Crystallization Of Fe-based Amorphous Alloy Materials

This article studied the influence of substitute elements-Nb and Zr, differentheating temperature, different heating rate, different time of high-temperturepreservation and relaxation annealing to the process of alloy crystallization by manymeasure methods, such as XRD,DSC and SEM and so on.The experiment result showed that added a few of substitute element (1%quantity)Zr and Nb will obviously changed the original amorphous alloyFe₇₄Al₄Ga₂P₁₂B₄Si₄ thermodynamics parameters——the crystallization tempertureincreased intensity, crystal grain minished sharply and the shape of crystal grainchanged markedly. When Zr was added in alloy, the crystal grain decreased to lum from2um, the shape of crystal grain changed to leaves-shape fromworm-shape. When Nb was added in, the shape 0f crystal grain changed to needle, thesize of grain decreased to about 0.3 um and the shape of crystal grain changed toneedle-shape. In addition, through SEM and energy spectrum analysis, we found thecrysal process of amorphous alloys Fe₇₄Al₄Ga₂P₁₂B₄Si₄, Fe₇₃Nb₁Al₄Ga₂P₁₂B₄Si₄ andFe₇₃Zr₁Al₄Ga₂P₁₂B₄Si₄ were allα-Fe→α-Fe+Fe₅SiP+Al_0.7Fe₃Si_0.3+Fe₃B+remainednoncrystallization phase. The result show that adding substitute elements Zr and Nb did notchange the crystal process. Author analysised and researched the experimentphenomena and result, supplyed some reference and consulting for improvingamorphous alloy thermal stability and producing nanocrystalline/amorphous compoundmaterial.The experiments result also confirmed that time and heating rate all influenced thethree amorphous alloys crystal processment. The heating time is longer, the alloycrystal tempermre is lower, the heating rate is quicker, the crystal temperture ishigher. The experiment result more confirmed that quenching time and heating ratehave prominencely influenc to crystal temperture.Amorphous alloys material have excellent soft-magnetism ability, but lots ofquenching nucleus and high interior pressure restrained their soft-magnetism ability insome extent. Through researching magnetic capability of amorphous alloyFe₇₃Zr₁Al₄Ga₂P₁₂B₄Si₄, we found that properly annealing can prominencely promptalloy soft-magnetism ability, and find the best quenching parameter of the alloythrough experiment. But when the quenching temperture is higher than the crystaltemperture, alloy soft-magnetism ability will deteriorate intensity. Author analysisedand discussed the changing process, supplied some reference for amorphous alloyssoft-magnetism ability appling and preventing their soft-magnetism ability fromdeteriorating.Researching amorphous alloy Fe₇₃Zr₁Al₄Ga₂P₁₂B₄Si₄ relaxation annealing, wefound the time and the tempermre of relaxation annealed didn't change amorphous alloyscrystallization temperature, and didn't chang the shape of crystallization grams, but the size ofgrain changed obviously. Those supplyed some reference and consulting for producingnanocrystalline/amorphous compound material.