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Interstitial Intermetallic Alloys (Paperback, Softcover reprint of the original 1st ed. 1995)
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Interstitial Intermetallic Alloys (Paperback, Softcover reprint of the original 1st ed. 1995)
Series: NATO Science Series E:, 281
Expected to ship within 10 - 15 working days
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It is well known that the density of molecular hydrogen can be
increased by compression and/or cooling, the ultimate limit in
density being that of liquid hydrogen. It is less well known that
hydrogen densities of twice that of liquid hydrogen can be obtained
by intercalating hydrogen gas into metals. The explanation of this
unusual paradox is that the absorption of molecular hydrogen, which
in TiFe and LaNis is reversible and occurs at ambient temperature
and pressure, involves the formation of hydrogen atoms at the
surface of a metal. The adsorbed hydrogen atom then donates its
electron to the metal conduction band and migrates into the metal
as the much smaller proton. These protons are easily accomodated in
interstitial sites in the metal lattice, and the resulting metal
hydrides can be thought of as compounds formed by the reaction of
hydrogen with metals, alloys, and intermetallic compounds. The
practical applications of metal hydrides span a wide range of
technologies, a range which may be subdivided on the basis of the
hydride property on which the application is based. The capacity of
the metal hydrides for hydrogen absorption is the basis for
batteries as well as for hydrogen storage, gettering, and
purification. The temperature-pressure characteristics of metal
hydrides are the basis for hydrogen compressors, sensors, and
actuators. The latent heat of the hydride formation is the basis
for heat storage, heat pumps, and refrigerators.
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