A Comparative Assessment of Hydrogen Embrittlement: Palladium and Palladium-Silver (25 Weight% Silver) Subjected to Hydrogen Absorption/Desorption Cycling
- 1 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 2 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 3 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 4 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 5 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 6 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 7 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 8 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 9 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 10 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 11 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 12 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 13 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 14 Department of Chemistry, University of Hartford, West Hartford, CT, USA
- 15 Institute of Materials Science, University of Connecticut, Storrs, CT, USA
- 16 College of Engineering, Phoenicia University, Beirut, Lebanon
- 17 Department of Mechanical Engineering, Lafayette College, Easton, PA, USA
- 18 Department of Chemistry, University of Hartford, West Hartford, CT, USA
Abstract
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.
- Flanagan, T., Noh, H., Craft, A. and Andersson, Y. (1995) The Solubility of Hydrogen and Deuterium in Crystalline Pd9Si2. Journal of Solid State Chemistry, 120, 90-95. http://dx.doi.org/10.1006/jssc.1995.1381
- Sartori, S., Cuevas, F., and Latroche, M. (2016) Metal Hydrides Used as Negative Electrodes Materials in Li-Ion Batteries. Applied Physics A, 122, 1-7. http://dx.doi.org/10.1007/s00339-016-9674-x
- Reshak, A. (2013) MgH2 and LiH Metal Hydrides Crystals as Novel Hydrogen Storage Material: Electronic Structure and Optical Properties. International Journal of Hydrogen Energy, 38, 11946-11954. http://dx.doi.org/10.1016/j.ijhydene.2013.06.118
- Kamazawa, K., Aoki, M., Noritake, T., Miwa, K., Sugiyama, J., Towata, S., Ishikiriyama, M., Callear, S., Jones, M., and David, W. (2013) In-Operando Neutron Diffraction Studies of Transition Metal Hydrogen Storage Materials. Advanced Energy Materials, 3, 39-42. http://dx.doi.org/10.1002/aenm.201200390
- Bulak, J., Jimenez, G., Millette, N., Rebeiz, K. and Craft, A. (2007) Stress-Induced Changes to the Triple-Point Phase Boundary of the Niobium-Deuterium System. Journal of Phase Equilibria and Diffusion, 28, 422-429. http://dx.doi.org/10.1007/s11669-007-9158-y
- Rebeiz, K., Dahlmeyer, J., Garrison, Tr., Garrison, Ty., Darkey, S., Paciulli, D., Talukder, M., Kubic, J., Wald, K., Massicotte, F., Nesbit, S. and Craft, A. (2015) Tensile Properties of a Series of Palladium-Silver Alloys Exposed to Hydrogen. Journal of Energy Engineering, 141, 1-7.
- Ross, D. (2006) Hydrogen Storage: The Major Technological Barrier to the Development of Hydrogen Fuel Cell Cars. Vacuum, 80, 1084-1089. http://dx.doi.org/10.1016/j.vacuum.2006.03.030
- Mazzucco, A., Voskuilen, T., Waters, E., Pourpoint, T. and Rokuni, M. (2016) Heat Exchanger Selection and Design Analyses for Metal Hydride Heat Pump Systems. International Journal of Hydrogen Energy, 41, 4198-4213. http://dx.doi.org/10.1016/j.ijhydene.2016.01.016
- Nayebossadri, S., Speight, J. and Book, D. (2014) Effects of Low Ag Additions on the Hydrogen Permeability of Pd-Cu-Ag Hydrogen Separation Membranes. Journal of Membrane Science, 451, 216-225. http://dx.doi.org/10.1016/j.memsci.2013.10.002
- Lynch, S. (2012) Hydrogen Embrittlement Phenomena and Mechanisms. Corrosion Reviews, 30, 105-123. http://dx.doi.org/10.1515/corrrev-2012-0502
- Lewis, F. (1967) The Palladium Hydrogen System. Academic Press, London.