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Galfenol (5297 views - Material Database)

In materials science, galfenol is the general term for an alloy of iron and gallium. The name was first given to iron-gallium alloys by United States Navy researchers in 1998 when they discovered that adding gallium to iron could amplify iron's magnetostrictive effect up to tenfold. Galfenol is of interest to sonar researchers because magnetostrictor materials are used to detect sound, and amplifying the magnetostrictive effect could lead to better sensitivity of sonar detectors. Galfenol is also proposed for vibrational energy harvesting, actuators for precision machine tools, active anti-vibration systems, and anti-clogging devices for sifting screens and spray nozzles. Galfenol is machinable and can be produced in sheet and wire form. In 2009, scientists from Virginia Polytechnic Institute and State University, and National Institute of Standards and Technology (NIST) used neutron beams to determine the structure of galfenol. They determined that the addition of gallium changes the lattice structure of the iron atoms from regular cubic cells to one in which the faces of some of the cells become slightly rectangular. The elongated cells tend to clump together in the alloy, forming localized clumps within the material. These clumps have been described by Peter Gehring of the NIST Center for Neutron Research as "something like raisins within a cake".
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Galfenol

Galfenol

In materials science, galfenol is the general term for an alloy of iron and gallium. The name was first given to iron-gallium alloys by United States Navy researchers in 1998 when they discovered that adding gallium to iron could amplify iron's magnetostrictive effect up to tenfold. Galfenol is of interest to sonar researchers because magnetostrictor materials are used to detect sound, and amplifying the magnetostrictive effect could lead to better sensitivity of sonar detectors.[1] Galfenol is also proposed for vibrational energy harvesting, actuators for precision machine tools, active anti-vibration systems, and anti-clogging devices for sifting screens and spray nozzles. Galfenol is machinable and can be produced in sheet and wire form.[2][3]

In 2009, scientists from Virginia Polytechnic Institute and State University, and National Institute of Standards and Technology (NIST) used neutron beams to determine the structure of galfenol. They determined that the addition of gallium changes the lattice structure of the iron atoms from regular cubic cells to one in which the faces of some of the cells become slightly rectangular. The elongated cells tend to clump together in the alloy, forming localized clumps within the material. These clumps have been described by Peter Gehring of the NIST Center for Neutron Research as "something like raisins within a cake".[1]

See also


AlGaAlnicoAluminioAleaciones de aluminioBronce de aluminioAluminium-lithium alloyArsenical bronzeArsenical copperMetal de campanaBerilioBeryllium copperVellón (aleación)BirmabrightBismanolBismutoLatónBronceCalamine brassChinese silverCromoChromium hydrideCobaltoConstantánCobreCopper hydrideCopper–tungstenCorinthian bronzeCunifeCuproníquelCymbal alloysDevarda's alloyDuraluminioDutch metalElectro (aleación)Florentine bronzeGalioGilding metalVidrioGlucydurOroGuanín (bronze)GunmetalHepatizonHiduminiumHydronaliumIndio (elemento)HierroItalmaPlomoMagnalioMagnesioManganinaMegalliumMelchior (alloy)MercuryMolybdochalkosMetal MuntzNicromoNíquelAlpaca (aleación)Oro nórdicoOrmoluPhosphor bronzePinchbeck (alloy)PlásticoPlexiglasPlutonioPotasioRodioMetal de RoseSamarioEscandioShakudōPlataSodioMetal de espejosAcero inoxidableAceroEsteliteAcero laminadoEstañoTitanioTombacTumbagaUranioVitalioMetal de WoodY alloyZincCirconioGalinstanoColored goldRhoditaCrown goldElinvarMetal de FieldFernicoFerroalloyFerrocerioFerrocromoFerromanganeseFerromolybdenumFerrosiliconFerrotitaniumFerrouraniumInvarFundición de hierroIron–hydrogen alloyArrabioKanthalKovarStaballoySpiegeleisenAcero bulatAcero de crisolAcero 41xxAcero de DamascoMangalloyAcero rápidoMushet steelMaraging steelAcero microaleadoReynolds 531Acero eléctricoAcero elásticoAL-6XNCelestriumAlloy 20Marine grade stainlessAcero inoxidable martensíticoSanicro 28Acero quirúrgicoZeron 100Silver steelAcero para herramientasAcero cortenAcero wootzSolderTerneType metalElektron (alloy)Amalgama (química)Magnox (alloy)AlumelBrightrayCromelHaynes InternationalInconelMonelNicrosilNisilNitinolMu-metalPermalloySupermalloyNickel hydridePlutonium–gallium alloyNaKMetal de MischLitioTerfenol-DPseudo palladiumScandium hydrideImán de samario-cobaltoArgentium sterling silverPlata de BritaniaDoré bullionGoloidPlatinum sterlingShibuichiSterling silverTibetan silverTitanium Beta CTitanium alloyTitanium hydrideGum metalTitanium goldNitruro de titanioBabbitt (metal)Metal de BritaniaPeltreQueen's metalWhite metalUranium hydrideZamakZirconium hydrideHidrógenoHelioBoroNitrógenoOxígenoFlúorMetanoEntresueloÁtomo

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