed to hydrogen. An assessment of the effects of hydrogen absorption/desorption cycling on the tensile strength, ductility, and microhardness of pure palladium and the alloy palladium-silver (25 weight% silver) has been undertaken. The variables that are the focus of the study are the amount of hydrogen absorbed by the metal, deuterium isotope effect, number of hydrogen absorption/desorption cycles, and the hydrogen exposure temperature. Under all conditions studied, the mechanical properties of pure palladium were significantly altered as a result of hydrogen exposure, with significant hydrogen embrittlement occurring. In contrast, the mechanical properties of the palladium-silver alloy showed little alteration as a result of hydrogen exposure, including virtually no occurrence of hydrogen embrittlement.

关键词： Hydrogen palladium palladium-silver Embrittlement

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Hydrogen FBG Sensor Using Pd/Ag Film With Application in Propulsion System Fuel Tank Model of Aerospace Vehicle

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Photonic Sensors 2014年第3期4卷 254-264页

作者： Said SAAD Lotfi HASSINE Vassim ELFAHEM Group of Electronics and Quantum Physics Laboratory of Advanced Materials and Quantum Phenomena Faculty ofSciences of Tunis 2092 Tunisia National Institute of Applied Sciences and Technology University of Carthage North Urban Center of Tunis-B.P. 676Cedex Tunis 1080 Tunisia Regio iT Gesellschaft mit beschrankter Hafiung Aachen Germany

The high efficiency hydrogen fiber Bragg grating （FBG） sensor is presented. The sensitive film was a new alliance of palladium-silver （Pd-Ag）. In addition, the titanium （Ti） layer was used as the adhesive layer. The presented sensor showed the resolution of more than 60pm/1%H2, and a fast response time of4s - 5s was guaranteed in the 0.1%H2 - 4%H2 range. Moreover, the life time of the sensor was investigated. The obtained results showed that the sensor had an enhanced life time. Furthermore, the sensor was applied in the propulsion system fuel tank model of the aerospace vehicle. The obtained results indicated that it is a prevention system against the disaster aerospace due to hydrogen leakage.

关键词： Hydrogen fiber Bragg grating palladium-silver faster response time propulsion system fuel tank prevention system hydrogen leakage

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