powered by CADENAS

Social Share

Scandium hydride (2581 views - Material Database)

Scandium hydride, also known as scandium–hydrogen alloy, is an alloy made by combining scandium and hydrogen. Hydrogen acts as a hardening agent, preventing dislocations in the scandium atom crystal lattice from sliding past one another. Varying the amount of hydrogen controls qualities such as the hardness of the resulting scandium hydride. Scandium hydride with increased hydrogen content can be made harder than scandium. It can be formed by progressive hydrogenation of scandium foil with hydrogen. In the narrow range of concentrations which make up scandium hydride, mixtures of hydrogen and scandium can form two different structures. At room temperature, the most stable form of scandium is the hexagonal close-packed (HCP) structure α-scandium. It is a fairly soft metallic material that can dissolve a moderate concentration of hydrogen, no more than 0.89 wt% at 22 °C. If scandium hydride contains more than 0.89% hydrogen at room temperature then it transforms into a face-centred cubic (FCC) structure, the δ-phase. It can dissolve considerably more hydrogen, as much as 4.29%, which reflects the upper hydrogen content of scandium hydride. Research indicates the existence of a third phase created under extreme conditions termed the η-phase. This phase can dissolve as much as 6.30% hydrogen. Concentration dependent activation-energies are observed for hydrogen diffusion in scandium metal.
Go to Article

Scandium hydride

Scandium hydride

Scandium hydride, also known as scandium–hydrogen alloy, is an alloy made by combining scandium and hydrogen. Hydrogen acts as a hardening agent, preventing dislocations in the scandium atom crystal lattice from sliding past one another. Varying the amount of hydrogen controls qualities such as the hardness of the resulting scandium hydride. Scandium hydride with increased hydrogen content can be made harder than scandium.

It can be formed by progressive hydrogenation of scandium foil with hydrogen.[1]

In the narrow range of concentrations which make up scandium hydride, mixtures of hydrogen and scandium can form two different structures. At room temperature, the most stable form of scandium is the hexagonal close-packed (HCP) structure α-scandium.[2] It is a fairly soft metallic material that can dissolve a moderate concentration of hydrogen, no more than 0.89 wt% at 22 °C. If scandium hydride contains more than 0.89% hydrogen at room temperature then it transforms into a face-centred cubic (FCC) structure, the δ-phase. It can dissolve considerably more hydrogen, as much as 4.29%, which reflects the upper hydrogen content of scandium hydride.

Research indicates the existence of a third phase created under extreme conditions termed the η-phase. This phase can dissolve as much as 6.30% hydrogen.

Concentration dependent activation-energies are observed for hydrogen diffusion in scandium metal.[3]

  1. ^ Chemistry of d-block elements G. Singh (2007)
  2. ^ Manchester, F. D.; Pitre, J. M. (1997). "The H- SC (Hydrogen- Scandium) system". Journal of Phase Equilibria. 18 (2): 194–205. ISSN 1054-9714. doi:10.1007/BF02665706. 
  3. ^ Weaver, H. (1972). "Nuclear-Magnetic-Resonance Investigation of Proton Motion in Scandium Hydride". Physical Review B. 5 (5): 1663–1667. ISSN 0556-2805. doi:10.1103/PhysRevB.5.1663. 

41xx steelAL-6XNAlGaAlloy 20AlnicoAlumelAluminiumAluminium alloyAluminium bronzeAluminium-lithium alloyAmalgam (chemistry)Arsenical bronzeArsenical copperBell metalBerylliumBeryllium copperBillon (alloy)BirmabrightBismanolBismuthBrassBrightrayBronzeBulat steelCalamine brassCast ironCelestriumChinese silverChromelChromiumChromium hydrideCobaltColored goldConstantanCopperCopper hydrideCopper–tungstenCorinthian bronzeCrown goldCrucible steelCunifeCupronickelCymbal alloysDamascus steelDevarda's alloyDuraluminDutch metalElectrical steelElectrumElektron (alloy)ElinvarFernicoFerroalloyFerroceriumFerrochromeFerromanganeseFerromolybdenumFerrosiliconFerrotitaniumFerrouraniumField's metalFlorentine bronzeGalfenolGalinstanGalliumGilding metalGlassGlucydurGoldGuanín (bronze)GunmetalHaynes InternationalHepatizonHiduminiumHigh-speed steelHigh-strength low-alloy steelHydronaliumInconelIndiumInvarIronIron–hydrogen alloyItalmaKanthal (alloy)KovarLeadLithiumMagnaliumMagnesiumMagnox (alloy)MangalloyManganinMaraging steelMarine grade stainlessMartensitic stainless steelMegalliumMelchior (alloy)MercuryMischmetalMolybdochalkosMonelMu-metalMuntz metalMushet steelNichromeNickelNickel hydrideNickel silverNickel titaniumNicrosilNisilNordic GoldOrmoluPermalloyPhosphor bronzePig ironPinchbeck (alloy)PlasticPlexiglasPlutoniumPlutonium–gallium alloyPotassiumPseudo palladiumReynolds 531RhoditeRhodiumRose's metalSamariumSanicro 28ScandiumShakudōSilverSilver steelSodiumSodium-potassium alloySolderSpeculum metalSpiegeleisenSpring steelStaballoyStainless steelSteelStelliteStructural steelSupermalloySurgical stainless steelTerfenol-DTerneTinTitaniumTombacTool steelTumbagaType metalUraniumVitalliumWeathering steelWood's metalWootz steelY alloyZeron 100ZincZirconiumSamarium–cobalt magnetArgentium sterling silverBritannia silverDoré bullionGoloidPlatinum sterlingShibuichiSterling silverTibetan silverTitanium Beta CTitanium alloyTitanium hydrideGum metalTitanium goldTitanium nitrideBabbitt (alloy)Britannia metalPewterQueen's metalWhite metalUranium hydrideZamakZirconium hydrideHydrogenHeliumBoronNitrogenOxygenFluorineMethaneMezzanineAtom

This article uses material from the Wikipedia article "Scandium hydride", which is released under the Creative Commons Attribution-Share-Alike License 3.0. There is a list of all authors in Wikipedia

Material Database

database,rohs,reach,compliancy,directory,listing,information,substance,material